$CHGG
CHEGG, INC Stock $chgg

$chgg Overview Financials Valuation SEC Filings Company Website

2019 Form 10-K Financial Statement

#000136495420000041 Filed on February 20, 2020

Income Statement

Concept	2019	2018 Q4	2018 Q3
Revenue	$410.9M	$95.68M	$74.24M
YoY Change	27.98%	30.16%	18.51%
Cost Of Revenue	$92.18M	$22.10M	$19.92M
YoY Change	15.23%	13.92%	-10.91%
Gross Profit	$318.7M	$73.61M	$54.32M
YoY Change	32.21%	35.99%	34.84%
Gross Profit Margin	77.57%	76.93%	73.17%
Selling, General & Admin	$161.2M	$32.20M	$35.69M
YoY Change	21.69%	14.18%	13.29%
% of Gross Profit	50.56%	43.75%	65.7%
Research & Development	$139.8M	$33.50M	$29.05M
YoY Change	22.29%	46.93%	46.13%
% of Gross Profit	43.85%	45.51%	53.47%
Depreciation & Amortization	$24.20M	$6.200M	$5.900M
YoY Change	44.05%	24.0%	13.46%
% of Gross Profit	7.59%	8.42%	10.86%
Operating Expenses	$300.9M	$65.70M	$64.75M
YoY Change	21.68%	28.57%	25.87%
Operating Profit	$17.82M	$7.544M	-$10.43M
YoY Change	-386.45%	149.31%	-6.51%
Interest Expense	$19.59M	-$3.800M	-$3.800M
YoY Change	-274.88%
% of Operating Profit	109.93%	-50.37%
Other Income/Expense, Net	-$24.79M	$1.300M	-$2.563M
YoY Change	242.47%	160.0%	-1159.09%
Pretax Income	-$6.971M	$5.100M	-$13.00M
YoY Change	-62.56%	45.71%	19.03%
Income Tax	$2.634M	-$300.0K	$700.0K
% Of Pretax Income		-5.88%
Net Earnings	-$9.605M	$5.347M	-$13.71M
YoY Change	-35.48%	46.13%	19.04%
Net Earnings / Revenue	-2.34%	5.59%	-18.47%
Basic Earnings Per Share	-$0.08	$0.05	-$0.12
Diluted Earnings Per Share	-$0.08	$0.04	-$0.12
COMMON SHARES
Basic Shares Outstanding	119.2M shares	115.1M shares	114.2M shares
Diluted Shares Outstanding	119.2M shares	125.6M shares	114.2M shares

Balance Sheet

Concept	2019	2018 Q4	2018 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$768.6M	$468.0M	$459.9M
YoY Change	64.23%	124.78%	126.44%
Cash & Equivalents	$146.2M	$374.7M	$379.0M
Short-Term Investments	$381.1M	$93.30M	$80.90M
Other Short-Term Assets	$27.10M	$9.510M	$26.65M
YoY Change	90.85%	21.22%	11.25%
Inventory
Prepaid Expenses		$4.673M	$7.099M
Receivables	$11.50M	$12.73M	$8.620M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$807.3M	$494.9M	$502.3M
YoY Change	63.12%	116.18%	108.59%
LONG-TERM ASSETS
Property, Plant & Equipment	$103.3M	$59.90M	$52.95M
YoY Change	72.45%	26.13%	17.45%
Goodwill		$149.5M	$149.8M
YoY Change		19.36%	28.84%
Intangibles		$25.92M	$27.81M
YoY Change		22.51%	67.56%
Long-Term Investments	$310.5M	$16.10M	$15.00M
YoY Change	1828.57%	-20.69%	-11.76%
Other Assets	$18.80M	$14.62M	$4.523M
YoY Change	28.77%	288.26%	2.35%
Total Long-Term Assets	$681.7M	$266.0M	$250.0M
YoY Change	156.28%	22.03%	25.41%
TOTAL ASSETS
Total Short-Term Assets	$807.3M	$494.9M	$502.3M
Total Long-Term Assets	$681.7M	$266.0M	$250.0M
Total Assets	$1.489B	$760.9M	$752.3M
YoY Change	95.69%	70.26%	70.92%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$7.400M	$8.177M	$4.283M
YoY Change	-9.76%	16.0%	103.08%
Accrued Expenses	$42.20M	$34.08M	$47.00M
YoY Change	39.74%	9.66%	12.06%
Deferred Revenue		$17.42M
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$71.40M	$59.67M	$76.56M
YoY Change	19.6%	15.73%	16.08%
LONG-TERM LIABILITIES
Long-Term Debt	$900.3M	$283.7M	$280.1M
YoY Change	217.34%
Other Long-Term Liabilities	$18.50M	$6.964M	$7.016M
YoY Change	164.29%	61.77%	34.92%
Total Long-Term Liabilities	$918.8M	$290.6M	$287.1M
YoY Change	216.06%	6651.03%	5376.79%
TOTAL LIABILITIES
Total Short-Term Liabilities	$71.40M	$59.67M	$76.56M
Total Long-Term Liabilities	$918.8M	$290.6M	$287.1M
Total Liabilities	$990.2M	$350.3M	$363.7M
YoY Change	182.67%	527.02%	410.84%
SHAREHOLDERS EQUITY
Retained Earnings		-$406.6M	-$411.9M
YoY Change		3.82%	4.21%
Common Stock		$818.2M	$801.5M
YoY Change		4.51%	4.88%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$498.8M	$410.6M	$388.6M
YoY Change
Total Liabilities & Shareholders Equity	$1.489B	$760.9M	$752.3M
YoY Change	95.69%	70.26%	70.92%

Cashflow Statement

Concept	2019	2018 Q4	2018 Q3
OPERATING ACTIVITIES
Net Income	-$9.605M	$5.347M	-$13.71M
YoY Change	-35.48%	46.13%	19.04%
Depreciation, Depletion And Amortization	$24.20M	$6.200M	$5.900M
YoY Change	44.05%	24.0%	13.46%
Cash From Operating Activities	$113.4M	$30.40M	$21.20M
YoY Change	50.98%	39.45%	59.4%
INVESTING ACTIVITIES
Capital Expenditures	$42.33M	-$13.20M	-$7.900M
YoY Change	35.56%	112.9%	6.76%
Acquisitions	$79.15M
YoY Change	128.42%
Other Investing Activities	-$661.1M	-$23.30M	-$18.90M
YoY Change	1188.69%	21.99%	-80.69%
Cash From Investing Activities	-$703.4M	-$36.40M	-$26.90M
YoY Change	752.13%	43.87%	-74.45%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net	$20.00M
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	$603.5M	2.200M	100.0K
YoY Change	135.36%	-71.79%	-99.93%
NET CHANGE
Cash From Operating Activities	$113.4M	30.40M	21.20M
Cash From Investing Activities	-$703.4M	-36.40M	-26.90M
Cash From Financing Activities	$603.5M	2.200M	100.0K
Net Change In Cash	$13.49M	-3.800M	-5.600M
YoY Change	-94.58%	-188.37%	-109.96%
FREE CASH FLOW
Cash From Operating Activities	$113.4M	$30.40M	$21.20M
Capital Expenditures	$42.33M	-$13.20M	-$7.900M
Free Cash Flow	$71.08M	$43.60M	$29.10M
YoY Change	61.94%	55.71%	40.58%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2018Q4	chgg	Deferred Tax Liabilities Convertible Senior Notes DeferredTaxLiabilitiesConvertibleSeniorNotes	46000	USD
CY2019	chgg	Available For Sale Securities Weighted Average Maturity AvailableForSaleSecuritiesWeightedAverageMaturity	P9M
CY2019	dei	Amendment Flag AmendmentFlag	false
CY2019	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2019	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2019	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2019
CY2019	dei	Entity Central Index Key EntityCentralIndexKey	0001364954
CY2018Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	229000	USD
CY2019Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	56000	USD
CY2018Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2018Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	400000000	shares
CY2019Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	400000000	shares
CY2018Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	115500418	shares
CY2019Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	121583501	shares
CY2018Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	115500418	shares
CY2019Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	121583501	shares
CY2017	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	0	USD
CY2018	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	0	USD
CY2019	us-gaap	Employee Service Share Based Compensation Allocation Of Recognized Period Costs Capitalized Amount EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount	0	USD
CY2018Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.001
CY2019Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.001
CY2018Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	10000000	shares
CY2019Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	10000000	shares
CY2018Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2019Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2018Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2019Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2019	dei	Document Type DocumentType	10-K
CY2019	dei	Document Annual Report DocumentAnnualReport	true
CY2019	dei	Document Period End Date DocumentPeriodEndDate	2019-12-31
CY2019	dei	Document Transition Report DocumentTransitionReport	false
CY2019	dei	Entity File Number EntityFileNumber	001-36180
CY2019	dei	Entity Registrant Name EntityRegistrantName	CHEGG, INC
CY2019	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2019	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	20-3237489
CY2019	dei	Entity Address Address Line1 EntityAddressAddressLine1	3990 Freedom Circle
CY2019	dei	Entity Address City Or Town EntityAddressCityOrTown	Santa Clara
CY2019	dei	Entity Address State Or Province EntityAddressStateOrProvince	CA
CY2019	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	95054
CY2019	dei	City Area Code CityAreaCode	408
CY2019	dei	Local Phone Number LocalPhoneNumber	855-5700
CY2019	dei	Security12b Title Security12bTitle	Common Stock, $0.001 par value per share
CY2019	dei	Trading Symbol TradingSymbol	CHGG
CY2019	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2019	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2019	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2019	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2019	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2019	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2019	dei	Entity Small Business EntitySmallBusiness	false
CY2019	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2019	dei	Entity Shell Company EntityShellCompany	false
CY2019Q2	dei	Entity Public Float EntityPublicFloat	4479899092	USD
CY2020Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	121890028	shares
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	387520000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	374664000	USD
CY2019Q4	us-gaap	Short Term Investments ShortTermInvestments	381074000	USD
CY2018Q4	us-gaap	Short Term Investments ShortTermInvestments	93345000	USD
CY2019Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	11529000	USD
CY2018Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	12733000	USD
CY2019Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	10538000	USD
CY2018Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	4673000	USD
CY2019Q4	us-gaap	Other Assets Current OtherAssetsCurrent	16606000	USD
CY2018Q4	us-gaap	Other Assets Current OtherAssetsCurrent	9510000	USD
CY2019Q4	us-gaap	Assets Current AssetsCurrent	807267000	USD
CY2018Q4	us-gaap	Assets Current AssetsCurrent	494925000	USD
CY2019Q4	us-gaap	Long Term Investments LongTermInvestments	310483000	USD
CY2018Q4	us-gaap	Long Term Investments LongTermInvestments	16052000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	87359000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	59904000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	214513000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	149524000	USD
CY2019Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	34667000	USD
CY2018Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	25915000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	15931000	USD
CY2019Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	18778000	USD
CY2018Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	14618000	USD
CY2019Q4	us-gaap	Assets Assets	1488998000	USD
CY2018Q4	us-gaap	Assets Assets	760938000	USD
CY2019Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	7362000	USD
CY2018Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	8177000	USD
CY2019Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	18780000	USD
CY2018Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	17418000	USD
CY2019Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	5283000	USD
CY2019Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	39964000	USD
CY2018Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	34077000	USD
CY2019Q4	us-gaap	Liabilities Current LiabilitiesCurrent	71389000	USD
CY2018Q4	us-gaap	Liabilities Current LiabilitiesCurrent	59672000	USD
CY2019Q4	us-gaap	Senior Long Term Notes SeniorLongTermNotes	900303000	USD
CY2018Q4	us-gaap	Senior Long Term Notes SeniorLongTermNotes	283668000	USD
CY2019Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	14513000	USD
CY2019Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	3964000	USD
CY2018Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	6964000	USD
CY2019Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	918780000	USD
CY2018Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	290632000	USD
CY2019Q4	us-gaap	Liabilities Liabilities	990169000	USD
CY2018Q4	us-gaap	Liabilities Liabilities	350304000	USD
CY2019Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2018Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2019Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2018Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2019Q4	us-gaap	Common Stock Value CommonStockValue	122000	USD
CY2018Q4	us-gaap	Common Stock Value CommonStockValue	116000	USD
CY2019Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	916095000	USD
CY2018Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	818113000	USD
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-1096000	USD
CY2018Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-1019000	USD
CY2019Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-416292000	USD
CY2018Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-406576000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	498829000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	410634000	USD
CY2019Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1488998000	USD
CY2018Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	760938000	USD
CY2019	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	410926000	USD
CY2018	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	321084000	USD
CY2017	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	255066000	USD
CY2019	us-gaap	Cost Of Revenue CostOfRevenue	92182000	USD
CY2018	us-gaap	Cost Of Revenue CostOfRevenue	79996000	USD
CY2017	us-gaap	Cost Of Revenue CostOfRevenue	80175000	USD
CY2019	us-gaap	Gross Profit GrossProfit	318744000	USD
CY2018	us-gaap	Gross Profit GrossProfit	241088000	USD
CY2017	us-gaap	Gross Profit GrossProfit	174891000	USD
CY2019	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	139772000	USD
CY2018	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	114291000	USD
CY2017	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	81926000	USD
CY2019	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	63569000	USD
CY2018	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	54714000	USD
CY2017	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	51240000	USD
CY2019	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	97489000	USD
CY2018	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	77714000	USD
CY2017	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	64411000	USD
CY2019	us-gaap	Restructuring Charges RestructuringCharges	97000	USD
CY2018	us-gaap	Restructuring Charges RestructuringCharges	589000	USD
CY2017	us-gaap	Restructuring Charges RestructuringCharges	1047000	USD
CY2019	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	0	USD
CY2018	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	0	USD
CY2017	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	4766000	USD
CY2019	us-gaap	Operating Expenses OperatingExpenses	300927000	USD
CY2018	us-gaap	Operating Expenses OperatingExpenses	247308000	USD
CY2017	us-gaap	Operating Expenses OperatingExpenses	193858000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	17817000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	-6220000	USD
CY2017	us-gaap	Operating Income Loss OperatingIncomeLoss	-18967000	USD
CY2019	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-44851000	USD
CY2018	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-11225000	USD
CY2017	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-74000	USD
CY2019	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	20063000	USD
CY2018	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	3987000	USD
CY2017	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	560000	USD
CY2019	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-24788000	USD
CY2018	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-7238000	USD
CY2017	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	486000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-6971000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-13458000	USD
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CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2634000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1430000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1802000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-9605000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	-14888000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	-20283000	USD
CY2019	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.08
CY2018	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.13
CY2017	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.20
CY2019	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	119204000	shares
CY2018	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	113251000	shares
CY2017	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	100022000	shares
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-9605000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	-14888000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	-20283000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	668000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	76000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-187000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-745000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-813000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	81000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-77000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-737000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-106000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-9682000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-15625000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-20389000	USD
CY2016Q4	us-gaap	Stockholders Equity StockholdersEquity	221939000	USD
CY2017	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	147609000	USD
CY2017	chgg	Stock Issued During Period Value Employee Stock Purchase Planand Stock Options Exercised StockIssuedDuringPeriodValueEmployeeStockPurchasePlanandStockOptionsExercised	23656000	USD
CY2017	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	-20112000	USD
CY2017	chgg	Stock Issued During Period Value Common Warrants Exercised StockIssuedDuringPeriodValueCommonWarrantsExercised	0	USD
CY2017	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	38359000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-106000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	-20283000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	391062000	USD
CY2018	us-gaap	Adjustments To Additional Paid In Capital Equity Component Of Convertible Debt AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt	62444000	USD
CY2018	chgg	Adjustments To Additional Paid In Capital Purchase Of Capped Call AdjustmentsToAdditionalPaidInCapitalPurchaseOfCappedCall	39227000	USD
CY2018	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	20000000	USD
CY2018	chgg	Stock Issued During Period Value Employee Stock Purchase Planand Stock Options Exercised StockIssuedDuringPeriodValueEmployeeStockPurchasePlanandStockOptionsExercised	29113000	USD
CY2018	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	-49086000	USD
CY2018	chgg	Stock Issued During Period Value Common Warrants Exercised StockIssuedDuringPeriodValueCommonWarrantsExercised	0	USD
CY2018	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	52030000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-737000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	-14888000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	410634000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Equity Component Of Convertible Debt AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt	206747000	USD
CY2019	chgg	Adjustments To Additional Paid In Capital Purchase Of Capped Call AdjustmentsToAdditionalPaidInCapitalPurchaseOfCappedCall	97200000	USD
CY2019	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	20000000	USD
CY2019	chgg	Stock Issued During Period Value Employee Stock Purchase Planand Stock Options Exercised StockIssuedDuringPeriodValueEmployeeStockPurchasePlanandStockOptionsExercised	35097000	USD
CY2019	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	-94568000	USD
CY2019	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	3003000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	64909000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-77000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-9605000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	498829000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-9605000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	-14888000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	-20283000	USD
CY2019	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	30247000	USD
CY2018	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	22805000	USD
CY2017	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	19337000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	64909000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	52030000	USD
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	38359000	USD
CY2019	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	0	USD
CY2018	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	0	USD
CY2017	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	4766000	USD
CY2019	chgg	Loss From Write Offs Of Textbooks LossFromWriteOffsOfTextbooks	0	USD
CY2018	chgg	Loss From Write Offs Of Textbooks LossFromWriteOffsOfTextbooks	0	USD
CY2017	chgg	Loss From Write Offs Of Textbooks LossFromWriteOffsOfTextbooks	314000	USD
CY2019	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	1009000	USD
CY2018	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	93000	USD
CY2017	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	1368000	USD
CY2019	us-gaap	Business Combination Contingent Consideration Arrangements Change In Amount Of Contingent Consideration Liability1 BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1	0	USD
CY2018	us-gaap	Business Combination Contingent Consideration Arrangements Change In Amount Of Contingent Consideration Liability1 BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1	0	USD
CY2017	us-gaap	Business Combination Contingent Consideration Arrangements Change In Amount Of Contingent Consideration Liability1 BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1	-626000	USD
CY2019	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	43202000	USD
CY2018	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	10494000	USD
CY2017	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	0	USD
CY2019	chgg	Deferred Income Tax Expense Benefit Acquisitions DeferredIncomeTaxExpenseBenefitAcquisitions	-39000	USD
CY2018	chgg	Deferred Income Tax Expense Benefit Acquisitions DeferredIncomeTaxExpenseBenefitAcquisitions	-323000	USD
CY2017	chgg	Deferred Income Tax Expense Benefit Acquisitions DeferredIncomeTaxExpenseBenefitAcquisitions	0	USD
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	4385000	USD
CY2018	us-gaap	Operating Lease Cost OperatingLeaseCost	0	USD
CY2017	us-gaap	Operating Lease Cost OperatingLeaseCost	0	USD
CY2019	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	416000	USD
CY2018	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-65000	USD
CY2017	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-68000	USD
CY2019	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-1829000	USD
CY2018	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	1538000	USD
CY2017	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	175000	USD
CY2019	us-gaap	Increase Decrease In Prepaid Expenses Other IncreaseDecreaseInPrepaidExpensesOther	12930000	USD
CY2018	us-gaap	Increase Decrease In Prepaid Expenses Other IncreaseDecreaseInPrepaidExpensesOther	4921000	USD
CY2017	us-gaap	Increase Decrease In Prepaid Expenses Other IncreaseDecreaseInPrepaidExpensesOther	-13550000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	1494000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-48000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-1049000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-2395000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	893000	USD
CY2017	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	2649000	USD
CY2019	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	-1682000	USD
CY2018	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	3978000	USD
CY2017	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	-1396000	USD
CY2019	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-206000	USD
CY2018	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	3838000	USD
CY2017	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	2087000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-3411000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	2539000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	15000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	113403000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	75113000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	51550000	USD
CY2019	chgg	Proceeds From Sale Of Textbooks ProceedsFromSaleOfTextbooks	0	USD
CY2018	chgg	Proceeds From Sale Of Textbooks ProceedsFromSaleOfTextbooks	0	USD
CY2017	chgg	Proceeds From Sale Of Textbooks ProceedsFromSaleOfTextbooks	6943000	USD
CY2019	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	959911000	USD
CY2018	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	146856000	USD
CY2017	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	128247000	USD
CY2019	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	53261000	USD
CY2018	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	1800000	USD
CY2017	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	16393000	USD
CY2019	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	324700000	USD
CY2018	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	138380000	USD
CY2017	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	9750000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	42326000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	31223000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	26142000	USD
CY2019	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	79149000	USD
CY2018	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	34650000	USD
CY2017	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	14931000	USD
CY2019	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	0	USD
CY2018	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	10000000	USD
CY2017	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	0	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-703425000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-82549000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-136234000	USD
CY2019	chgg	Proceeds From Issuance Of Employee Stock Purchase Plan ProceedsFromIssuanceOfEmployeeStockPurchasePlan	35100000	USD
CY2018	chgg	Proceeds From Issuance Of Employee Stock Purchase Plan ProceedsFromIssuanceOfEmployeeStockPurchasePlan	29116000	USD
CY2017	chgg	Proceeds From Issuance Of Employee Stock Purchase Plan ProceedsFromIssuanceOfEmployeeStockPurchasePlan	23659000	USD
CY2019	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	94571000	USD
CY2018	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	49089000	USD
CY2017	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	20115000	USD
CY2019	us-gaap	Payment For Contingent Consideration Liability Financing Activities PaymentForContingentConsiderationLiabilityFinancingActivities	0	USD
CY2018	us-gaap	Payment For Contingent Consideration Liability Financing Activities PaymentForContingentConsiderationLiabilityFinancingActivities	0	USD
CY2017	us-gaap	Payment For Contingent Consideration Liability Financing Activities PaymentForContingentConsiderationLiabilityFinancingActivities	16939000	USD
CY2019	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	USD
CY2018	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	USD
CY2017	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	147609000	USD
CY2019	us-gaap	Proceeds From Debt Net Of Issuance Costs ProceedsFromDebtNetOfIssuanceCosts	780180000	USD
CY2018	us-gaap	Proceeds From Debt Net Of Issuance Costs ProceedsFromDebtNetOfIssuanceCosts	335618000	USD
CY2017	us-gaap	Proceeds From Debt Net Of Issuance Costs ProceedsFromDebtNetOfIssuanceCosts	0	USD
CY2019	chgg	Payments For Convertible Senior Notes Capped Call PaymentsForConvertibleSeniorNotesCappedCall	97200000	USD
CY2018	chgg	Payments For Convertible Senior Notes Capped Call PaymentsForConvertibleSeniorNotesCappedCall	39227000	USD
CY2017	chgg	Payments For Convertible Senior Notes Capped Call PaymentsForConvertibleSeniorNotesCappedCall	0	USD
CY2019	chgg	Payments For Repurchase Of Common Stock And Vested Stock Options PaymentsForRepurchaseOfCommonStockAndVestedStockOptions	20000000	USD
CY2018	chgg	Payments For Repurchase Of Common Stock And Vested Stock Options PaymentsForRepurchaseOfCommonStockAndVestedStockOptions	20000000	USD
CY2017	chgg	Payments For Repurchase Of Common Stock And Vested Stock Options PaymentsForRepurchaseOfCommonStockAndVestedStockOptions	0	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	603509000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	256418000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	134214000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	13487000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	248982000	USD
CY2017	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	49530000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	375945000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	126963000	USD
CY2016Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	77433000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	389432000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	375945000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	126963000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	1332000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	605000	USD
CY2017	us-gaap	Interest Paid Net InterestPaidNet	85000	USD
CY2019	us-gaap	Income Taxes Paid IncomeTaxesPaid	2070000	USD
CY2018	us-gaap	Income Taxes Paid IncomeTaxesPaid	2097000	USD
CY2017	us-gaap	Income Taxes Paid IncomeTaxesPaid	1790000	USD
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	5297000	USD
CY2018	us-gaap	Operating Lease Payments OperatingLeasePayments	0	USD
CY2017	us-gaap	Operating Lease Payments OperatingLeasePayments	0	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	3364000	USD
CY2018	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	0	USD
CY2017	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	0	USD
CY2019	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	10036000	USD
CY2018	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	1210000	USD
CY2019	chgg	Issuance Of Common Stock Related To Prior Acquisition IssuanceOfCommonStockRelatedToPriorAcquisition	3003000	USD
CY2018	chgg	Issuance Of Common Stock Related To Prior Acquisition IssuanceOfCommonStockRelatedToPriorAcquisition	0	USD
CY2017	chgg	Issuance Of Common Stock Related To Prior Acquisition IssuanceOfCommonStockRelatedToPriorAcquisition	0	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	387520000	USD
CY2017	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	3573000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	374664000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	126457000	USD
CY2019Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	149000	USD
CY2018Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	84000	USD
CY2017Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	84000	USD
CY2019Q4	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	1763000	USD
CY2018Q4	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	1197000	USD
CY2017Q4	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	422000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	389432000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	375945000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	126963000	USD
CY2019	us-gaap	Use Of Estimates UseOfEstimates	<div style="line-height:120%;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:120%;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Use of Estimates</span></div><div style="line-height:120%;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div><div style="line-height:120%;text-indent:36px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">The preparation of financial statements in conformity with generally accepted accounting principles in the United States (U.S. GAAP) requires management to make estimates, judgments, and assumptions that affect the reported amounts of assets and liabilities; the disclosure of contingent liabilities at the date of the financial statements; and the reported amounts of revenues and expenses during the reporting periods. Significant estimates, assumptions, and judgments are used for, but not limited to: revenue recognition, recoverability of accounts receivable, restructuring charges, share-based compensation expense including estimated forfeitures, accounting for income taxes, useful lives assigned to long-lived assets for depreciation and amortization, impairment of goodwill and long-lived assets, the valuation of acquired intangible assets, the valuation of our convertible senior notes, internal-use software and website development costs, and operating lease right of use (ROU) assets and operating lease liabilities. We base our estimates on historical experience, knowledge of current business conditions, and various other factors we believe to be reasonable under the circumstances. These estimates are based on management’s knowledge about current events and expectations about actions we may undertake in the future. Actual results could differ from these estimates, and such differences could be material to our financial position and results of operations.</span></div><div style="line-height:120%;text-align:left;text-indent:36px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div>
CY2019	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div style="line-height:120%;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Concentration of Credit Risk<br/> <br/></span></div><div style="line-height:120%;text-indent:36px;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Financial instruments that potentially subject us to concentrations of credit risk consist primarily of cash and cash equivalents, restricted cash, and investments in highly liquid instruments in accordance with our investment policy. We place the majority of our cash and cash equivalents and restricted cash with financial institutions in the United States that we believe to be of high credit quality, and accordingly minimal credit risk exists with respect to these instruments. Certain of our cash balances held with a financial institution are in excess of Federal Deposit Insurance Corporation limits. Our investment portfolio consists of investments diversified among security types, industries and issuers. Our investments were held and managed by recognized financial institutions that followed our investment policy with the main objective of preserving capital and maintaining liquidity.<br/> <br/></span></div>C
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	24200000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	16800000	USD
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	13800000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	214500000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	149500000	USD
CY2019	us-gaap	Advertising Expense AdvertisingExpense	24400000	USD
CY2018	us-gaap	Advertising Expense AdvertisingExpense	17900000	USD
CY2017	us-gaap	Advertising Expense AdvertisingExpense	16500000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-9605000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	-14888000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	-20283000	USD
CY2019	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	119204000	shares
CY2018	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	113251000	shares
CY2017	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	100022000	shares
CY2019	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.08
CY2018	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.13
CY2017	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.20
CY2019	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	10620000	shares
CY2018	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	11991000	shares
CY2017	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	3203000	shares
CY2019	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	410926000	USD
CY2018	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	321084000	USD
CY2017	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	255066000	USD
CY2019	chgg	Revenuefrom Contractwith Customer Including Assessed Tax Increase Decrease RevenuefromContractwithCustomerIncludingAssessedTaxIncreaseDecrease	89842000	USD
CY2019	chgg	Revenuefrom Contractwith Customer Including Assessed Tax Increase Decrease Percent RevenuefromContractwithCustomerIncludingAssessedTaxIncreaseDecreasePercent	0.28
CY2018	chgg	Revenuefrom Contractwith Customer Including Assessed Tax Increase Decrease RevenuefromContractwithCustomerIncludingAssessedTaxIncreaseDecrease	66018000	USD
CY2018	chgg	Revenuefrom Contractwith Customer Including Assessed Tax Increase Decrease Percent RevenuefromContractwithCustomerIncludingAssessedTaxIncreaseDecreasePercent	0.26
CY2019	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	17000000.0	USD
CY2018	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	11700000	USD
CY2019	chgg	Contract With Customer Liability Revenue Recognized Prior Period ContractWithCustomerLiabilityRevenueRecognizedPriorPeriod	3400000	USD
CY2019Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	18800000	USD
CY2019Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	11529000	USD
CY2018Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	12733000	USD
CY2019	chgg	Increase Decrease In Accounts Receivable Net IncreaseDecreaseInAccountsReceivableNet	-1204000	USD
CY2019	chgg	Increase Decreasein Accounts Receivable Percent IncreaseDecreaseinAccountsReceivablePercent	-0.09
CY2019Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	18780000	USD
CY2018Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	17418000	USD
CY2019	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	1362000	USD
CY2019	chgg	Increase Decreasein Contractwith Customer Liability Percent IncreaseDecreaseinContractwithCustomerLiabilityPercent	0.08
CY2019Q4	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	3531000	USD
CY2018Q4	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	337000	USD
CY2019	chgg	Increase Decrease In Contract With Customer Assets IncreaseDecreaseInContractWithCustomerAssets	3194000	USD
CY2019	chgg	Increase Decrease In Accounts Receivable Net IncreaseDecreaseInAccountsReceivableNet	-1200000	USD
CY2019	chgg	Increase Decreasein Accounts Receivable Percent IncreaseDecreaseinAccountsReceivablePercent	-0.09
CY2019	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	1400000	USD
CY2019	chgg	Increase Decreasein Contractwith Customer Liability Percent IncreaseDecreaseinContractwithCustomerLiabilityPercent	0.08
CY2019	chgg	Increase Decrease In Contract With Customer Assets IncreaseDecreaseInContractWithCustomerAssets	3200000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	380686000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	381074000	USD
CY2019Q4	chgg	Availableforsale Securities Debt Maturities Year One Through Two Amortized Cost Basis AvailableforsaleSecuritiesDebtMaturitiesYearOneThroughTwoAmortizedCostBasis	310102000	USD
CY2019Q4	chgg	Availableforsale Securities Debt Maturities Year One Through Two Fair Value AvailableforsaleSecuritiesDebtMaturitiesYearOneThroughTwoFairValue	310483000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost	146165000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue	146165000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	836953000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	837722000	USD
CY2018Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	10000000.0	USD
CY2019Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	154955000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	115078000	USD
CY2019Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	67596000	USD
CY2018Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	55174000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	87359000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	59904000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	149524000	USD
CY2017Q4	us-gaap	Goodwill Goodwill	125272000	USD
CY2019	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	65181000	USD
CY2018	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	24673000	USD
CY2019	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	-192000	USD
CY2018	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	-421000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	214513000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	149524000	USD
CY2019Q4	us-gaap	Indefinite Lived Trade Names IndefiniteLivedTradeNames	3600000	USD
CY2019	chgg	Finite Lived And Indefinite Lived Intangible Assets Foreign Currency Translation Gain Loss FiniteLivedAndIndefiniteLivedIntangibleAssetsForeignCurrencyTranslationGainLoss	-398000	USD
CY2019	chgg	Finite Lived And Indefinite Lived Intangible Assets Foreign Currency Translation Gain Loss FiniteLivedAndIndefiniteLivedIntangibleAssetsForeignCurrencyTranslationGainLoss	-398000	USD
CY2019	us-gaap	Finite Lived Intangible Asset Useful Life FiniteLivedIntangibleAssetUsefulLife	P58M
CY2019Q4	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	69331000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	34664000	USD
CY2019Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	34667000	USD
CY2018Q4	us-gaap	Indefinite Lived Trade Names IndefiniteLivedTradeNames	3600000	USD
CY2018Q4	us-gaap	Indefinite Lived Trade Names IndefiniteLivedTradeNames	3600000	USD
CY2018	chgg	Finite Lived And Indefinite Lived Intangible Assets Foreign Currency Translation Gain Loss FiniteLivedAndIndefiniteLivedIntangibleAssetsForeignCurrencyTranslationGainLoss	-271000	USD
CY2018	chgg	Finite Lived And Indefinite Lived Intangible Assets Foreign Currency Translation Gain Loss FiniteLivedAndIndefiniteLivedIntangibleAssetsForeignCurrencyTranslationGainLoss	-271000	USD
CY2018	us-gaap	Finite Lived Intangible Asset Useful Life FiniteLivedIntangibleAssetUsefulLife	P61M
CY2018Q4	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	53097000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	27182000	USD
CY2018Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	25915000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	8947000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	7554000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	6686000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	4557000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	2411000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	912000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	31067000	USD
CY2019Q4	us-gaap	Receivables Long Term Contracts Or Programs ReceivablesLongTermContractsOrPrograms	6552000	USD
CY2018Q4	us-gaap	Receivables Long Term Contracts Or Programs ReceivablesLongTermContractsOrPrograms	3785000	USD
CY2019Q4	us-gaap	Other Assets Miscellaneous Current OtherAssetsMiscellaneousCurrent	10054000	USD
CY2018Q4	us-gaap	Other Assets Miscellaneous Current OtherAssetsMiscellaneousCurrent	5725000	USD
CY2019Q4	us-gaap	Other Assets Current OtherAssetsCurrent	16606000	USD
CY2018Q4	us-gaap	Other Assets Current OtherAssetsCurrent	9510000	USD
CY2019Q4	srt	Payables To Customers PayablesToCustomers	4898000	USD
CY2018Q4	srt	Payables To Customers PayablesToCustomers	6420000	USD
CY2019Q4	chgg	Acquisition Related Compensation Liability AcquisitionRelatedCompensationLiability	4042000	USD
CY2018Q4	chgg	Acquisition Related Compensation Liability AcquisitionRelatedCompensationLiability	8536000	USD
CY2019Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	3046000	USD
CY2018Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	3864000	USD
CY2019Q4	chgg	Accrued Purchases Of Long Lived Assets AccruedPurchasesOfLongLivedAssets	10036000	USD
CY2018Q4	chgg	Accrued Purchases Of Long Lived Assets AccruedPurchasesOfLongLivedAssets	1210000	USD
CY2019Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	17942000	USD
CY2018Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	14047000	USD
CY2019Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	39964000	USD
CY2018Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	34077000	USD
CY2019	dei	Document Period End Date DocumentPeriodEndDate	2019-12-31
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	15900000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	19800000	USD
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P3Y8M12D
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.047
CY2019	us-gaap	Lease Cost LeaseCost	5000000.0	USD
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	16800000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	6094000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	5622000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	5404000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	3738000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	780000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	21638000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	1842000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	19796000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	5222000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	5251000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	4775000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	3999000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	3421000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	788000	USD
CY2018Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	23456000	USD
CY2019Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	400000000	shares
CY2019Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	1611385	shares
CY2019Q4	us-gaap	Common Stock Capital Shares Reserved For Future Issuance CommonStockCapitalSharesReservedForFutureIssuance	39572722	shares
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	64909000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	52030000	USD
CY2017	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	38359000	USD
CY2019	us-gaap	Stock Issued During Period Shares Employee Stock Purchase Plans StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans	201581	shares
CY2019	chgg	Employee Stock Purchase Plan Espp Weighted Average Purchase Priceof Shares Purchased EmployeeStockPurchasePlanESPPWeightedAveragePurchasePriceofSharesPurchased	25.55
CY2018	us-gaap	Stock Issued During Period Shares Employee Stock Purchase Plans StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans	253301	shares
CY2018	chgg	Employee Stock Purchase Plan Espp Weighted Average Purchase Priceof Shares Purchased EmployeeStockPurchasePlanESPPWeightedAveragePurchasePriceofSharesPurchased	15.77
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	4776481	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	9.40
CY2018	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P4Y3M
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	90848450	USD
CY2019	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	3165096	shares
CY2019	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	9.79
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	1611385	shares
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	8.64
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P3Y7M6D
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	47171160	USD
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	90800000	USD
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	57200000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2600000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1400000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1800000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-185000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-91000	USD
CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-103000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	264000	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	-73000	USD
CY2017	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	100000	USD
CY2019	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	2594000	USD
CY2018	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	1374000	USD
CY2017	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	1523000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	2673000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	1210000	USD
CY2017	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	1520000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-17000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	155000	USD
CY2017	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-992000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	42000	USD
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	76000	USD
CY2017	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	75000	USD
CY2019	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-64000	USD
CY2018	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-11000	USD
CY2017	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	1199000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-39000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	220000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	282000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2634000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1430000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1802000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-12497000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-18617000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-20983000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	5526000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	5159000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	2502000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-6971000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-13458000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-18481000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.340
CY2019	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	-0.763
CY2018	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.148
CY2017	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.083
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.194
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.030
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.038
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	6.954
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	1.787
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	0.382
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Other EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther	0.004
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Other EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther	-0.044
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Other EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther	-0.011
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	-0.193
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	-0.267
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	-0.078
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	-2.202
CY2019	chgg	Effective Income Tax Rate Reconciliation Acquisition Percent EffectiveIncomeTaxRateReconciliationAcquisitionPercent	0.318
CY2018	chgg	Effective Income Tax Rate Reconciliation Acquisition Percent EffectiveIncomeTaxRateReconciliationAcquisitionPercent	0.152
CY2017	chgg	Effective Income Tax Rate Reconciliation Acquisition Percent EffectiveIncomeTaxRateReconciliationAcquisitionPercent	0
CY2019	chgg	Effective Income Tax Rate Reconciliation Convertible Senior Notes Percent EffectiveIncomeTaxRateReconciliationConvertibleSeniorNotesPercent	-4.126
CY2018	chgg	Effective Income Tax Rate Reconciliation Convertible Senior Notes Percent EffectiveIncomeTaxRateReconciliationConvertibleSeniorNotesPercent	-0.003
CY2017	chgg	Effective Income Tax Rate Reconciliation Convertible Senior Notes Percent EffectiveIncomeTaxRateReconciliationConvertibleSeniorNotesPercent	0
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.279
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.018
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.004
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-3.253
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-2.575
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	1.266
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.378
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.106
CY2017	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.098
CY2019	us-gaap	Tax Cuts And Jobs Act Of2017 Incomplete Accounting Transition Tax For Accumulated Foreign Earnings Provisional Income Tax Expense TaxCutsAndJobsActOf2017IncompleteAccountingTransitionTaxForAccumulatedForeignEarningsProvisionalIncomeTaxExpense	-100000	USD
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CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	13083000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	997000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	2075000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	162320000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	106659000	USD
CY2019Q4	chgg	Deferred Tax Assets Property Plantand Equipment Inventoryand Intangible Assets DeferredTaxAssetsPropertyPlantandEquipmentInventoryandIntangibleAssets	0	USD
CY2018Q4	chgg	Deferred Tax Assets Property Plantand Equipment Inventoryand Intangible Assets DeferredTaxAssetsPropertyPlantandEquipmentInventoryandIntangibleAssets	3745000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	3438000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	2951000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	182736000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	130174000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	148519000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	125844000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	34217000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	4330000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	4111000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	0	USD
CY2019Q4	chgg	Deferred Tax Liabilities Convertible Senior Notes DeferredTaxLiabilitiesConvertibleSeniorNotes	27065000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	4661000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	5943000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	35837000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	5989000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	1620000	USD
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CY2018	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	34700000	USD
CY2019	chgg	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense Increase Decrease UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpenseIncreaseDecrease	45000	USD
CY2018	chgg	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense Increase Decrease UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpenseIncreaseDecrease	-700000	USD
CY2017	chgg	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense Increase Decrease UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpenseIncreaseDecrease	200000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	100000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	73000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	8771000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	5772000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	4882000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	221000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	758000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	280000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	1550000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	569000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	101000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	USD
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	149000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	172000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	164000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	103000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	169000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	3722000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	3112000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	978000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Foreign Currency Translation UnrecognizedTaxBenefitsDecreasesResultingFromForeignCurrencyTranslation	7000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	8771000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	5772000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	1900000	USD
CY2017Q4	us-gaap	Restructuring Reserve RestructuringReserve	265000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Foreign Currency Translation UnrecognizedTaxBenefitsDecreasesResultingFromForeignCurrencyTranslation	50000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Foreign Currency Translation UnrecognizedTaxBenefitsIncreasesResultingFromForeignCurrencyTranslation	74000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	10993000	USD
CY2018	us-gaap	Restructuring Charges RestructuringCharges	589000	USD
CY2018	us-gaap	Payments For Restructuring PaymentsForRestructuring	388000	USD
CY2018	us-gaap	Restructuring Reserve Accrual Adjustment1 RestructuringReserveAccrualAdjustment1	-18000	USD
CY2018Q4	us-gaap	Restructuring Reserve RestructuringReserve	448000	USD
CY2019	us-gaap	Restructuring Charges RestructuringCharges	97000	USD
CY2019	us-gaap	Payments For Restructuring PaymentsForRestructuring	221000	USD
CY2019	us-gaap	Restructuring Reserve Accrual Adjustment1 RestructuringReserveAccrualAdjustment1	0	USD
CY2019Q4	us-gaap	Restructuring Reserve RestructuringReserve	22000	USD
CY2019	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	1700000	USD
CY2018	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	1400000	USD
CY2017	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	1100000	USD
CY2019	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	410926000	USD
CY2019Q1	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	97409000	USD
CY2019Q2	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	93862000	USD
CY2019Q3	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	94151000	USD
CY2018	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	321084000	USD
CY2017	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	255066000	USD
CY2019Q4	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	125504000	USD
CY2019Q1	us-gaap	Gross Profit GrossProfit	74074000	USD
CY2019Q2	us-gaap	Gross Profit GrossProfit	73344000	USD
CY2019Q3	us-gaap	Gross Profit GrossProfit	71987000	USD
CY2019Q4	us-gaap	Gross Profit GrossProfit	99339000	USD
CY2019Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	-1027000	USD
CY2019Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	6815000	USD
CY2019Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	-5057000	USD
CY2019Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	17086000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	-4318000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	-2029000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	-11477000	USD
CY2019Q4	us-gaap	Net Income Loss NetIncomeLoss	8219000	USD
CY2019Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	116730000	shares
CY2019Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	118790000	shares
CY2019Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	120085000	shares
CY2019Q4	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	121151000	shares
CY2019Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	116730000	shares
CY2019Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	118790000	shares
CY2019Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	120085000	shares
CY2019Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	129150000	shares
CY2019Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.04
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.02
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.10
CY2019Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.07
CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.04
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.02
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.10
CY2019Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.06
CY2018Q1	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	76949000	USD
CY2018Q2	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	74222000	USD
CY2018Q3	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	74237000	USD
CY2018Q4	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	95676000	USD
CY2018Q1	us-gaap	Gross Profit GrossProfit	56725000	USD
CY2018Q2	us-gaap	Gross Profit GrossProfit	56438000	USD
CY2018Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	-10433000	USD
CY2018Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	7544000	USD
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	-3909000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	-13709000	USD
CY2018Q4	us-gaap	Net Income Loss NetIncomeLoss	5347000	USD
CY2018Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	110904000	shares
CY2018Q3	us-gaap	Gross Profit GrossProfit	54319000	USD
CY2018Q4	us-gaap	Gross Profit GrossProfit	73606000	USD
CY2018Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	-2620000	USD
CY2018Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	-711000	USD
CY2018Q1	us-gaap	Net Income Loss NetIncomeLoss	-2617000	USD
CY2018Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	112738000	shares
CY2018Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	114184000	shares
CY2018Q4	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	115123000	shares
CY2018Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	110904000	shares
CY2018Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	112738000	shares
CY2018Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	114184000	shares
CY2018Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	125610000	shares
CY2018Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.02
CY2018Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.03
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.12
CY2018Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.05
CY2018Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.02
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.03
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.12
CY2018Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.04

Files In Submission

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$CHGG
CHEGG, INC Stock $chgg

2019 Form 10-K Financial Statement

#000136495420000041 Filed on February 20, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CHGG CHEGG, INC Stock $chgg

2019 Form 10-K Financial Statement

#000136495420000041 Filed on February 20, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CHGG
CHEGG, INC Stock $chgg