$CHGG
CHEGG, INC Stock $chgg

$chgg Overview Financials Valuation SEC Filings Company Website

2020 Q4 Form 10-K Financial Statement

#000136495421000013 Filed on February 22, 2021

Income Statement

Concept	2020 Q4	2020 Q1	2020
Revenue	$205.7M	$131.6M	$644.3M
YoY Change	63.92%	35.09%	56.8%
Cost Of Revenue	$57.10M	$42.39M	$205.4M
YoY Change	117.94%	81.66%	122.84%
Gross Profit	$148.6M	$89.20M	$438.9M
YoY Change	49.58%	20.42%	37.7%
Gross Profit Margin	72.23%	67.79%	68.12%
Selling, General & Admin	$52.40M	$46.38M	$211.3M
YoY Change	19.91%	9.43%	31.09%
% of Gross Profit	35.27%	52.0%	48.13%
Research & Development	$46.90M	$39.54M	$170.9M
YoY Change	21.5%	20.95%	22.27%
% of Gross Profit	31.56%	44.33%	38.94%
Depreciation & Amortization	$18.60M	$12.80M	$32.60M
YoY Change	111.36%	88.24%	34.71%
% of Gross Profit	12.52%	14.35%	7.43%
Operating Expenses	$99.40M	$85.92M	$382.2M
YoY Change	20.92%	14.41%	27.0%
Operating Profit	$49.22M	$3.276M	$56.75M
YoY Change	188.06%	-418.99%	218.53%
Interest Expense	-$22.00M	$4.856M	$12.78M
YoY Change	61.76%	-215.62%	-34.73%
% of Operating Profit	-44.7%	148.23%	22.52%
Other Income/Expense, Net	$2.300M	-$8.467M	-$57.61M
YoY Change	-58.18%	217.71%	132.43%
Pretax Income	$28.50M	-$5.191M	-$861.0K
YoY Change	216.67%	40.6%	-87.65%
Income Tax	$2.500M	$522.0K	$5.360M
% Of Pretax Income	8.77%
Net Earnings	$26.04M	-$5.713M	-$6.221M
YoY Change	216.86%	32.31%	-35.23%
Net Earnings / Revenue	12.66%	-4.34%	-0.97%
Basic Earnings Per Share	$0.20	-$0.05	-$0.05
Diluted Earnings Per Share	$0.18	-$0.05	-$0.05
COMMON SHARES
Basic Shares Outstanding	129.0M shares	122.4M shares	125.4M shares
Diluted Shares Outstanding	141.3M shares	122.4M shares	125.4M shares

Balance Sheet

Concept	2020 Q4	2020 Q1	2020
SHORT-TERM ASSETS
Cash & Short-Term Investments	$1.145B	$763.9M	$1.145B
YoY Change	49.02%	-22.42%	49.02%
Cash & Equivalents	$479.9M	$359.1M	$464.8M
Short-Term Investments	$665.6M	$404.8M	$665.6M
Other Short-Term Assets	$11.85M	$19.53M	$24.60M
YoY Change	-28.66%	101.51%	-9.23%
Inventory
Prepaid Expenses	$12.78M	$17.85M
Receivables	$12.91M	$6.493M	$12.90M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$1.183B	$807.8M	$1.183B
YoY Change	46.54%	-20.72%	46.54%
LONG-TERM ASSETS
Property, Plant & Equipment	$125.8M	$97.89M	$184.2M
YoY Change	44.01%	34.21%	78.32%
Goodwill	$285.2M	$214.3M
YoY Change	32.96%	43.38%
Intangibles	$51.25M	$32.08M
YoY Change	47.83%	33.11%
Long-Term Investments	$523.6M	$273.1M	$523.6M
YoY Change	68.63%	2084.8%	68.63%
Other Assets	$24.03M	$23.55M	$24.00M
YoY Change	27.97%	52.83%	27.66%
Total Long-Term Assets	$1.068B	$687.2M	$1.068B
YoY Change	56.7%	136.7%	56.71%
TOTAL ASSETS
Total Short-Term Assets	$1.183B	$807.8M	$1.183B
Total Long-Term Assets	$1.068B	$687.2M	$1.068B
Total Assets	$2.251B	$1.495B	$2.251B
YoY Change	51.19%	14.19%	51.2%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$8.547M	$13.61M	$8.500M
YoY Change	16.1%	114.56%	14.86%
Accrued Expenses	$68.57M	$47.24M	$62.40M
YoY Change	71.57%	32.31%	47.87%
Deferred Revenue	$32.62M	$35.75M
YoY Change	73.7%	36.07%
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$109.7M	$101.8M	$109.7M
YoY Change	53.71%	39.57%	53.64%
LONG-TERM LIABILITIES
Long-Term Debt	$1.507B	$913.2M	$1.507B
YoY Change	67.38%	15.68%	67.38%
Other Long-Term Liabilities	$5.705M	$3.983M	$25.00M
YoY Change	43.92%	20.3%	35.14%
Total Long-Term Liabilities	$1.532B	$930.2M	$1.532B
YoY Change	66.73%	15.11%	66.73%
TOTAL LIABILITIES
Total Short-Term Liabilities	$109.7M	$101.8M	$109.7M
Total Long-Term Liabilities	$1.532B	$930.2M	$1.532B
Total Liabilities	$1.642B	$1.032B	$1.642B
YoY Change	65.79%	17.14%	65.78%
SHAREHOLDERS EQUITY
Retained Earnings	-$422.6M	-$422.1M
YoY Change	1.52%	2.7%
Common Stock	$1.031B	$890.4M
YoY Change	12.5%	5.99%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$609.6M	$462.9M	$609.6M
YoY Change
Total Liabilities & Shareholders Equity	$2.251B	$1.495B	$2.251B
YoY Change	51.19%	14.19%	51.2%

Cashflow Statement

Concept	2020 Q4	2020 Q1	2020
OPERATING ACTIVITIES
Net Income	$26.04M	-$5.713M	-$6.221M
YoY Change	216.86%	32.31%	-35.23%
Depreciation, Depletion And Amortization	$18.60M	$12.80M	$32.60M
YoY Change	111.36%	88.24%	34.71%
Cash From Operating Activities	$67.70M	$62.97M	$236.4M
YoY Change	152.61%	250.97%	108.5%
INVESTING ACTIVITIES
Capital Expenditures	-$32.80M	$19.97M	$81.32M
YoY Change	203.7%	42.0%	92.12%
Acquisitions		$0.00	$92.80M
YoY Change			17.24%
Other Investing Activities	$50.90M	$9.500M	-$592.9M
YoY Change	-161.92%	-65.07%	-10.32%
Cash From Investing Activities	$18.10M	-$47.26M	-$732.8M
YoY Change	-119.46%	-458.78%	4.17%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net		$0.00	$0.00
YoY Change		-100.0%	-100.0%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-133.8M	-$44.17M	$588.6M
YoY Change	-3530.77%	-108.69%	-2.47%
NET CHANGE
Cash From Operating Activities	67.70M	$62.97M	$236.4M
Cash From Investing Activities	18.10M	-$47.26M	-$732.8M
Cash From Financing Activities	-133.8M	-$44.17M	$588.6M
Net Change In Cash	-48.00M	-$28.46M	$92.28M
YoY Change	-22.95%	-105.28%	584.24%
FREE CASH FLOW
Cash From Operating Activities	$67.70M	$62.97M	$236.4M
Capital Expenditures	-$32.80M	$19.97M	$81.32M
Free Cash Flow	$100.5M	$43.00M	$155.1M
YoY Change	167.29%	1008.01%	118.25%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2020	dei	Entity Central Index Key EntityCentralIndexKey	0001364954
CY2020	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
CY2020	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2020	dei	Amendment Flag AmendmentFlag	false
CY2018	us-gaap	Accounting Standards Update Extensible List AccountingStandardsUpdateExtensibleList	us-gaap:AccountingStandardsUpdate201602Member
CY2019	us-gaap	Accounting Standards Update Extensible List AccountingStandardsUpdateExtensibleList	us-gaap:AccountingStandardsUpdate201613Member
CY2020	dei	Document Type DocumentType	10-K
CY2020	dei	Document Annual Report DocumentAnnualReport	true
CY2020	dei	Document Period End Date DocumentPeriodEndDate	2020-12-31
CY2020	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2020	dei	Document Transition Report DocumentTransitionReport	false
CY2020	dei	Entity File Number EntityFileNumber	001-36180
CY2020	dei	Entity Registrant Name EntityRegistrantName	CHEGG, INC
CY2020	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2020	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	20-3237489
CY2020	dei	Entity Address Address Line1 EntityAddressAddressLine1	3990 Freedom Circle
CY2020	dei	Entity Address City Or Town EntityAddressCityOrTown	Santa Clara
CY2020	dei	Entity Address State Or Province EntityAddressStateOrProvince	CA
CY2020	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	95054
CY2020	dei	City Area Code CityAreaCode	408
CY2020	dei	Local Phone Number LocalPhoneNumber	855-5700
CY2020	dei	Security12b Title Security12bTitle	Common Stock, $0.001 par value per share
CY2020	dei	Trading Symbol TradingSymbol	CHGG
CY2020	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2020	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2020	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2020	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2020	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2020	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2020	dei	Entity Small Business EntitySmallBusiness	false
CY2020	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2020	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2020	dei	Entity Shell Company EntityShellCompany	false
CY2020Q2	dei	Entity Public Float EntityPublicFloat	8183064276	USD
CY2021Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	129423416	shares
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	479853000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	387520000	USD
CY2020Q4	us-gaap	Short Term Investments ShortTermInvestments	665567000	USD
CY2019Q4	us-gaap	Short Term Investments ShortTermInvestments	381074000	USD
CY2020Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	153000	USD
CY2019Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	56000	USD
CY2020Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	12913000	USD
CY2019Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	11529000	USD
CY2020Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	12776000	USD
CY2019Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	10538000	USD
CY2020Q4	us-gaap	Other Assets Current OtherAssetsCurrent	11846000	USD
CY2019Q4	us-gaap	Other Assets Current OtherAssetsCurrent	16606000	USD
CY2020Q4	us-gaap	Assets Current AssetsCurrent	1182955000	USD
CY2019Q4	us-gaap	Assets Current AssetsCurrent	807267000	USD
CY2020Q4	us-gaap	Long Term Investments LongTermInvestments	523628000	USD
CY2019Q4	us-gaap	Long Term Investments LongTermInvestments	310483000	USD
CY2020Q4	chgg	Textbook Library Net TextbookLibraryNet	34149000	USD
CY2019Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	400000000	shares
CY2020Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	400000000	shares
CY2019Q4	chgg	Textbook Library Net TextbookLibraryNet	0	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	125807000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	87359000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	285214000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	214513000	USD
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CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	24226000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	15931000	USD
CY2020Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	24030000	USD
CY2019Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	18778000	USD
CY2020Q4	us-gaap	Assets Assets	2251258000	USD
CY2019Q4	us-gaap	Assets Assets	1488998000	USD
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CY2020Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	32620000	USD
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CY2020Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	6603000	USD
CY2019Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	5283000	USD
CY2020Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	61962000	USD
CY2019Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	39964000	USD
CY2020Q4	us-gaap	Liabilities Current LiabilitiesCurrent	109732000	USD
CY2019Q4	us-gaap	Liabilities Current LiabilitiesCurrent	71389000	USD
CY2020Q4	us-gaap	Senior Long Term Notes SeniorLongTermNotes	1506922000	USD
CY2019Q4	us-gaap	Senior Long Term Notes SeniorLongTermNotes	900303000	USD
CY2020Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	19264000	USD
CY2019Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	14513000	USD
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CY2020Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	1531891000	USD
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CY2020Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2019Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
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CY2019Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
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CY2020Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
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CY2019Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	121583501	shares
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CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1430000	USD
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CY2020	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	125367000	shares
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CY2018	us-gaap	Adjustments To Additional Paid In Capital Equity Component Of Convertible Debt AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt	62444000	USD
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CY2019	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	668000	USD
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CY2018	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-813000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	2626000	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
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-3595000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-9682000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-15625000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	391062000	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
CY2020	us-gaap	Adjustments To Additional Paid In Capital Equity Component Of Convertible Debt AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt	237462000	USD
CY2020	chgg	Adjustments To Additional Paid In Capital Purchase Of Capped Call AdjustmentsToAdditionalPaidInCapitalPurchaseOfCappedCall	103400000	USD
CY2020	us-gaap	Adjustments To Additional Paid In Capital Equity Component Of Convertible Debt Subsequent Adjustments AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebtSubsequentAdjustments	442667000	USD
CY2020	us-gaap	Stock Issued During Period Value Conversion Of Convertible Securities StockIssuedDuringPeriodValueConversionOfConvertibleSecurities	327141000	USD
CY2020	chgg	Adjustments To Additional Paid In Capital Proceeds From Capped Call AdjustmentsToAdditionalPaidInCapitalProceedsFromCappedCall	77095000	USD
CY2020	chgg	Stock Issued During Period Value Employee Stock Purchase Planand Stock Options Exercised StockIssuedDuringPeriodValueEmployeeStockPurchasePlanandStockOptionsExercised	15481000	USD
CY2020	us-gaap	Stock Issued During Period Value Restricted Stock Award Gross StockIssuedDuringPeriodValueRestrictedStockAwardGross	-80678000	USD
CY2020	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	84055000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	2626000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-6221000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	609635000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-6221000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-9605000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	-14888000	USD
CY2020	chgg	Depreciation Textbook Library DepreciationTextbookLibrary	15397000	USD
CY2019	chgg	Depreciation Textbook Library DepreciationTextbookLibrary	0	USD
CY2018	chgg	Depreciation Textbook Library DepreciationTextbookLibrary	0	USD
CY2020	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	47018000	USD
CY2019	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	30247000	USD
CY2018	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	22805000	USD
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	84055000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	64909000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	52030000	USD
CY2020	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	64573000	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
CY2020	chgg	Repayments Of Convertible Senior Notes Attributable To Debt Discount RepaymentsOfConvertibleSeniorNotesAttributableToDebtDiscount	20433000	USD
CY2019	chgg	Repayments Of Convertible Senior Notes Attributable To Debt Discount RepaymentsOfConvertibleSeniorNotesAttributableToDebtDiscount	0	USD
CY2018	chgg	Repayments Of Convertible Senior Notes Attributable To Debt Discount RepaymentsOfConvertibleSeniorNotesAttributableToDebtDiscount	0	USD
CY2020	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-4286000	USD
CY2019	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2018	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2020	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	1211000	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
CY2020	us-gaap	Equity Method Investment Other Than Temporary Impairment EquityMethodInvestmentOtherThanTemporaryImpairment	10000000	USD
CY2019	us-gaap	Equity Method Investment Other Than Temporary Impairment EquityMethodInvestmentOtherThanTemporaryImpairment	0	USD
CY2018	us-gaap	Equity Method Investment Other Than Temporary Impairment EquityMethodInvestmentOtherThanTemporaryImpairment	0	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
CY2020	chgg	Deferred Income Tax Expense Benefit Acquisitions DeferredIncomeTaxExpenseBenefitAcquisitions	-109000	USD
CY2019	chgg	Deferred Income Tax Expense Benefit Acquisitions DeferredIncomeTaxExpenseBenefitAcquisitions	-39000	USD
CY2018	chgg	Deferred Income Tax Expense Benefit Acquisitions DeferredIncomeTaxExpenseBenefitAcquisitions	-323000	USD
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	4901000	USD
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	4385000	USD
CY2018	us-gaap	Operating Lease Cost OperatingLeaseCost	0	USD
CY2020	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	118000	USD
CY2019	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	416000	USD
CY2018	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-65000	USD
CY2020	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	400000	USD
CY2019	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-1829000	USD
CY2018	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	1538000	USD
CY2020	us-gaap	Increase Decrease In Prepaid Expenses Other IncreaseDecreaseInPrepaidExpensesOther	-5419000	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
CY2020	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	4214000	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
CY2020	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	1119000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-2395000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	893000	USD
CY2020	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	12918000	USD
CY2019	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	-1682000	USD
CY2018	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	3978000	USD
CY2020	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	22444000	USD
CY2020	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	22444000	USD
CY2019	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	-206000	USD
CY2018	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	3838000	USD
CY2020	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-3951000	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
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	236442000	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
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	81317000	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
CY2020	chgg	Payment To Purchases Textbooks PaymentToPurchasesTextbooks	58567000	USD
CY2019	chgg	Payment To Purchases Textbooks PaymentToPurchasesTextbooks	0	USD
CY2018	chgg	Payment To Purchases Textbooks PaymentToPurchasesTextbooks	0	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
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-732786000	USD
CY2020	chgg	Proceeds From Sale Of Textbooks ProceedsFromSaleOfTextbooks	7569000	USD
CY2019	chgg	Proceeds From Sale Of Textbooks ProceedsFromSaleOfTextbooks	0	USD
CY2018	chgg	Proceeds From Sale Of Textbooks ProceedsFromSaleOfTextbooks	0	USD
CY2020	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	1045564000	USD
CY2019	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	959911000	USD
CY2018	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	146856000	USD
CY2020	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	0	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
CY2020	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	539889000	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
CY2020	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	92796000	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
CY2020	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	2000000	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
CY2020	chgg	Proceeds From Issuance Of Employee Stock Purchase Plan ProceedsFromIssuanceOfEmployeeStockPurchasePlan	15483000	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
CY2020	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	80680000	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
CY2020	us-gaap	Proceeds From Debt Net Of Issuance Costs ProceedsFromDebtNetOfIssuanceCosts	984096000	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
CY2020	chgg	Payments For Convertible Senior Notes Capped Call PaymentsForConvertibleSeniorNotesCappedCall	103400000	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
CY2020	us-gaap	Repayments Of Convertible Debt RepaymentsOfConvertibleDebt	303967000	USD
CY2019	us-gaap	Repayments Of Convertible Debt RepaymentsOfConvertibleDebt	0	USD
CY2018	us-gaap	Repayments Of Convertible Debt RepaymentsOfConvertibleDebt	0	USD
CY2020	us-gaap	Proceeds From Convertible Debt ProceedsFromConvertibleDebt	77095000	USD
CY2019	us-gaap	Proceeds From Convertible Debt ProceedsFromConvertibleDebt	0	USD
CY2018	us-gaap	Proceeds From Convertible Debt ProceedsFromConvertibleDebt	0	USD
CY2020	chgg	Payments For Repurchase Of Common Stock And Vested Stock Options PaymentsForRepurchaseOfCommonStockAndVestedStockOptions	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
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	588627000	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
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	92283000	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
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
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	481715000	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
CY2020	us-gaap	Interest Paid Net InterestPaidNet	1766000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	1332000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	605000	USD
CY2020	us-gaap	Income Taxes Paid IncomeTaxesPaid	3436000	USD
CY2019	us-gaap	Income Taxes Paid IncomeTaxesPaid	2070000	USD
CY2018	us-gaap	Income Taxes Paid IncomeTaxesPaid	2097000	USD
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	6790000	USD
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	5297000	USD
CY2018	us-gaap	Operating Lease Payments OperatingLeasePayments	0	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	13688000	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
CY2020	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	1588000	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
CY2020	chgg	Noncash Or Part Noncash Acquisition Accrued Escrow NoncashOrPartNoncashAcquisitionAccruedEscrow	7451000	USD
CY2019	chgg	Noncash Or Part Noncash Acquisition Accrued Escrow NoncashOrPartNoncashAcquisitionAccruedEscrow	0	USD
CY2018	chgg	Noncash Or Part Noncash Acquisition Accrued Escrow NoncashOrPartNoncashAcquisitionAccruedEscrow	0	USD
CY2020	us-gaap	Stock Issued1 StockIssued1	327141000	USD
CY2019	us-gaap	Stock Issued1 StockIssued1	0	USD
CY2018	us-gaap	Stock Issued1 StockIssued1	0	USD
CY2020	chgg	Issuance Of Common Stock Related To Prior Acquisition IssuanceOfCommonStockRelatedToPriorAcquisition	0	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
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	479853000	USD
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
CY2020Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	122000	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
CY2020Q4	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	1740000	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
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	481715000	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
CY2020	us-gaap	Use Of Estimates UseOfEstimates	<div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Use of Estimates</span></div><div><span><br/></span></div><div style="text-indent:27pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The preparation of financial statements in conformity with generally accepted accounting principles in the United States 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, share-based compensation expense including estimated forfeitures, accounting for income taxes, useful lives and salvage value assigned to our textbook library, 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, 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>
CY2020	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Concentration of Credit Risk</span></div><div><span><br/></span></div><div style="text-indent:27pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">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/></span></div>
CY2020	us-gaap	Advertising Expense AdvertisingExpense	35300000	USD
CY2019	us-gaap	Advertising Expense AdvertisingExpense	24400000	USD
CY2018	us-gaap	Advertising Expense AdvertisingExpense	17900000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-6221000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-9605000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	-14888000	USD
CY2020	us-gaap	Weighted Average Number Of Share Outstanding Basic And Diluted WeightedAverageNumberOfShareOutstandingBasicAndDiluted	125367000	shares
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
CY2020	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.05
CY2019	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.08
CY2018	us-gaap	Earnings Per Share Basic And Diluted EarningsPerShareBasicAndDiluted	-0.13
CY2020	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	9412000	shares
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
CY2020	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	644338000	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
CY2020	chgg	Revenuefrom Contractwith Customer Including Assessed Tax Increase Decrease RevenuefromContractwithCustomerIncludingAssessedTaxIncreaseDecrease	233412000	USD
CY2020	chgg	Revenuefrom Contractwith Customer Including Assessed Tax Increase Decrease Percent RevenuefromContractwithCustomerIncludingAssessedTaxIncreaseDecreasePercent	0.57
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
CY2020	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	18300000	USD
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
CY2020Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	32600000	USD
CY2020Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	12913000	USD
CY2019Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	11529000	USD
CY2020	chgg	Increase Decrease In Accounts Receivable Net IncreaseDecreaseInAccountsReceivableNet	1384000	USD
CY2020	chgg	Increase Decreasein Accounts Receivable Percent IncreaseDecreaseinAccountsReceivablePercent	0.12
CY2020Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	32620000	USD
CY2019Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	18780000	USD
CY2020	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	13840000	USD
CY2020	chgg	Increase Decreasein Contractwith Customer Liability Percent IncreaseDecreaseinContractwithCustomerLiabilityPercent	0.74
CY2020Q4	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	13243000	USD
CY2019Q4	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	3531000	USD
CY2020	chgg	Increase Decrease In Contract With Customer Assets IncreaseDecreaseInContractWithCustomerAssets	9712000	USD
CY2020	chgg	Increase Decrease In Contract With Customer Assets Percent IncreaseDecreaseInContractWithCustomerAssetsPercent	2.75
CY2020	chgg	Increase Decrease In Accounts Receivable Net IncreaseDecreaseInAccountsReceivableNet	1400000	USD
CY2020	chgg	Increase Decreasein Accounts Receivable Percent IncreaseDecreaseinAccountsReceivablePercent	0.12
CY2020	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	13800000	USD
CY2020	chgg	Increase Decreasein Contractwith Customer Liability Percent IncreaseDecreaseinContractwithCustomerLiabilityPercent	0.74
CY2020	chgg	Increase Decrease In Contract With Customer Assets IncreaseDecreaseInContractWithCustomerAssets	9700000	USD
CY2020	chgg	Increase Decrease In Contract With Customer Assets Percent IncreaseDecreaseInContractWithCustomerAssetsPercent	2.75
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	664119000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	665567000	USD
CY2020Q4	chgg	Availableforsale Securities Debt Maturities Year One Through Two Amortized Cost Basis AvailableforsaleSecuritiesDebtMaturitiesYearOneThroughTwoAmortizedCostBasis	523270000	USD
CY2020Q4	chgg	Availableforsale Securities Debt Maturities Year One Through Two Fair Value AvailableforsaleSecuritiesDebtMaturitiesYearOneThroughTwoFairValue	523628000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost	464799000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue	464799000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	1652188000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	1653994000	USD
CY2020	chgg	Available For Sale Securities Weighted Average Maturity AvailableForSaleSecuritiesWeightedAverageMaturity	P12M
CY2020	us-gaap	Equity Method Investment Other Than Temporary Impairment EquityMethodInvestmentOtherThanTemporaryImpairment	10000000.0	USD
CY2020Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	224417000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	154955000	USD
CY2020Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	98610000	USD
CY2019Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	67596000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	125807000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	87359000	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	32600000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	24200000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	16800000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	214513000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	149524000	USD
CY2020	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	70167000	USD
CY2019	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	65181000	USD
CY2020	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	822000	USD
CY2019	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	-192000	USD
CY2020	us-gaap	Goodwill Purchase Accounting Adjustments GoodwillPurchaseAccountingAdjustments	-288000	USD
CY2019	us-gaap	Goodwill Purchase Accounting Adjustments GoodwillPurchaseAccountingAdjustments	0	USD
CY2020Q4	us-gaap	Goodwill Goodwill	285214000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	214513000	USD
CY2020Q4	us-gaap	Indefinite Lived Trade Names IndefiniteLivedTradeNames	3600000	USD
CY2020Q4	us-gaap	Indefinite Lived Trade Names IndefiniteLivedTradeNames	3600000	USD
CY2020	chgg	Finite Lived And Indefinite Lived Intangible Assets Foreign Currency Translation Gain Loss FiniteLivedAndIndefiniteLivedIntangibleAssetsForeignCurrencyTranslationGainLoss	142000	USD
CY2020	chgg	Finite Lived And Indefinite Lived Intangible Assets Foreign Currency Translation Gain Loss FiniteLivedAndIndefiniteLivedIntangibleAssetsForeignCurrencyTranslationGainLoss	142000	USD
CY2020	us-gaap	Finite Lived Intangible Asset Useful Life FiniteLivedIntangibleAssetUsefulLife	P64M
CY2020Q4	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	100191000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	48942000	USD
CY2020Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	51249000	USD
CY2019Q4	us-gaap	Indefinite Lived Trade Names IndefiniteLivedTradeNames	3600000	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
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	13320000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	10889000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	8760000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	5707000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	3893000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	5080000	USD
CY2020Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	47649000	USD
CY2020Q4	chgg	Order Fulfillment Fees Liability Current OrderFulfillmentFeesLiabilityCurrent	11430000	USD
CY2019Q4	chgg	Order Fulfillment Fees Liability Current OrderFulfillmentFeesLiabilityCurrent	6939000	USD
CY2020Q4	chgg	Acquisition Related Compensation Liability AcquisitionRelatedCompensationLiability	9611000	USD
CY2019Q4	chgg	Acquisition Related Compensation Liability AcquisitionRelatedCompensationLiability	4042000	USD
CY2020Q4	chgg	Accrued Escrow Related To Acquisition Current AccruedEscrowRelatedToAcquisitionCurrent	7451000	USD
CY2019Q4	chgg	Accrued Escrow Related To Acquisition Current AccruedEscrowRelatedToAcquisitionCurrent	0	USD
CY2020Q4	chgg	Accrued Content Related Costs Current AccruedContentRelatedCostsCurrent	6273000	USD
CY2019Q4	chgg	Accrued Content Related Costs Current AccruedContentRelatedCostsCurrent	1907000	USD
CY2020Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	6166000	USD
CY2019Q4	us-gaap	Taxes Payable Current TaxesPayableCurrent	3046000	USD
CY2020Q4	chgg	Payment Processing Fees Liability Current PaymentProcessingFeesLiabilityCurrent	2130000	USD
CY2019Q4	chgg	Payment Processing Fees Liability Current PaymentProcessingFeesLiabilityCurrent	1137000	USD
CY2020Q4	chgg	Accrued Purchases Of Long Lived Assets AccruedPurchasesOfLongLivedAssets	1588000	USD
CY2019Q4	chgg	Accrued Purchases Of Long Lived Assets AccruedPurchasesOfLongLivedAssets	10036000	USD
CY2020Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	17313000	USD
CY2019Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	12857000	USD
CY2020Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	61962000	USD
CY2019Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	39964000	USD
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	24200000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	15900000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	25900000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	19800000	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	13700000	USD
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P4Y7M6D
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P3Y8M12D
CY2020Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.048
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.047
CY2020	us-gaap	Lease Cost LeaseCost	5600000	USD
CY2019	us-gaap	Lease Cost LeaseCost	5000000.0	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	7702000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	7590000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	5604000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	2559000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	1823000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	3618000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	28896000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	3029000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	25867000	USD
CY2020Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	400000000	shares
CY2020Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	627317	shares
CY2020Q4	us-gaap	Common Stock Capital Shares Reserved For Future Issuance CommonStockCapitalSharesReservedForFutureIssuance	43289612	shares
CY2020Q2	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	500000000.0	USD
CY2020Q4	us-gaap	Stock Repurchase Program Remaining Authorized Repurchase Amount1 StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1	350400000	USD
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	84055000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	64909000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	52030000	USD
CY2020	us-gaap	Stock Issued During Period Shares Employee Stock Purchase Plans StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans	173992	shares
CY2020	chgg	Employee Stock Purchase Plan Espp Weighted Average Purchase Priceof Shares Purchased EmployeeStockPurchasePlanESPPWeightedAveragePurchasePriceofSharesPurchased	38.85
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
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
CY2020	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	984068	shares
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	9.13
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	627317	shares
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	7.86
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P3Y5M23D
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	51733285	USD
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0	shares
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0	shares
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0	shares
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	53500000	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
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5400000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2600000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1400000	USD
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-185000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-91000	USD
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	459000	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
CY2020	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	5010000	USD
CY2019	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	2594000	USD
CY2018	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	1374000	USD
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	5469000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	2673000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	1210000	USD
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	187000	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
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	255000	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
CY2020	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-551000	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
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-109000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-39000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	220000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5360000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2634000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1430000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-10369000	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
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	9508000	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
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-861000	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
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
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
CY2020	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	-1.695
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
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-2.859
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	-0.03
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	29.015
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
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Other EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther	-0.503
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
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits EffectiveIncomeTaxRateReconciliationTaxCredits	-3.516
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
CY2020	chgg	Effective Income Tax Rate Reconciliation Acquisition Percent EffectiveIncomeTaxRateReconciliationAcquisitionPercent	0
CY2019	chgg	Effective Income Tax Rate Reconciliation Acquisition Percent EffectiveIncomeTaxRateReconciliationAcquisitionPercent	0.318
CY2018	chgg	Effective Income Tax Rate Reconciliation Acquisition Percent EffectiveIncomeTaxRateReconciliationAcquisitionPercent	0.152
CY2020	chgg	Effective Income Tax Rate Reconciliation Convertible Senior Notes Percent EffectiveIncomeTaxRateReconciliationConvertibleSeniorNotesPercent	-58.548
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
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.012
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
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	24.627
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
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-6.225
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.378
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.106
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals	6365000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals	3978000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	6473000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	12003000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	2402000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	997000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	190904000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	162320000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	5734000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	3438000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	211878000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	182736000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	151825000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	148519000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	60053000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	34217000	USD
CY2020Q4	chgg	Deferred Tax Liabilities Property And Equipment Textbooks And Intangible Assets DeferredTaxLiabilitiesPropertyAndEquipmentTextbooksAndIntangibleAssets	4066000	USD
CY2019Q4	chgg	Deferred Tax Liabilities Property And Equipment Textbooks And Intangible Assets DeferredTaxLiabilitiesPropertyAndEquipmentTextbooksAndIntangibleAssets	4111000	USD
CY2020Q4	chgg	Deferred Tax Liabilities Convertible Senior Notes DeferredTaxLiabilitiesConvertibleSeniorNotes	51607000	USD
CY2019Q4	chgg	Deferred Tax Liabilities Convertible Senior Notes DeferredTaxLiabilitiesConvertibleSeniorNotes	27065000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	5890000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	4661000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	61563000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	35837000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	1510000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	1620000	USD
CY2020	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	3300000	USD
CY2019	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	22700000	USD
CY2020	chgg	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense Increase Decrease UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpenseIncreaseDecrease	100000	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
CY2020Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	200000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	100000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	10993000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	8771000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	5772000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	479000	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
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	535000	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
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	208000	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
CY2020	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	26000	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
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	3999000	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
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Foreign Currency Translation UnrecognizedTaxBenefitsDecreasesResultingFromForeignCurrencyTranslation	48000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Foreign Currency Translation UnrecognizedTaxBenefitsDecreasesResultingFromForeignCurrencyTranslation	7000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Foreign Currency Translation UnrecognizedTaxBenefitsDecreasesResultingFromForeignCurrencyTranslation	50000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	14654000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	10993000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	8771000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	3400000	USD
CY2020	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	2200000	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
CY2020	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	644338000	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
CY2020Q1	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	131590000	USD
CY2020Q2	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	153009000	USD
CY2020Q3	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	154018000	USD
CY2020Q4	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	205721000	USD
CY2020Q1	us-gaap	Gross Profit GrossProfit	89200000	USD
CY2020Q2	us-gaap	Gross Profit GrossProfit	109485000	USD
CY2020Q3	us-gaap	Gross Profit GrossProfit	91648000	USD
CY2020Q4	us-gaap	Gross Profit GrossProfit	148588000	USD
CY2020Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	3276000	USD
CY2020Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	22061000	USD
CY2020Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	-17802000	USD
CY2020Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	49218000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	-5713000	USD
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	10589000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	-37140000	USD
CY2020Q4	us-gaap	Net Income Loss NetIncomeLoss	26043000	USD
CY2020Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	122428000	shares
CY2020Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	123842000	shares
CY2020Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	126194000	shares
CY2020Q4	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	128955000	shares
CY2020Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	122428000	shares
CY2020Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	133851000	shares
CY2020Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	126194000	shares
CY2020Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	141297000	shares
CY2020Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.05
CY2020Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.09
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.29
CY2020Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.20
CY2020Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.05
CY2020Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.08
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.29
CY2020Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.18
CY2019Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	116730000	shares
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
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
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

Files In Submission

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$CHGG
CHEGG, INC Stock $chgg

2020 Q4 Form 10-K Financial Statement

#000136495421000013 Filed on February 22, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CHGG CHEGG, INC Stock $chgg

2020 Q4 Form 10-K Financial Statement

#000136495421000013 Filed on February 22, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CHGG
CHEGG, INC Stock $chgg