$CSTL
CASTLE BIOSCIENCES INC Stock $cstl

$cstl Overview Financials Valuation SEC Filings Company Website

2019 Q4 Form 10-K Financial Statement

#000144736220000029 Filed on March 10, 2020

Income Statement

Concept	2019 Q4	2019	2018 Q4
Revenue	$17.64M	$51.87M	$11.44M
YoY Change	54.21%	127.62%
Cost Of Revenue	$2.010M	$7.310M	$1.370M
YoY Change	46.72%	38.0%
Gross Profit	$15.62M	$44.56M	$10.07M
YoY Change	55.15%	154.76%
Gross Profit Margin	88.6%	85.91%	88.06%
Selling, General & Admin	$9.830M	$29.84M	$4.080M
YoY Change	140.93%	81.18%
% of Gross Profit	62.92%	66.98%	40.52%
Research & Development	$3.160M	$7.385M	$1.140M
YoY Change	177.19%	52.14%
% of Gross Profit	20.23%	16.58%	11.32%
Depreciation & Amortization	$100.0K	$354.0K	$80.00K
YoY Change	25.0%	23.34%
% of Gross Profit	0.64%	0.79%	0.79%
Operating Expenses	$13.01M	$37.23M	$5.300M
YoY Change	145.47%	74.57%
Operating Profit	$2.614M	$7.328M	$4.770M
YoY Change	-45.2%	-291.03%
Interest Expense	-$490.0K	$4.571M	-$650.0K
YoY Change	-24.62%	101.01%
% of Operating Profit	-18.75%	62.38%	-13.63%
Other Income/Expense, Net	$0.00	-$2.933M	-$240.0K
YoY Change	-100.0%	978.31%
Pretax Income	$2.130M	$5.350M	$3.880M
YoY Change	-45.1%	-184.12%
Income Tax	$70.00K	$72.00K	$10.00K
% Of Pretax Income	3.29%	1.35%	0.26%
Net Earnings	$2.055M	$5.277M	$3.868M
YoY Change	-46.87%	-182.88%
Net Earnings / Revenue	11.65%	10.17%	33.82%
Basic Earnings Per Share	$0.12	$0.35	$1.49
Diluted Earnings Per Share	$0.11	-$0.21	$0.38
COMMON SHARES
Basic Shares Outstanding	17.07M shares	8.584M shares
Diluted Shares Outstanding		8.658M shares

Balance Sheet

Concept	2019 Q4	2019	2018 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$98.80M	$98.80M
YoY Change		2095.56%
Cash & Equivalents	$98.85M	$98.80M	$4.479M
Short-Term Investments
Other Short-Term Assets	$2.000M	$2.000M
YoY Change		185.71%
Inventory	$1.237M	$1.200M	$882.0K
Prepaid Expenses
Receivables	$14.65M	$14.60M	$12.09M
Other Receivables	$0.00	$0.00
Total Short-Term Assets	$116.7M	$116.7M	$18.13M
YoY Change	543.72%	544.75%
LONG-TERM ASSETS
Property, Plant & Equipment	$2.060M	$2.100M	$1.529M
YoY Change	34.73%	40.0%
Goodwill
YoY Change
Intangibles	$0.00		$4.000K
YoY Change	-100.0%
Long-Term Investments
YoY Change
Other Assets	$135.0K	$100.0K	$214.0K
YoY Change	-36.92%	-50.0%
Total Long-Term Assets	$3.065M	$3.000M	$4.279M
YoY Change	-28.37%	-30.23%
TOTAL ASSETS
Total Short-Term Assets	$116.7M	$116.7M	$18.13M
Total Long-Term Assets	$3.065M	$3.000M	$4.279M
Total Assets	$119.7M	$119.7M	$22.41M
YoY Change	434.46%	434.38%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$1.865M	$1.900M	$1.451M
YoY Change	28.53%	26.67%
Accrued Expenses	$7.500M	$7.500M
YoY Change		41.51%
Deferred Revenue	$0.00
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$5.833M	$5.800M	$0.00
YoY Change
Total Short-Term Liabilities	$15.29M	$15.30M	$6.737M
YoY Change	126.94%	128.36%
LONG-TERM LIABILITIES
Long-Term Debt	$19.29M	$19.30M	$24.50M
YoY Change	-21.27%	-21.22%
Other Long-Term Liabilities	$100.0K	$100.0K
YoY Change		-91.67%
Total Long-Term Liabilities	$19.29M	$19.40M	$24.50M
YoY Change	-21.27%	-24.51%
TOTAL LIABILITIES
Total Short-Term Liabilities	$15.29M	$15.30M	$6.737M
Total Long-Term Liabilities	$19.29M	$19.40M	$24.50M
Total Liabilities	$34.63M	$34.60M	$32.48M
YoY Change	6.65%	6.46%
SHAREHOLDERS EQUITY
Retained Earnings	-$52.21M		-$57.49M
YoY Change	-9.18%
Common Stock
YoY Change
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$85.11M	$85.10M	-$56.57M
YoY Change
Total Liabilities & Shareholders Equity	$119.7M	$119.7M	$22.41M
YoY Change	434.46%	434.38%

Cashflow Statement

Concept	2019 Q4	2019	2018 Q4
OPERATING ACTIVITIES
Net Income	$2.055M	$5.277M	$3.868M
YoY Change	-46.87%	-182.88%
Depreciation, Depletion And Amortization	$100.0K	$354.0K	$80.00K
YoY Change	25.0%	23.34%
Cash From Operating Activities	$4.500M	$7.015M	-$3.210M
YoY Change	-240.19%	-157.06%
INVESTING ACTIVITIES
Capital Expenditures	-$350.0K	$937.0K	-$10.00K
YoY Change	3400.0%	238.27%
Acquisitions
YoY Change
Other Investing Activities
YoY Change
Cash From Investing Activities	-$350.0K	-$937.0K	-$10.00K
YoY Change	3400.0%	238.27%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net		$65.93M
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	230.0K	$88.29M	4.420M
YoY Change	-94.8%	457.41%
NET CHANGE
Cash From Operating Activities	4.500M	$7.015M	-3.210M
Cash From Investing Activities	-350.0K	-$937.0K	-10.00K
Cash From Financing Activities	230.0K	$88.29M	4.420M
Net Change In Cash	4.380M	$94.37M	1.200M
YoY Change	265.0%	2788.46%
FREE CASH FLOW
Cash From Operating Activities	$4.500M	$7.015M	-$3.210M
Capital Expenditures	-$350.0K	$937.0K	-$10.00K
Free Cash Flow	$4.850M	$6.078M	-$3.200M
YoY Change	-251.56%	-148.35%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2019	cstl	Offering Costs And Debt Issuance Costs Incurred But Not Yet Paid OfferingCostsAndDebtIssuanceCostsIncurredButNotYetPaid	0	USD
CY2018	cstl	Other Non Cash Interest OtherNonCashInterest	0	USD
CY2019	cstl	Other Non Cash Interest OtherNonCashInterest	442000	USD
CY2018	cstl	Proceeds From Issuance Of Convertible Debt And Common Stock Warrants Net Of Issuance Costs ProceedsFromIssuanceOfConvertibleDebtAndCommonStockWarrantsNetOfIssuanceCosts	0	USD
CY2019	cstl	Temporary Equity Minimum Notice Holders Must Provide After Redemption Request TemporaryEquityMinimumNoticeHoldersMustProvideAfterRedemptionRequest	P90D
CY2019	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2018Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	1451000	USD
CY2019Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	1865000	USD
CY2019	cstl	Proceeds From Issuance Of Convertible Debt And Common Stock Warrants Net Of Issuance Costs ProceedsFromIssuanceOfConvertibleDebtAndCommonStockWarrantsNetOfIssuanceCosts	9236000	USD
CY2018	cstl	Proceeds From Issuance Of Term Debt And Preferred Stock Warrants Net Of Issuance Costs ProceedsFromIssuanceOfTermDebtAndPreferredStockWarrantsNetOfIssuanceCosts	4418000	USD
CY2018Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	12090000	USD
CY2019Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	14648000	USD
CY2019Q4	cstl	Deferred Tax Liabilities Change In Accounting Method DeferredTaxLiabilitiesChangeInAccountingMethod	303000	USD
CY2018	cstl	Effective Income Tax Rate Reconciliation Convertible Debt Interest Amount EffectiveIncomeTaxRateReconciliationConvertibleDebtInterestAmount	0	USD
CY2018Q4	us-gaap	Accounts Receivable Net Noncurrent AccountsReceivableNetNoncurrent	2532000	USD
CY2019Q4	us-gaap	Accounts Receivable Net Noncurrent AccountsReceivableNetNoncurrent	870000	USD
CY2018Q4	us-gaap	Accrued Bonuses Current And Noncurrent AccruedBonusesCurrentAndNoncurrent	3197000	USD
CY2019Q4	us-gaap	Accrued Bonuses Current And Noncurrent AccruedBonusesCurrentAndNoncurrent	4785000	USD
CY2018Q4	us-gaap	Accrued Employee Benefits Current AccruedEmployeeBenefitsCurrent	0	USD
CY2019Q4	us-gaap	Accrued Employee Benefits Current AccruedEmployeeBenefitsCurrent	218000	USD
CY2018Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	9000	USD
CY2019Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	79000	USD
CY2018Q4	us-gaap	Accrued Professional Fees Current AccruedProfessionalFeesCurrent	281000	USD
CY2019Q4	us-gaap	Accrued Professional Fees Current AccruedProfessionalFeesCurrent	1162000	USD
CY2019	cstl	Effective Income Tax Rate Reconciliation Convertible Debt Interest Amount EffectiveIncomeTaxRateReconciliationConvertibleDebtInterestAmount	95000	USD
CY2018Q4	us-gaap	Accrued Royalties Current AccruedRoyaltiesCurrent	240000	USD
CY2019Q4	us-gaap	Accrued Royalties Current AccruedRoyaltiesCurrent	169000	USD
CY2019Q4	cstl	Deferred Tax Liabilities Accounts Receivable DeferredTaxLiabilitiesAccountsReceivable	3796000	USD
CY2018Q4	cstl	Deferred Tax Liabilities Change In Accounting Method DeferredTaxLiabilitiesChangeInAccountingMethod	665000	USD
CY2019Q3	cstl	Class Of Warrant Or Right Conversion Multiplier ClassOfWarrantOrRightConversionMultiplier	1.219
CY2019Q3	cstl	Class Of Warrant Or Right Conversion Multiplier ClassOfWarrantOrRightConversionMultiplier	1.219
CY2018Q4	cstl	Class Of Warrant Or Right Exercised ClassOfWarrantOrRightExercised	219243	shares
CY2018Q4	cstl	Class Of Warrant Or Right Expired ClassOfWarrantOrRightExpired	11682	shares
CY2019	cstl	Common Stock Number Of Votes Per Share CommonStockNumberOfVotesPerShare	1	vote
CY2019	cstl	Contract With Customer Customer Payment Terms ContractWithCustomerCustomerPaymentTerms	P30D
CY2018	cstl	Conversion Of Preferred Stock Warrants Amount Issued ConversionOfPreferredStockWarrantsAmountIssued	0	USD
CY2019	cstl	Conversion Of Preferred Stock Warrants Amount Issued ConversionOfPreferredStockWarrantsAmountIssued	1745000	USD
CY2019	cstl	Conversionof Convertible Preferred Stockto Common Stock Value ConversionofConvertiblePreferredStocktoCommonStockValue	46743000	USD
CY2019	cstl	Convertible Preferred Stock Conversion Threshold Of Ipo Proceeds ConvertiblePreferredStockConversionThresholdOfIPOProceeds	30000000	USD
CY2018Q4	cstl	Deferred Tax Assets Tax Deferred Expense Reservesand Accruals Accounts Payable DeferredTaxAssetsTaxDeferredExpenseReservesandAccrualsAccountsPayable	390000	USD
CY2019Q4	cstl	Deferred Tax Assets Tax Deferred Expense Reservesand Accruals Accounts Payable DeferredTaxAssetsTaxDeferredExpenseReservesandAccrualsAccountsPayable	456000	USD
CY2018Q4	cstl	Deferred Tax Liabilities Accounts Receivable DeferredTaxLiabilitiesAccountsReceivable	3249000	USD
CY2018	cstl	Effective Income Tax Rate Reconciliation Mark To Market Losses Amount EffectiveIncomeTaxRateReconciliationMarkToMarketLossesAmount	57000	USD
CY2019	cstl	Effective Income Tax Rate Reconciliation Mark To Market Losses Amount EffectiveIncomeTaxRateReconciliationMarkToMarketLossesAmount	566000	USD
CY2018	cstl	Exercise Of Common Stock Warrants Noncash ExerciseOfCommonStockWarrantsNoncash	0	USD
CY2019	cstl	Exercise Of Common Stock Warrants Noncash ExerciseOfCommonStockWarrantsNoncash	455000	USD
CY2018	cstl	Increase Decreasein Deferred Lease Liability IncreaseDecreaseinDeferredLeaseLiability	28000	USD
CY2019	cstl	Increase Decreasein Deferred Lease Liability IncreaseDecreaseinDeferredLeaseLiability	12000	USD
CY2018	cstl	Offering Costs And Debt Issuance Costs Incurred But Not Yet Paid OfferingCostsAndDebtIssuanceCostsIncurredButNotYetPaid	91000	USD
CY2018Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	909000	USD
CY2019Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	1203000	USD
CY2018Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	921000	USD
CY2019Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	137308000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Equity Component Of Convertible Debt AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt	8378000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Equity Component Of Convertible Debt Subsequent Adjustments AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebtSubsequentAdjustments	15265000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	0	USD
CY2018	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Stock Options Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition	294000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Share Based Compensation Stock Options Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationStockOptionsRequisiteServicePeriodRecognition	1249000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	294000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	1249000	USD
CY2018Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	15102000	shares
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	0	USD
CY2019Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	200000000	shares
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	0	USD
CY2018Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	0	USD
CY2019Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	0	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	0	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	4423000	USD
CY2019Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	200000000	shares
CY2018Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	1916224	shares
CY2018	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	566000	USD
CY2019	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	1925000	USD
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	36000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	4000	USD
CY2019Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	17130907	shares
CY2018Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	1916224	shares
CY2018	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	9406000	shares
CY2019	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	6677000	shares
CY2019Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	17130907	shares
CY2019Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	5102000	USD
CY2018Q4	us-gaap	Assets Assets	22405000	USD
CY2019Q4	us-gaap	Assets Assets	119746000	USD
CY2018Q4	us-gaap	Deferred Offering Costs DeferredOfferingCosts	91000	USD
CY2018Q4	us-gaap	Deferred Rent Credit Noncurrent DeferredRentCreditNoncurrent	44000	USD
CY2019Q4	us-gaap	Deferred Rent Credit Noncurrent DeferredRentCreditNoncurrent	55000	USD
CY2018Q4	us-gaap	Common Stock Value Outstanding CommonStockValueOutstanding	2000	USD
CY2019Q4	us-gaap	Common Stock Value Outstanding CommonStockValueOutstanding	17000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-6367000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	5277000	USD
CY2018Q4	us-gaap	Assets Current AssetsCurrent	18126000	USD
CY2018Q4	us-gaap	Contract With Customer Asset Cumulative Catch Up Adjustment To Revenue Change In Estimate Of Transaction Price ContractWithCustomerAssetCumulativeCatchUpAdjustmentToRevenueChangeInEstimateOfTransactionPrice	5191000	USD
	us-gaap	Contract With Customer Performance Obligation Satisfied In Previous Period ContractWithCustomerPerformanceObligationSatisfiedInPreviousPeriod	343000	USD
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	0	USD
	us-gaap	Contract With Customer Performance Obligation Satisfied In Previous Period ContractWithCustomerPerformanceObligationSatisfiedInPreviousPeriod	2493000	USD
CY2018	us-gaap	Conversion Of Stock Amount Issued1 ConversionOfStockAmountIssued1	0	USD
CY2019Q4	us-gaap	Assets Current AssetsCurrent	116681000	USD
CY2018	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	58000	USD
CY2019	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	7000	USD
CY2019	us-gaap	Conversion Of Stock Amount Issued1 ConversionOfStockAmountIssued1	46743000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	0	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	4479000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Charitable Contribution Carryforwards DeferredTaxAssetsCharitableContributionCarryforwards	4000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Charitable Contribution Carryforwards DeferredTaxAssetsCharitableContributionCarryforwards	2000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Goodwill And Intangible Assets DeferredTaxAssetsGoodwillAndIntangibleAssets	61000	USD
CY2018	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	5297000	USD
CY2019	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	7310000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	USD
CY2019	cstl	Temporary Equity Numberof Annual Installments To Redeem Outstanding Shares TemporaryEquityNumberofAnnualInstallmentsToRedeemOutstandingShares	3	installment
CY2019	cstl	Temporary Equity Period After Issuance When Holder Can Request Redemption TemporaryEquityPeriodAfterIssuanceWhenHolderCanRequestRedemption	P5Y
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	Document Period End Date DocumentPeriodEndDate	2019-12-31
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	98845000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	98800000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1212000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	9000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	72000	USD
CY2019	dei	Document Type DocumentType	10-K
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	4479000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	98845000	USD
CY2018	us-gaap	Debt Conversion Converted Instrument Amount1 DebtConversionConvertedInstrumentAmount1	0	USD
CY2019	us-gaap	Debt Conversion Converted Instrument Amount1 DebtConversionConvertedInstrumentAmount1	26578000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	3267000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	94366000	USD
CY2018Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2019Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2019	dei	Entity Central Index Key EntityCentralIndexKey	0001447362
CY2020Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	17192351	shares
CY2019	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2019	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	true
CY2019	cstl	Proceeds From Issuance Of Term Debt And Preferred Stock Warrants Net Of Issuance Costs ProceedsFromIssuanceOfTermDebtAndPreferredStockWarrantsNetOfIssuanceCosts	0	USD
CY2019	cstl	Proceedsfrom Issuance Initial Public Offering Gross ProceedsfromIssuanceInitialPublicOfferingGross	73600000	USD
CY2019	cstl	Reclassificationsof Liabilityto Permanent Equity ReclassificationsofLiabilitytoPermanentEquity	1744000	USD
CY2019	cstl	Revenue From Contract With Customer Revenue Not Yet Recognized Number Of Claims In Adjudication Process RevenueFromContractWithCustomerRevenueNotYetRecognizedNumberOfClaimsInAdjudicationProcess	2698	claim
CY2019	cstl	Stock Issued During Period Value Warrants Exercised StockIssuedDuringPeriodValueWarrantsExercised	0	USD
CY2019Q3	cstl	Temporary Equity Conversion Multiplier TemporaryEquityConversionMultiplier	1.219
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	9000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	72000	USD
CY2019	dei	Entity Ex Transition Period EntityExTransitionPeriod	false
CY2019	dei	Entity Filer Category EntityFilerCategory	Non-accelerated Filer
CY2019	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2019Q2	dei	Entity Public Float EntityPublicFloat	0	USD
CY2019	dei	Entity Registrant Name EntityRegistrantName	CASTLE BIOSCIENCES INC
CY2019	dei	Entity Shell Company EntityShellCompany	false
CY2019	dei	Entity Small Business EntitySmallBusiness	true
CY2019	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2019Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2019Q3	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2018	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0
CY2019	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0
CY2018	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0
CY2019	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0
CY2018Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2018Q4	us-gaap	Class Of Warrant Or Right Number Of Securities Called By Warrants Or Rights ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights	403142	shares
CY2018Q4	us-gaap	Class Of Warrant Or Right Outstanding ClassOfWarrantOrRightOutstanding	172217	shares
CY2019Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	0	USD
CY2018Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	4423000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	5102000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	16184000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	14077000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Goodwill And Intangible Assets DeferredTaxAssetsGoodwillAndIntangibleAssets	50000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	18798000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	17522000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	0	USD
CY2018	us-gaap	Embedded Derivative Gain Loss On Embedded Derivative Net EmbeddedDerivativeGainLossOnEmbeddedDerivativeNet	0	USD
CY2019	us-gaap	Embedded Derivative Gain Loss On Embedded Derivative Net EmbeddedDerivativeGainLossOnEmbeddedDerivativeNet	-237000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Research DeferredTaxAssetsTaxCreditCarryforwardsResearch	715000	USD
CY2018Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-2.15
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-2.33
CY2019Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Research DeferredTaxAssetsTaxCreditCarryforwardsResearch	993000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	12000	USD
CY2018Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.49
CY2018Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	4571000	USD
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-5.33
CY2019Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-1.22
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-1.05
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.43
CY2019	us-gaap	Fair Value Option Changes In Fair Value Gain Loss1 FairValueOptionChangesInFairValueGainLoss1	-2077000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	271000	USD
CY2019Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.12
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.35
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	127000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	1432000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	1817000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	14375000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	12420000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	378000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	757000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	131000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	246000	USD
CY2018	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	338000	USD
CY2019	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	434000	USD
CY2018	us-gaap	Depreciation Depreciation	287000	USD
CY2019	us-gaap	Depreciation Depreciation	354000	USD
CY2018	us-gaap	Dilutive Securities Effect On Basic Earnings Per Share Other DilutiveSecuritiesEffectOnBasicEarningsPerShareOther	0	USD
CY2019	us-gaap	Dilutive Securities Effect On Basic Earnings Per Share Other DilutiveSecuritiesEffectOnBasicEarningsPerShareOther	420000	USD
CY2018Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-2.37
CY2018Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-2.37
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-2.15
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-2.33
CY2018Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.38
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-5.33
CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-1.22
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-1.05
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.05
CY2019Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.11
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.21
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	53000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Share Based Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount	65000	USD
CY2019Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	5779000	USD
CY2018	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	0	USD
CY2019	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	0	USD
CY2018	us-gaap	Fair Value Adjustment Of Warrants FairValueAdjustmentOfWarrants	272000	USD
CY2019	us-gaap	Fair Value Adjustment Of Warrants FairValueAdjustmentOfWarrants	619000	USD
CY2018	us-gaap	Fair Value Option Changes In Fair Value Gain Loss1 FairValueOptionChangesInFairValueGainLoss1	0	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	275000	USD
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	1123000	USD
CY2018	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	1347000	USD
CY2019	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	1208000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	4000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	0	USD
CY2018	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2019Q3	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	5213000	USD
CY2019	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	5213000	USD
CY2018Q1	us-gaap	Gross Profit GrossProfit	2406000	USD
CY2018Q2	us-gaap	Gross Profit GrossProfit	2652000	USD
CY2018Q3	us-gaap	Gross Profit GrossProfit	2361000	USD
CY2018Q4	us-gaap	Gross Profit GrossProfit	10070000	USD
CY2018	us-gaap	Gross Profit GrossProfit	17489000	USD
CY2019Q1	us-gaap	Gross Profit GrossProfit	7119000	USD
CY2019Q2	us-gaap	Gross Profit GrossProfit	8746000	USD
CY2019Q3	us-gaap	Gross Profit GrossProfit	13066000	USD
CY2019Q4	us-gaap	Gross Profit GrossProfit	15624000	USD
CY2019	us-gaap	Gross Profit GrossProfit	44555000	USD
CY2018	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	USD
CY2019	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	USD
CY2018	us-gaap	Income Loss Attributable To Parent IncomeLossAttributableToParent	-6358000	USD
CY2019	us-gaap	Income Loss Attributable To Parent IncomeLossAttributableToParent	5349000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	9000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	72000	USD
CY2018	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	2278000	USD
CY2019	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-2747000	USD
CY2018	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-1335000	USD
CY2018	us-gaap	Income Tax Reconciliation Nondeductible Expense Meals And Entertainment IncomeTaxReconciliationNondeductibleExpenseMealsAndEntertainment	119000	USD
CY2019	us-gaap	Income Tax Reconciliation Nondeductible Expense Meals And Entertainment IncomeTaxReconciliationNondeductibleExpenseMealsAndEntertainment	224000	USD
CY2018	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	11000	USD
CY2019	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	39000	USD
CY2018	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-1174000	USD
CY2019	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	958000	USD
CY2018	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	0	USD
CY2019	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	251000	USD
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	160000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-150000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	197000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	557000	USD
CY2018	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	8408000	USD
CY2019	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	896000	USD
CY2018	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	578000	USD
CY2019	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	355000	USD
CY2018	us-gaap	Increase Decrease In Other Accrued Liabilities IncreaseDecreaseInOtherAccruedLiabilities	201000	USD
CY2019	us-gaap	Increase Decrease In Other Accrued Liabilities IncreaseDecreaseInOtherAccruedLiabilities	879000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-14000	USD
CY2019Q4	us-gaap	Liabilities Liabilities	34633000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	85000	USD
CY2018	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	160000	USD
CY2018Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	22405000	USD
CY2019Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	119746000	USD
CY2019	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	1276000	USD
CY2018	us-gaap	Incremental Common Shares Attributable To Conversion Of Debt Securities IncrementalCommonSharesAttributableToConversionOfDebtSecurities	0	shares
CY2018Q4	us-gaap	Liabilities Current LiabilitiesCurrent	6737000	USD
CY2019Q4	us-gaap	Liabilities Current LiabilitiesCurrent	15289000	USD
CY2019Q4	us-gaap	Long Term Debt LongTermDebt	26688000	USD
CY2018Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	0	USD
CY2019Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	5833000	USD
CY2019	us-gaap	Incremental Common Shares Attributable To Conversion Of Debt Securities IncrementalCommonSharesAttributableToConversionOfDebtSecurities	74000	shares
CY2018Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	4000	USD
CY2019Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	0	USD
CY2018	us-gaap	Interest Expense InterestExpense	2274000	USD
CY2019	us-gaap	Interest Expense InterestExpense	4571000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	1635000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	2206000	USD
CY2018Q4	us-gaap	Interest Payable Current InterestPayableCurrent	185000	USD
CY2019Q4	us-gaap	Interest Payable Current InterestPayableCurrent	184000	USD
CY2018Q4	us-gaap	Inventory Net InventoryNet	882000	USD
CY2019Q4	us-gaap	Inventory Net InventoryNet	1237000	USD
CY2018	us-gaap	Investment Income Interest InvestmentIncomeInterest	24000	USD
CY2019	us-gaap	Investment Income Interest InvestmentIncomeInterest	312000	USD
CY2018	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	315000	USD
CY2019	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	395000	USD
CY2018Q4	us-gaap	Liabilities Liabilities	32475000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	5833000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	0	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	0	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	10855000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	10000000	USD
CY2018Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	24500000	USD
CY2019Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	19289000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	15839000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	88288000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-277000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-937000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-12295000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	7015000	USD
CY2018Q1	us-gaap	Net Income Loss NetIncomeLoss	-3630000	USD
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	-3155000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	-3450000	USD
CY2018Q4	us-gaap	Net Income Loss NetIncomeLoss	3868000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	-6367000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	-1358000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	-1269000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	5849000	USD
CY2019Q4	us-gaap	Net Income Loss NetIncomeLoss	2055000	USD
CY2019Q4	us-gaap	Preferred Stock Value Outstanding PreferredStockValueOutstanding	0	USD
CY2019Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	1625000	USD
CY2018Q4	us-gaap	Preferred Stock Value Outstanding PreferredStockValueOutstanding	0	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	5277000	USD
CY2018Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-4489000	USD
CY2018Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-4080000	USD
CY2018Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-4456000	USD
CY2018Q4	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	2862000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-10163000	USD
CY2019Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-2342000	USD
CY2019Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-2265000	USD
CY2019Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	5543000	USD
CY2019Q4	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	2055000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	2991000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	-10163000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	-1802000	USD
CY2019	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	1	segment
CY2018	us-gaap	Operating Expenses OperatingExpenses	21325000	USD
CY2019	us-gaap	Operating Expenses OperatingExpenses	37227000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	-3836000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	7328000	USD
CY2019Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	6395000	USD
CY2019Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	754000	USD
CY2019Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	999000	USD
CY2019Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	1029000	USD
CY2019Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	993000	USD
CY2019Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	995000	USD
CY2018Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	715000	USD
CY2019Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	1812000	USD
CY2018Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	214000	USD
CY2019Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	135000	USD
CY2018	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	24000	USD
CY2019	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	0	USD
CY2018	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-272000	USD
CY2019	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-2933000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	277000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	937000	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
CY2019Q3	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.001
CY2018Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	0	shares
CY2019Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	10000000	shares
CY2019Q3	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
CY2019Q3	us-gaap	Proceeds From Issuance Initial Public Offering ProceedsFromIssuanceInitialPublicOffering	65900000	USD
CY2018Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	675000	USD
CY2018Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3659000	USD
CY2019Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	1951000	USD
CY2018	us-gaap	Proceeds From Issuance Initial Public Offering ProceedsFromIssuanceInitialPublicOffering	0	USD
CY2019	us-gaap	Proceeds From Issuance Initial Public Offering ProceedsFromIssuanceInitialPublicOffering	65931000	USD
CY2018	us-gaap	Proceeds From Issuance Of Preferred Stock Preference Stock And Warrants ProceedsFromIssuanceOfPreferredStockPreferenceStockAndWarrants	10383000	USD
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	2.20
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	0	USD
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	77038	shares
CY2019	us-gaap	Proceeds From Issuance Of Preferred Stock Preference Stock And Warrants ProceedsFromIssuanceOfPreferredStockPreferenceStockAndWarrants	49000	USD
CY2018	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	0	USD
CY2019	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	1776000	USD
CY2018	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	1000000	USD
CY2019	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	0	USD
CY2019	us-gaap	Proceeds From Related Party Debt ProceedsFromRelatedPartyDebt	4756000	USD
CY2018	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	0	USD
CY2019	us-gaap	Proceeds From Short Term Debt ProceedsFromShortTermDebt	11695000	USD
CY2018	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	38000	USD
CY2019	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	1174000	USD
CY2018	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	0	USD
CY2019	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	218000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	2438000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	3263000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	1529000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	2060000	USD
CY2018	us-gaap	Repayments Of Long Term Lines Of Credit RepaymentsOfLongTermLinesOfCredit	0	USD
CY2019	us-gaap	Repayments Of Long Term Lines Of Credit RepaymentsOfLongTermLinesOfCredit	1791000	USD
CY2018	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	4854000	USD
CY2019	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	7385000	USD
CY2018Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-57489000	USD
CY2019Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-52200000	USD
CY2019Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-52212000	USD
CY2018Q2	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3979000	USD
CY2018Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3712000	USD
CY2018Q4	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	11436000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	22786000	USD
CY2019Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	8717000	USD
CY2019Q2	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	10739000	USD
CY2019Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	14774000	USD
CY2019Q4	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	17635000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	51865000	USD
CY2018	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	16471000	USD
CY2019	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	29842000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	294000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	1249000	USD
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Additional Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized	410172	shares
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Additional Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized	2075898	shares
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	551918	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	458726	shares
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	863127	shares
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	590104	shares
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	5151000	USD
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	39828	shares
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	1.82
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	6.36
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	580402	shares
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	1711325	shares
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	55578000	USD
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	1175987	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	1659596	shares
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	2637966	shares
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	1.79
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	1.99
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	13.30
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	1.91
CY2019	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	1.70
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	2.39
CY2019	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	19.41
CY2019Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	18984000	USD
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P6Y1M8D
CY2019Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Number Of Shares SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares	126044	shares
CY2019Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Weighted Average Grant Date Fair Value SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue	2.39
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P8Y7M20D
CY2018	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	19755	shares
CY2019	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	693127	shares
CY2019	us-gaap	Stock Issued During Period Value Conversion Of Convertible Securities StockIssuedDuringPeriodValueConversionOfConvertibleSecurities	26577000	USD
CY2019	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	65931000	USD
CY2018	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	38000	USD
CY2019	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	1175000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	-50311000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	-56566000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	85113000	USD
CY2019Q3	us-gaap	Stockholders Equity Note Stock Split Conversion Ratio1 StockholdersEquityNoteStockSplitConversionRatio1	0.8203
CY2018	us-gaap	Temporary Equity Accretion To Redemption Value Adjustment TemporaryEquityAccretionToRedemptionValueAdjustment	219000	USD
CY2019	us-gaap	Temporary Equity Accretion To Redemption Value Adjustment TemporaryEquityAccretionToRedemptionValueAdjustment	130000	USD
CY2018	us-gaap	Temporary Equity Dividends Adjustment TemporaryEquityDividendsAdjustment	3577000	USD
CY2019	us-gaap	Temporary Equity Dividends Adjustment TemporaryEquityDividendsAdjustment	2156000	USD
CY2019Q3	us-gaap	Temporary Equity Shares Outstanding TemporaryEquitySharesOutstanding	9973884	shares
CY2018Q4	us-gaap	Warrants And Rights Outstanding WarrantsAndRightsOutstanding	1194000	USD
CY2019Q4	us-gaap	Warrants And Rights Outstanding WarrantsAndRightsOutstanding	0	USD
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	1906000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	8658000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	1906000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	8584000	shares
CY2019	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-bottom:8px;padding-top:8px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;color:#231f20;">A majority of the Company’s cash and cash equivalents are deposited with a single financial institution. </font></div></div>
CY2019	us-gaap	Use Of Estimates UseOfEstimates	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-bottom:8px;padding-top:8px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;color:#231f20;">The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Significant items subject to such estimates include revenue recognition, the determination of fair value of the Company’s preferred stock warrants and convertible debt embedded derivatives, the valuation of stock options, assessing future tax exposure and the realization of deferred tax assets, the useful lives and recoverability of property and equipment, and contingent liabilities. The Company bases these estimates on historical and anticipated results, trends, and various other assumptions that the Company believes are reasonable under the circumstances, including assumptions as to future events. These estimates form the basis for making judgments about the carrying values of assets and liabilities and recorded revenues and expenses that are not readily apparent from other sources. Actual results could differ from those estimates and assumptions.</font></div></div>

Files In Submission

Name	View Source	Status
0001447362-20-000029-index-headers.html	Edgar Link	pending
0001447362-20-000029-index.html	Edgar Link	pending
0001447362-20-000029.txt	Edgar Link	pending
0001447362-20-000029-xbrl.zip	Edgar Link	pending
a1231201910-k.htm	Edgar Link	pending
cstl-20191231.xml	Edgar Link	completed
cstl-20191231.xsd	Edgar Link	pending
cstl-20191231_cal.xml	Edgar Link	unprocessable
cstl-20191231_def.xml	Edgar Link	unprocessable
cstl-20191231_lab.xml	Edgar Link	unprocessable
cstl-20191231_pre.xml	Edgar Link	unprocessable
decisiondxscca01.jpg	Edgar Link	pending
diagram10a.jpg	Edgar Link	pending
diagram12.jpg	Edgar Link	pending
diagram13.jpg	Edgar Link	pending
diagram17.jpg	Edgar Link	pending
diagram18.jpg	Edgar Link	pending
diagram20.jpg	Edgar Link	pending
diagram7.jpg	Edgar Link	pending
diagram8a01.jpg	Edgar Link	pending
diagram8a03.jpg	Edgar Link	pending
exhibit1015phoenixleaseame.htm	Edgar Link	pending
exhibit23consent10-k2019.htm	Edgar Link	pending
exhibit311yearend2019.htm	Edgar Link	pending
exhibit312yearend2019.htm	Edgar Link	pending
exhibit321yearend2019.htm	Edgar Link	pending
exhibit322yearend2019.htm	Edgar Link	pending
exhibit41descriptionofsecu.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
linechart1a01.jpg	Edgar Link	pending
melanoma.jpg	Edgar Link	pending
nt10000802x12samples.jpg	Edgar Link	pending
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
R11.htm	Edgar Link	pending
R12.htm	Edgar Link	pending
R13.htm	Edgar Link	pending
R14.htm	Edgar Link	pending
R15.htm	Edgar Link	pending
R16.htm	Edgar Link	pending
R17.htm	Edgar Link	pending
R18.htm	Edgar Link	pending
R19.htm	Edgar Link	pending
R2.htm	Edgar Link	pending
R20.htm	Edgar Link	pending
R21.htm	Edgar Link	pending
R22.htm	Edgar Link	pending
R23.htm	Edgar Link	pending
R24.htm	Edgar Link	pending
R25.htm	Edgar Link	pending
R26.htm	Edgar Link	pending
R27.htm	Edgar Link	pending
R28.htm	Edgar Link	pending
R29.htm	Edgar Link	pending
R3.htm	Edgar Link	pending
R30.htm	Edgar Link	pending
R31.htm	Edgar Link	pending
R32.htm	Edgar Link	pending
R33.htm	Edgar Link	pending
R34.htm	Edgar Link	pending
R35.htm	Edgar Link	pending
R36.htm	Edgar Link	pending
R37.htm	Edgar Link	pending
R38.htm	Edgar Link	pending
R39.htm	Edgar Link	pending
R4.htm	Edgar Link	pending
R40.htm	Edgar Link	pending
R41.htm	Edgar Link	pending
R42.htm	Edgar Link	pending
R43.htm	Edgar Link	pending
R44.htm	Edgar Link	pending
R45.htm	Edgar Link	pending
R46.htm	Edgar Link	pending
R47.htm	Edgar Link	pending
R48.htm	Edgar Link	pending
R49.htm	Edgar Link	pending
R5.htm	Edgar Link	pending
R50.htm	Edgar Link	pending
R51.htm	Edgar Link	pending
R52.htm	Edgar Link	pending
R53.htm	Edgar Link	pending
R54.htm	Edgar Link	pending
R55.htm	Edgar Link	pending
R56.htm	Edgar Link	pending
R57.htm	Edgar Link	pending
R58.htm	Edgar Link	pending
R59.htm	Edgar Link	pending
R6.htm	Edgar Link	pending
R60.htm	Edgar Link	pending
R61.htm	Edgar Link	pending
R62.htm	Edgar Link	pending
R63.htm	Edgar Link	pending
R64.htm	Edgar Link	pending
R65.htm	Edgar Link	pending
R66.htm	Edgar Link	pending
R67.htm	Edgar Link	pending
R68.htm	Edgar Link	pending
R69.htm	Edgar Link	pending
R7.htm	Edgar Link	pending
R70.htm	Edgar Link	pending
R71.htm	Edgar Link	pending
R72.htm	Edgar Link	pending
R73.htm	Edgar Link	pending
R74.htm	Edgar Link	pending
R75.htm	Edgar Link	pending
R76.htm	Edgar Link	pending
R77.htm	Edgar Link	pending
R78.htm	Edgar Link	pending
R8.htm	Edgar Link	pending
R9.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending
table1.jpg	Edgar Link	pending
table2.jpg	Edgar Link	pending
umdecision.jpg	Edgar Link	pending

Create your account

Find Stocks Worth Researching

Deeply Understand Businesses

Value Businesses Intelligently

$CSTL
CASTLE BIOSCIENCES INC Stock $cstl

2019 Q4 Form 10-K Financial Statement

#000144736220000029 Filed on March 10, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CSTL CASTLE BIOSCIENCES INC Stock $cstl

2019 Q4 Form 10-K Financial Statement

#000144736220000029 Filed on March 10, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CSTL
CASTLE BIOSCIENCES INC Stock $cstl