$GOSS
Gossamer Bio, Inc. Stock $goss

$goss Overview Financials Valuation SEC Filings Company Website

2019 Q4 Form 10-K Financial Statement

#000172811721000019 Filed on February 26, 2021

Income Statement

Concept	2019 Q4	2018	2017 Q4
Revenue	$0.00	$0.00	$0.00
YoY Change
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin	$11.59M	$43.75M	$160.0K
YoY Change	-16.01%	16726.92%
% of Gross Profit
Research & Development	$42.60M	$55.28M	$680.0K
YoY Change	64.67%	6104.6%
% of Gross Profit
Depreciation & Amortization	$290.0K	$297.0K	$0.00
YoY Change	107.14%
% of Gross Profit
Operating Expenses	$54.19M	$149.0M	$830.0K
YoY Change	36.12%	2139.49%
Operating Profit	-$55.79M	-$149.0M
YoY Change	40.14%	2139.49%
Interest Expense		$12.00K	-$120.0K
YoY Change		-110.0%
% of Operating Profit
Other Income/Expense, Net	$1.090M	$2.024M	$0.00
YoY Change	240.63%	-1815.25%
Pretax Income	-$54.70M	-$116.9M	-$6.450M
YoY Change	41.02%	-1826.78%
Income Tax		$0.00
% Of Pretax Income
Net Earnings	-$54.70M	-$147.0M	-$6.450M
YoY Change	41.0%	2070.57%
Net Earnings / Revenue
Basic Earnings Per Share
Diluted Earnings Per Share	-$891.6K	-$2.231M	-$101.9K
COMMON SHARES
Basic Shares Outstanding	66.04M
Diluted Shares Outstanding

Balance Sheet

Concept	2019 Q4	2018	2017 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$401.8M	$228.7M
YoY Change	75.69%	76133.33%
Cash & Equivalents	$135.0M	$105.2M	$315.0K
Short-Term Investments	$266.7M	$123.4M
Other Short-Term Assets	$7.500M	$3.300M
YoY Change	127.27%	3200.0%
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets	$409.3M	$232.0M
YoY Change	76.47%	57900.0%
LONG-TERM ASSETS
Property, Plant & Equipment	$5.425M	$3.200M
YoY Change	69.9%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$1.559M	$4.300M
YoY Change	-63.52%
Total Long-Term Assets	$17.29M	$7.400M
YoY Change	131.54%
TOTAL ASSETS
Total Short-Term Assets	$409.3M	$232.0M
Total Long-Term Assets	$17.29M	$7.400M
Total Assets	$426.6M	$239.4M
YoY Change	78.18%	59750.0%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$956.0K	$2.200M
YoY Change	-56.19%	2100.0%
Accrued Expenses	$16.71M	$18.20M
YoY Change	120.78%	1416.67%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$36.92M	$20.40M
YoY Change	80.97%	1469.23%
LONG-TERM LIABILITIES
Long-Term Debt	$28.46M	$0.00
YoY Change		-100.0%
Other Long-Term Liabilities	$8.700M	$700.0K
YoY Change	1142.86%
Total Long-Term Liabilities	$28.46M	$700.0K
YoY Change	3965.57%	-88.33%
TOTAL LIABILITIES
Total Short-Term Liabilities	$36.92M	$20.40M
Total Long-Term Liabilities	$28.46M	$700.0K
Total Liabilities	$74.12M	$21.10M
YoY Change	250.93%	189.04%
SHAREHOLDERS EQUITY
Retained Earnings	-$334.2M
YoY Change	117.21%
Common Stock	$686.4M
YoY Change	1927.46%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$352.5M	$218.3M	-$6.862M
YoY Change
Total Liabilities & Shareholders Equity	$426.6M	$239.4M
YoY Change	78.18%	59750.0%

Cashflow Statement

Concept	2019 Q4	2018	2017 Q4
OPERATING ACTIVITIES
Net Income	-$54.70M	-$147.0M	-$6.450M
YoY Change	41.0%	2070.57%
Depreciation, Depletion And Amortization	$290.0K	$297.0K	$0.00
YoY Change	107.14%
Cash From Operating Activities	-$44.14M	-$51.04M	-$5.730M
YoY Change	76.42%	788.49%
INVESTING ACTIVITIES
Capital Expenditures	-$530.0K	$3.490M	$0.00
YoY Change	65.62%
Acquisitions
YoY Change
Other Investing Activities	$47.46M	-$141.2M	$0.00
YoY Change	-667.7%
Cash From Investing Activities	$46.94M	-$144.7M	$0.00
YoY Change	-640.78%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net		$0.00
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	1.520M	$300.9M	6.000M
YoY Change	-171.03%	4914.32%
NET CHANGE
Cash From Operating Activities	-44.14M	-$51.04M	-5.730M
Cash From Investing Activities	46.94M	-$144.7M	0.000
Cash From Financing Activities	1.520M	$300.9M	6.000M
Net Change In Cash	4.320M	$105.1M	270.0K
YoY Change	-112.05%	41117.25%
FREE CASH FLOW
Cash From Operating Activities	-$44.14M	-$51.04M	-$5.730M
Capital Expenditures	-$530.0K	$3.490M	$0.00
Free Cash Flow	-$43.61M	-$54.53M	-$5.730M
YoY Change	76.56%	849.24%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2020	dei	Amendment Flag AmendmentFlag	false
CY2020	dei	Document Period End Date DocumentPeriodEndDate	2020-12-31
CY2020	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
CY2020	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2020	dei	Entity Central Index Key EntityCentralIndexKey	0001728117
CY2020	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2020	dei	Entity Address Address Line1 EntityAddressAddressLine1	3013 Science Park Road
CY2020	dei	Entity Address City Or Town EntityAddressCityOrTown	San Diego
CY2020	dei	Entity Address State Or Province EntityAddressStateOrProvince	CA
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CY2020	dei	Document Type DocumentType	10-K
CY2020	dei	Document Annual Report DocumentAnnualReport	true
CY2020	dei	Document Transition Report DocumentTransitionReport	false
CY2020	dei	Entity File Number EntityFileNumber	001-38796
CY2020	dei	Entity Registrant Name EntityRegistrantName	GOSSAMER BIO, INC.
CY2020	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2020	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	47-5461709
CY2020	dei	Entity Address Address Line1 EntityAddressAddressLine1	3013 Science Park Road
CY2020	dei	Entity Address City Or Town EntityAddressCityOrTown	San Diego
CY2020	dei	Entity Address State Or Province EntityAddressStateOrProvince	CA
CY2020	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	92121
CY2020	dei	City Area Code CityAreaCode	858
CY2020	dei	Local Phone Number LocalPhoneNumber	684-1300
CY2020	dei	Security12b Title Security12bTitle	Common Stock, $0.0001 par value per share
CY2020	dei	Trading Symbol TradingSymbol	GOSS
CY2020	dei	Security Exchange Name SecurityExchangeName	NASDAQ
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CY2020	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
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CY2019	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-2714000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	584000	USD
CY2020	goss	Increase Decrease In Operating Lease Liabilities IncreaseDecreaseInOperatingLeaseLiabilities	2851000	USD
CY2019	goss	Increase Decrease In Operating Lease Liabilities IncreaseDecreaseInOperatingLeaseLiabilities	2108000	USD
CY2018	goss	Increase Decrease In Operating Lease Liabilities IncreaseDecreaseInOperatingLeaseLiabilities	0	USD
CY2020	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	6984000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-1399000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	2085000	USD
CY2020	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	1096000	USD
CY2019	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	1521000	USD
CY2018	us-gaap	Increase Decrease In Accrued Liabilities IncreaseDecreaseInAccruedLiabilities	5938000	USD
CY2020	goss	Increase Decrease In Accrued Research And Development Expenses IncreaseDecreaseInAccruedResearchAndDevelopmentExpenses	-8827000	USD
CY2019	goss	Increase Decrease In Accrued Research And Development Expenses IncreaseDecreaseInAccruedResearchAndDevelopmentExpenses	8605000	USD
CY2018	goss	Increase Decrease In Accrued Research And Development Expenses IncreaseDecreaseInAccruedResearchAndDevelopmentExpenses	10527000	USD
CY2020	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	1612000	USD
CY2019	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	5180000	USD
CY2018	us-gaap	Increase Decrease In Employee Related Liabilities IncreaseDecreaseInEmployeeRelatedLiabilities	0	USD
CY2020	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	0	USD
CY2019	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	0	USD
CY2018	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-117000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-176360000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-144834000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-51044000	USD
CY2020	goss	Payments For Proceeds From Research And Development Asset Acquisitions PaymentsForProceedsFromResearchAndDevelopmentAssetAcquisitions	23380000	USD
CY2019	goss	Payments For Proceeds From Research And Development Asset Acquisitions PaymentsForProceedsFromResearchAndDevelopmentAssetAcquisitions	3600000	USD
CY2018	goss	Payments For Proceeds From Research And Development Asset Acquisitions PaymentsForProceedsFromResearchAndDevelopmentAssetAcquisitions	17721000	USD
CY2020	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	108968000	USD
CY2019	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	499079000	USD
CY2018	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	123500000	USD
CY2020	goss	Proceeds From Maturity Of Marketable Securities ProceedsFromMaturityOfMarketableSecurities	265678000	USD
CY2019	goss	Proceeds From Maturity Of Marketable Securities ProceedsFromMaturityOfMarketableSecurities	328000000	USD
CY2018	goss	Proceeds From Maturity Of Marketable Securities ProceedsFromMaturityOfMarketableSecurities	0	USD
CY2020	goss	Proceeds From Sale Of Marketable Securities ProceedsFromSaleOfMarketableSecurities	83515000	USD
CY2019	goss	Proceeds From Sale Of Marketable Securities ProceedsFromSaleOfMarketableSecurities	30501000	USD
CY2018	goss	Proceeds From Sale Of Marketable Securities ProceedsFromSaleOfMarketableSecurities	0	USD
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1503000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	2966000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	3490000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	215342000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-147144000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-144711000	USD
CY2020	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	117110000	USD
CY2019	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	291311000	USD
CY2018	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	USD
CY2020	us-gaap	Proceeds From Convertible Debt ProceedsFromConvertibleDebt	193596000	USD
CY2019	us-gaap	Proceeds From Convertible Debt ProceedsFromConvertibleDebt	0	USD
CY2018	us-gaap	Proceeds From Convertible Debt ProceedsFromConvertibleDebt	0	USD
CY2019	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	1778000	USD
CY2020	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	0	USD
CY2019	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	28222000	USD
CY2018	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	0	USD
CY2020	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	534000	USD
CY2019	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	2045000	USD
CY2018	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	0	USD
CY2020	us-gaap	Repayments Of Related Party Debt RepaymentsOfRelatedPartyDebt	0	USD
CY2019	us-gaap	Repayments Of Related Party Debt RepaymentsOfRelatedPartyDebt	0	USD
CY2018	us-gaap	Repayments Of Related Party Debt RepaymentsOfRelatedPartyDebt	40000	USD
CY2020	goss	Payment Of Deferred Offering Costs PaymentOfDeferredOfferingCosts	0	USD
CY2019	goss	Payment Of Deferred Offering Costs PaymentOfDeferredOfferingCosts	0	USD
CY2018	goss	Payment Of Deferred Offering Costs PaymentOfDeferredOfferingCosts	2144000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	312540000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	321578000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	300859000	USD
CY2020	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	9000	USD
CY2019	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	70000	USD
CY2018	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	0	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	351531000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	29670000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	105104000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	135089000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	105419000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	315000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	486620000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	135089000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	105419000	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	7871000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	1475000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	119000	USD
CY2020	goss	Acquisition Of In Process Research And Development Through Issuance Of Stock AcquisitionOfInProcessResearchAndDevelopmentThroughIssuanceOfStock	0	USD
CY2019	goss	Acquisition Of In Process Research And Development Through Issuance Of Stock AcquisitionOfInProcessResearchAndDevelopmentThroughIssuanceOfStock	0	USD
CY2018	goss	Acquisition Of In Process Research And Development Through Issuance Of Stock AcquisitionOfInProcessResearchAndDevelopmentThroughIssuanceOfStock	19284000	USD
CY2020	goss	Issuance Of Convertible Preferred Stock To Convert Debt And Accrued Interest IssuanceOfConvertiblePreferredStockToConvertDebtAndAccruedInterest	0	USD
CY2019	goss	Issuance Of Convertible Preferred Stock To Convert Debt And Accrued Interest IssuanceOfConvertiblePreferredStockToConvertDebtAndAccruedInterest	0	USD
CY2018	goss	Issuance Of Convertible Preferred Stock To Convert Debt And Accrued Interest IssuanceOfConvertiblePreferredStockToConvertDebtAndAccruedInterest	6124000	USD
CY2020	goss	Unpaid Deferred Offering Costs Net UnpaidDeferredOfferingCostsNet	0	USD
CY2019	goss	Unpaid Deferred Offering Costs Net UnpaidDeferredOfferingCostsNet	0	USD
CY2018	goss	Unpaid Deferred Offering Costs Net UnpaidDeferredOfferingCostsNet	1545000	USD
CY2020	goss	Right Of Use Assets Obtained In Exchange For Lease Liabilities RightOfUseAssetsObtainedInExchangeForLeaseLiabilities	3106000	USD
CY2019	goss	Right Of Use Assets Obtained In Exchange For Lease Liabilities RightOfUseAssetsObtainedInExchangeForLeaseLiabilities	12458000	USD
CY2018	goss	Right Of Use Assets Obtained In Exchange For Lease Liabilities RightOfUseAssetsObtainedInExchangeForLeaseLiabilities	0	USD
CY2020	goss	Noncash Financing And Investing Conversions Of Convertible Preferred Stock To Common Stock NoncashFinancingAndInvestingConversionsOfConvertiblePreferredStockToCommonStock	0	USD
CY2019	goss	Noncash Financing And Investing Conversions Of Convertible Preferred Stock To Common Stock NoncashFinancingAndInvestingConversionsOfConvertiblePreferredStockToCommonStock	338367000	USD
CY2018	goss	Noncash Financing And Investing Conversions Of Convertible Preferred Stock To Common Stock NoncashFinancingAndInvestingConversionsOfConvertiblePreferredStockToCommonStock	0	USD
CY2020	goss	Noncash Investing And Financing Activities Change In Unrealized Gain On Marketable Securities Net Of Tax NoncashInvestingAndFinancingActivitiesChangeInUnrealizedGainOnMarketableSecuritiesNetOfTax	-100000	USD
CY2019	goss	Noncash Investing And Financing Activities Change In Unrealized Gain On Marketable Securities Net Of Tax NoncashInvestingAndFinancingActivitiesChangeInUnrealizedGainOnMarketableSecuritiesNetOfTax	331000	USD
CY2018	goss	Noncash Investing And Financing Activities Change In Unrealized Gain On Marketable Securities Net Of Tax NoncashInvestingAndFinancingActivitiesChangeInUnrealizedGainOnMarketableSecuritiesNetOfTax	-61000	USD
CY2020	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	15000	USD
CY2019	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	183000	USD
CY2018	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	0	USD
CY2020Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-577500000	USD
CY2019Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-334200000	USD
	goss	Funds Raised Through Preferred Equity Financing Convertible Note Financings And Completed Initial Public Offering FundsRaisedThroughPreferredEquityFinancingConvertibleNoteFinancingsAndCompletedInitialPublicOffering	942000000.0	USD
CY2020	us-gaap	Use Of Estimates UseOfEstimates	<div style="margin-top:10pt"><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 style="margin-top:10pt;text-indent:72pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of expenses during the reporting period. The most significant estimates in the Company’s consolidated financial statements relate to the allocation of the 2027 Notes into liability and equity components and accrued research and development expenses. These estimates and assumptions are based on current facts, historical experience and various other factors believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities and the recording of expenses that are not readily apparent from other sources. Actual results could differ from those estimates.</span></div>
CY2020	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	1	segment
CY2020Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	12194000	USD
CY2019Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	9282000	USD
CY2020Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	3633000	USD
CY2019Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	2354000	USD
CY2020Q4	goss	Accrued Consulting Fees Current AccruedConsultingFeesCurrent	1919000	USD
CY2019Q4	goss	Accrued Consulting Fees Current AccruedConsultingFeesCurrent	1337000	USD
CY2020Q4	us-gaap	Interest Payable Current InterestPayableCurrent	1094000	USD
CY2019Q4	us-gaap	Interest Payable Current InterestPayableCurrent	0	USD
CY2020Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	742000	USD
CY2019Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	1126000	USD
CY2020Q4	goss	Accrued Legal Fees Current AccruedLegalFeesCurrent	619000	USD
CY2019Q4	goss	Accrued Legal Fees Current AccruedLegalFeesCurrent	837000	USD
CY2020Q4	goss	Accrued Accounting Fees Current AccruedAccountingFeesCurrent	285000	USD
CY2019Q4	goss	Accrued Accounting Fees Current AccruedAccountingFeesCurrent	173000	USD
CY2020Q4	goss	Accrued In Process Research And Development Current AccruedInProcessResearchAndDevelopmentCurrent	225000	USD
CY2019Q4	goss	Accrued In Process Research And Development Current AccruedInProcessResearchAndDevelopmentCurrent	1600000	USD
CY2020Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	20711000	USD
CY2019Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	16709000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	26396000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	177000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	0	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	26573000	USD
CY2020Q4	us-gaap	Cash Equivalents At Carrying Value CashEquivalentsAtCarryingValue	18300000	USD
CY2019Q4	us-gaap	Cash Equivalents At Carrying Value CashEquivalentsAtCarryingValue	18700000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	26573000	USD
CY2020Q4	goss	Available For Sale Securities Debt Maturities After One Through Two Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughTwoYearsFairValue	0	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	26573000	USD
CY2020	us-gaap	Research And Development In Process ResearchAndDevelopmentInProcess	23380000	USD
CY2019	us-gaap	Research And Development In Process ResearchAndDevelopmentInProcess	3600000	USD
CY2018	us-gaap	Research And Development In Process ResearchAndDevelopmentInProcess	49659000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-186888000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-138342000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-116920000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	-56472000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	-41965000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	-30049000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-243360000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-180307000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-146969000	USD
CY2020	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	38900000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	77946000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	43626000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	14442000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	17372000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	9196000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	1131000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Goodwill And Intangible Assets DeferredTaxAssetsGoodwillAndIntangibleAssets	10939000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Goodwill And Intangible Assets DeferredTaxAssetsGoodwillAndIntangibleAssets	6597000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Goodwill And Intangible Assets DeferredTaxAssetsGoodwillAndIntangibleAssets	6267000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	4448000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	1388000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	0	USD
CY2020Q4	goss	Deferred Tax Assets Lease Liability DeferredTaxAssetsLeaseLiability	2383000	USD
CY2019Q4	goss	Deferred Tax Assets Lease Liability DeferredTaxAssetsLeaseLiability	2329000	USD
CY2018Q4	goss	Deferred Tax Assets Lease Liability DeferredTaxAssetsLeaseLiability	0	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	2137000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	1476000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation	834000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	16000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	383000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	154000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	115241000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	64995000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	22828000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Financing Arrangements DeferredTaxLiabilitiesFinancingArrangements	10592000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Financing Arrangements DeferredTaxLiabilitiesFinancingArrangements	0	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Financing Arrangements DeferredTaxLiabilitiesFinancingArrangements	0	USD
CY2020Q4	goss	Deferred Tax Liabilities Right Of Use Asset DeferredTaxLiabilitiesRightOfUseAsset	2215000	USD
CY2019Q4	goss	Deferred Tax Liabilities Right Of Use Asset DeferredTaxLiabilitiesRightOfUseAsset	2164000	USD
CY2018Q4	goss	Deferred Tax Liabilities Right Of Use Asset DeferredTaxLiabilitiesRightOfUseAsset	0	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	776000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	57000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	16000	USD
CY2020Q4	goss	Deferred Tax Liabilities Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxLiabilitiesTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	0	USD
CY2019Q4	goss	Deferred Tax Liabilities Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxLiabilitiesTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	0	USD
CY2018Q4	goss	Deferred Tax Liabilities Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxLiabilitiesTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	1057000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	13583000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	2221000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	1073000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	101658000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	62774000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	21755000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	0	USD
CY2019Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	0	USD
CY2018Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	0	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.2100
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.2100
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.2100
CY2020	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0
CY2019	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0
CY2018	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.1950
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.2212
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	-0.1317
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	-0.0276
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	-0.0381
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	-0.0077
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.0164
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.0184
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.0174
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	0.0181
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	0
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	0.026
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Research And Development EffectiveIncomeTaxRateReconciliationNondeductibleExpenseResearchAndDevelopment	0
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Research And Development EffectiveIncomeTaxRateReconciliationNondeductibleExpenseResearchAndDevelopment	0
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	5060000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Research And Development EffectiveIncomeTaxRateReconciliationNondeductibleExpenseResearchAndDevelopment	0.0392
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.0080
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.0085
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.0034
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0
CY2018	goss	Tax Cuts And Jobs Act Of2017 Decrease In Deferred Tax Asset Due To Transition Tax TaxCutsAndJobsActOf2017DecreaseInDeferredTaxAssetDueToTransitionTax	800000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	2754000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	408000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	2306000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	2346000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	408000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	2754000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	408000	USD
CY2020Q4	goss	Unrecognized Tax Benefits That Would Not Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldNotImpactEffectiveTaxRate	5100000	USD
CY2020	goss	Common Stock Voting Rights Number Of Votes Per Share CommonStockVotingRightsNumberOfVotesPerShare	1	vote
CY2020Q2	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	9433963	shares
CY2020Q2	us-gaap	Sale Of Stock Price Per Share SaleOfStockPricePerShare	13.25
CY2020Q2	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	117100000	USD
CY2020Q4	us-gaap	Shares Subject To Mandatory Redemption Settlement Terms Number Of Shares SharesSubjectToMandatoryRedemptionSettlementTermsNumberOfShares	1649348	shares
CY2019Q4	us-gaap	Shares Subject To Mandatory Redemption Settlement Terms Number Of Shares SharesSubjectToMandatoryRedemptionSettlementTermsNumberOfShares	4648526	shares
CY2018Q4	us-gaap	Shares Subject To Mandatory Redemption Settlement Terms Number Of Shares SharesSubjectToMandatoryRedemptionSettlementTermsNumberOfShares	7482032	shares
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	0	shares
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	0
CY2017	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P0Y
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	0	USD
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	5143551	shares
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	7.49
CY2018	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	0	shares
CY2018	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	0
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	36222	shares
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	4.85
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	5107329	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	7.51
CY2018	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P9Y8M12D
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	16343000	USD
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	4194624	shares
CY2019	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	20.11
CY2019	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	419593	shares
CY2019	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	4.87
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	344300	shares
CY2019	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	11.64
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	8538060	shares
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	13.67
CY2019	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P9Y
CY2019Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	35385000	USD
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	2712372	shares
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	13.78
CY2020	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	134803	shares
CY2020	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	3.96
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod	1714547	shares
CY2020	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	15.99
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	9401082	shares
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	13.42
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P8Y1M6D
CY2020Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.07
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	10182000	USD
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber	3749170	shares
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice	12.66
CY2020	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested And Expected To Vest Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageRemainingContractualTerm1	P7Y6M
CY2020Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Exercisable Aggregate Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue	6293000	USD
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	38748000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	20819000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	30947000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	8157000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	6639000	USD
CY2020Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	2623000	USD
CY2019Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	1214000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	5534000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	5425000	USD
CY2020	us-gaap	Depreciation Depreciation	1400000	USD
CY2019	us-gaap	Depreciation Depreciation	900000	USD
CY2018	us-gaap	Depreciation Depreciation	300000	USD
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P3Y4M24D
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	3615000	USD
CY2020	us-gaap	Short Term Lease Cost ShortTermLeaseCost	78000	USD
CY2020	us-gaap	Lease Cost LeaseCost	3693000	USD
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	3600000	USD
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	3000000.0	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	4273000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	3579000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	2063000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	2123000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	387000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	397000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	12822000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	1476000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	11346000	USD
CY2020Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	3633000	USD
CY2020Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	7713000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	11346000	USD
CY2020	us-gaap	Operating Lease Expense OperatingLeaseExpense	4000000.0	USD
CY2019	us-gaap	Operating Lease Expense OperatingLeaseExpense	3100000	USD
CY2018	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	1500000	USD

Files In Submission

Name	View Source	Status
0001728117-21-000019-index-headers.html	Edgar Link	pending
0001728117-21-000019-index.html	Edgar Link	pending
0001728117-21-000019.txt	Edgar Link	pending
0001728117-21-000019-xbrl.zip	Edgar Link	pending
exhibit1010.htm	Edgar Link	pending
exhibit1011.htm	Edgar Link	pending
exhibit231.htm	Edgar Link	pending
exhibit43.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
goss-20201231.htm	Edgar Link	pending
goss-20201231.xsd	Edgar Link	pending
goss-20201231x10kexx311.htm	Edgar Link	pending
goss-20201231x10kexx312.htm	Edgar Link	pending
goss-20201231x10kexx321.htm	Edgar Link	pending
goss-20201231x10kexx322.htm	Edgar Link	pending
goss-20201231_cal.xml	Edgar Link	unprocessable
goss-20201231_def.xml	Edgar Link	unprocessable
goss-20201231_g1.jpg	Edgar Link	pending
goss-20201231_g2.jpg	Edgar Link	pending
goss-20201231_g3.jpg	Edgar Link	pending
goss-20201231_htm.xml	Edgar Link	completed
goss-20201231_lab.xml	Edgar Link	unprocessable
goss-20201231_pre.xml	Edgar Link	unprocessable
MetaLinks.json	Edgar Link	pending
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
R11.htm	Edgar Link	pending
R12.htm	Edgar Link	pending
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R61.htm	Edgar Link	pending
R7.htm	Edgar Link	pending
R8.htm	Edgar Link	pending
R9.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending

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2019 Q4 Form 10-K Financial Statement

#000172811721000019 Filed on February 26, 2021

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$GOSS Gossamer Bio, Inc. Stock $goss

2019 Q4 Form 10-K Financial Statement

#000172811721000019 Filed on February 26, 2021

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Facts In Submission

Files In Submission

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Gossamer Bio, Inc. Stock $goss