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Significant Agreements and Contracts - Schedule of Contract Liability Activity (Details) - Chiesi Farmaceutici S.p.A And Chiesi USA, Inc. $ in Thousands | 12 Months Ended
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Dec. 31, 2024 USD ($)
Contract With Customer, Liability [Rollforward] |
Opening balance | $ 0
Payments received in advance | 159,536
Effect of exchange rate changes on contract liabilities | (2,103)
Ending balance | 55,919
Revenue from sale of US license |
Contract With Customer, Liability [Rollforward] |
Revenue | (78,947)
Revenue from sale of ROW license |
Contract With Customer, Liability [Rollforward] |
Revenue | (11,721)
Revenue from PAH research and development service performance obligations satisfied during reporting period |
Contract With Customer, Liability [Rollforward] |
Revenue | (9,555)
Revenue from PH-ILD research and development service performance obligations satisfied during reporting period |
Contract With Customer, Liability [Rollforward] |
Revenue | $ (1,291)

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- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479837/606-10-45-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-8 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479837/606-10-45-2 + Details
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- Definition Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-8 + Details
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- Details
Name: | srt_ProductOrServiceAxis=goss_USLicenseMember
Namespace Prefix: |
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- Details
Name: | srt_ProductOrServiceAxis=goss_ROWLicenseMember
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- Details
Name: | srt_ProductOrServiceAxis=goss_PAHResearchAndDevelopmentServicesPerformanceObligationsSatisfiedMember
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- Details
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