Cover Page - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Feb. 25, 2022	Jun. 30, 2021
Document Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2021
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	001-04321
Entity Registrant Name	ORIGIN MATERIALS, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	87-1388928
Entity Address, Address Line One	930 Riverside Parkway
Entity Address, Address Line Two	Suite 10
Entity Address, City or Town	West Sacramento,
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	95605
City Area Code	916
Local Phone Number	231-9329
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Small Business	true
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	false
Entity Shell Company	false
Entity Public Float			$ 899.5
Entity Bankruptcy Proceedings, Reporting Current	false
Entity Common Stock, Shares Outstanding		141,301,569
Documents Incorporated by Reference	Specified portions of the registrant’s definitive proxy statement to be issued in conjunction with the registrant’s 2022 Annual Meeting of Stockholders, which is expected to be filed not later than 120 days after the registrant’s fiscal year ended December 31, 2021 ("Proxy Statement"), are incorporated by reference into Part III of this Annual Report. Except as expressly incorporated by reference, the registrant’s Proxy Statement shall not be deemed to be a part of this Annual Report.
Amendment Flag	false
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Entity Central Index Key	0001802457
Entity Filer Category	Large Accelerated Filer
Common Stock
Document Information [Line Items]
Title of 12(b) Security	Common Stock, $0.0001 par value per share
Trading Symbol	ORGN
Security Exchange Name	NASDAQ
Warrant
Document Information [Line Items]
Title of 12(b) Security	Warrants
Trading Symbol	ORGNW
Security Exchange Name	NASDAQ