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Cover Page - USD ($) $ in Millions	12 Months Ended
Cover Page - USD ($) $ in Millions	Dec. 31, 2024	Mar. 17, 2025	Jun. 28, 2024
Document Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2024
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	001-39463
Entity Registrant Name	Ouster, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	86-2528989
Entity Address, Address Line One	350 Treat Avenue
Entity Address, City or Town	San Francisco
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94110
City Area Code	415
Local Phone Number	949-0108
Title of 12(g) Security
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	false
Document Financial Statement Error Correction	false
Entity Shell Company	false
Entity Public Float			$ 441.1
Entity Common Stock, Shares Outstanding		53,765,990
Documents Incorporated by Reference	Documents Incorporated by Reference: Specifically identified portions of the registrant’s definitive proxy statement relating to its 2025 annual meeting of stockholders are incorporated by reference in Part III of this Annual Report on Form 10-K where indicated. The registrant's definitive proxy statement will be filed with the U.S. Securities and Exchange Commission (the “SEC”) within 120 days after the end of the registrant’s fiscal year ended December 31, 2024.
Entity Central Index Key	0001816581
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	FY
Amendment Flag	false
Common stock, $0.0001 par value per share
Document Information [Line Items]
Title of 12(b) Security	Common stock, $0.0001 par value per share
Trading Symbol	OUST
Security Exchange Name	NASDAQ
Warrants to purchase common stock expiring 2026
Document Information [Line Items]
Title of 12(b) Security	Warrants to purchase common stock expiring 2026
Trading Symbol	OUSTZ
Security Exchange Name	NASDAQ
Warrants to purchase common stock expiring 2025
Document Information [Line Items]
Title of 12(b) Security	Warrants to purchase common stock expiring 2025
Trading Symbol	OUSTW
Security Exchange Name	NASDAQ