Cover Page - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Mar. 23, 2023	Jun. 30, 2022
Document Information [Line Items]
Document Type	10-K
Document Annual Report	true
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
Entity Shell Company	false
Entity Public Float			$ 252.5
Entity Common Stock, Shares Outstanding		386,269,049
Entity Central Index Key	0001816581
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	FY
Amendment Flag	false
Document Period End Date	Dec. 31, 2022
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	NYSE
Warrants to purchase common stock
Document Information [Line Items]
Title of 12(b) Security	Warrants to purchase common stock
Trading Symbol	OUST WS
Security Exchange Name	NYSE
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	OUST WTA
Security Exchange Name	NYSEAMER