Warrants - Narrative (Details) $ / shares in Units, $ in Thousands		1 Months Ended	12 Months Ended
	Feb. 10, 2023 USD ($) year day $ / shares shares	Aug. 31, 2020 USD ($) $ / shares shares	Dec. 31, 2024 USD ($) year $ / shares shares	Dec. 31, 2023 year shares	Mar. 11, 2021 USD ($) $ / shares shares	Mar. 11, 2020 $ / shares
Common Stock
Class of Warrant or Right [Line Items]
Proceeds from at-the-market offering, net of commissions and fees and issuance costs (in shares)			6,045,428	2,878,875
CLA
Class of Warrant or Right [Line Items]
Number of ordinary shares called by each warrant (in shares)					9,999,996
CLA | Conversion Of CLA Units To Ouster Common Stock
Class of Warrant or Right [Line Items]
Number of ordinary shares called by each warrant (in shares)		1
Warrant, conversion ratio					1
CLA | Conversion Of CLA Units To Public Warrant
Class of Warrant or Right [Line Items]
Number of ordinary shares called by each warrant (in shares)		0.5
Private Placement Warrants | Expected term (years) | Valuation Technique, Option Pricing Model
Class of Warrant or Right [Line Items]
Warrants, fair value measurement inputs | year			1.19	2.19
Private Placement Warrants | Expected volatility | Valuation Technique, Option Pricing Model
Class of Warrant or Right [Line Items]
Warrants, fair value measurement inputs			0.9500	0.9400
Private Placement Warrants | Risk-free interest rate | Valuation Technique, Option Pricing Model
Class of Warrant or Right [Line Items]
Warrants, fair value measurement inputs			0.0418	0.0419
Public Warrants
Class of Warrant or Right [Line Items]
Warrant liabilities | $					$ 17,900
Redeem of warrants, price (in dollars per share) | $ / shares		$ 0.10
Exercise of warrant, threshold common stock price (in dollars per share) | $ / shares		$ 180.00
Class of warrant or right, exercisable, threshold trading days		20 days
Class of warrant or right, exercisable, threshold trading-day period		30 days
Public Warrants | Velodyne Lidar, Inc.
Class of Warrant or Right [Line Items]
Warrants issued, exercise price (in dollars per share) | $ / shares	$ 140.20
Number of ordinary shares called by each warrant (in shares)	0.06153
Redeem of warrants, price (in dollars per share) | $ / shares	$ 0.10
Exercise of warrant, threshold common stock price (in dollars per share) | $ / shares	$ 219.41
Class of warrant or right, exercisable, threshold trading days	20 days
Class of warrant or right, exercisable, threshold trading-day period	30 days
Number of warrants acquired in business combination (in shares)	5,973,170
Number of business days | day	3
Public Warrants | Conversion of Warrant to Ouster Common Stock
Class of Warrant or Right [Line Items]
Number of ordinary shares called by each warrant (in shares)					0.1
Public Warrants | CLA
Class of Warrant or Right [Line Items]
Warrant, exercisable, threshold period		12 months
Warrant, expiration period		5 years
Warrants issued, exercise price (in dollars per share) | $ / shares						$ 115.00
Amazon Warrant | Velodyne Lidar, Inc.
Class of Warrant or Right [Line Items]
Business combination, consideration transferred, warrants and rights assumed | $	$ 8,600
Amazon Warrant | Velodyne Lidar, Inc. | Expected term (years) | Valuation Technique, Option Pricing Model
Class of Warrant or Right [Line Items]
Warrants, fair value measurement inputs | year	6.98
Amazon Warrant | Velodyne Lidar, Inc. | Expected volatility | Valuation Technique, Option Pricing Model
Class of Warrant or Right [Line Items]
Warrants, fair value measurement inputs	0.537
Amazon Warrant | Velodyne Lidar, Inc. | Risk-free interest rate | Valuation Technique, Option Pricing Model
Class of Warrant or Right [Line Items]
Warrants, fair value measurement inputs	0.0386
Amazon Warrant | Velodyne Lidar, Inc. | Expected dividend yield | Valuation Technique, Option Pricing Model
Class of Warrant or Right [Line Items]
Warrants, fair value measurement inputs	0
Amazon Warrant, Common Stock Vested | Velodyne Lidar, Inc.
Class of Warrant or Right [Line Items]
Business combination, consideration transferred, warrants and rights assumed | $	$ 8,600
Sponsor | Private Placement Warrants
Class of Warrant or Right [Line Items]
Warrant liabilities | $		$ 19,400
Sponsor | Private Placement Warrants | Conversion of Warrant to Ouster Common Stock
Class of Warrant or Right [Line Items]
Number of ordinary shares called by each warrant (in shares)					0.1
Sponsor | Private Placement Warrants | Sponsor
Class of Warrant or Right [Line Items]
Warrants issued, number of preferred stock callable (in shares)		6,000,000
Warrant, aggregated purchase price | $		$ 6,000
Warrant, exercisable, threshold period		12 months
Warrant, expiration period		5 years
Warrants issued, exercise price (in dollars per share) | $ / shares					$ 115.00
Amazon.com NV Investment Holdings LLLC | Amazon Warrant | Velodyne Lidar, Inc.
Class of Warrant or Right [Line Items]
Warrants issued, number of preferred stock callable (in shares)	3,263,898		3,267,890
Warrants issued, exercise price (in dollars per share) | $ / shares	$ 50.71		$ 50.64
Number of shares issuable (in shares)			3,374
Vesting schedule of warrant, percent	50.00%
Class of warrant or right, vesting payments to be received | $	$ 100,000
Warrants vested during period (in shares)			226,691
Warrant vested, noncash reduction to revenue | $			$ 900
Amazon.com NV Investment Holdings LLLC | Amazon Warrant, Common Stock Vested | Velodyne Lidar, Inc.
Class of Warrant or Right [Line Items]
Class of warrant or right, number of common shares vested (in shares)	1,848,694
Amazon.com NV Investment Holdings LLLC | Amazon Warrant, Common Stock Unvested | Velodyne Lidar, Inc.
Class of Warrant or Right [Line Items]
Class of warrant, unvested (in shares)	1,107,586
Number of warrants vested (in shares)			2,160,304