Business Combination and Related Transactions - Schedule of Pro Forma Information, Adjustments (Details) - Velodyne - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2023
Business Acquisition [Line Items]
Net loss	$ (35,102)	$ (335,115)
An increase in amortization expense related to the fair value of acquired identifiable intangible assets, net of the amortization expense already reflected in actual historical results
Business Acquisition [Line Items]
Net loss	0	(277)
A decrease in expenses related to the transaction expenses
Business Acquisition [Line Items]
Net loss	0	6,058
A net increase in revenue related to the impact of the acceleration of the Amazon Warrant vesting recognized by Velodyne at the close of the Velodyne Merger transaction
Business Acquisition [Line Items]
Net loss	0	3,656
A decrease in expenses related to the impact of the acceleration of the Amazon Warrant vesting recognized by Velodyne at the close of the Velodyne Merger transaction
Business Acquisition [Line Items]
Net loss	0	26,704
Represents decrease in additional stock-based compensation expense related to Ouster employee terminations due to change in control
Business Acquisition [Line Items]
Net loss	0	6,383
Represents a decrease in severance expense in connection with the Velodyne Merger transaction
Business Acquisition [Line Items]
Net loss	$ 0	$ 10,586