Balance Sheet Components - Narrative (Details) - USD ($)		3 Months Ended		12 Months Ended
	Feb. 10, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Short-term investments				$ 126,480,000	$ 139,158,000
Inventory write-down				2,080,000	10,047,000
Insurance receivable				2,000,000	23,375,000
Depreciation				3,200,000	10,400,000
Goodwill impairment charges		$ 67,300,000	$ 99,400,000	0	166,675,000
Goodwill					0	$ 51,152,000
Amortization of intangible assets				6,600,000	6,700,000
Moradpour v. Velodyne Lidar, Inc., et al.
Property, Plant and Equipment [Line Items]
Insurance receivable					23,400,000
Velodyne Lidar, Inc.
Property, Plant and Equipment [Line Items]
Consideration transferred	$ 306,602,000
Goodwill	115,523,000
Velodyne Lidar, Inc. | Amazon Warrant
Property, Plant and Equipment [Line Items]
Business combination, consideration transferred, warrants and rights assumed	$ 8,600,000
Cost of Revenue
Property, Plant and Equipment [Line Items]
Inventory write-down				$ 2,100,000	$ 10,000,000