Amazon Warrant (Details) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025 $ / shares shares	Jun. 30, 2025 $ / shares shares	Sep. 30, 2025 $ / shares shares	Feb. 10, 2023 USD ($) year $ / shares shares
ATM Agreement
Class of Warrant or Right [Line Items]
Sale of stock, number of shares issued in transaction (in shares)	1,097,863	3,522,177	4,620,040
Velodyne | Amazon Warrant | Expected Term | Valuation Technique, Option Pricing Model
Class of Warrant or Right [Line Items]
Warrants, fair value measurement inputs | year				6.98
Velodyne | Amazon Warrant | Price Volatility | Valuation Technique, Option Pricing Model
Class of Warrant or Right [Line Items]
Warrants, fair value measurement inputs				0.537
Velodyne | Amazon Warrant | Risk Free Interest Rate | Valuation Technique, Option Pricing Model
Class of Warrant or Right [Line Items]
Warrants, fair value measurement inputs				0.0386
Velodyne | Amazon Warrant | Expected dividend rate | Valuation Technique, Option Pricing Model
Class of Warrant or Right [Line Items]
Warrants, fair value measurement inputs				0
Amazoncom NV Investment Holdings LLLC | Velodyne | Amazon Warrant
Class of Warrant or Right [Line Items]
Warrants issued, number of preferred stock callable (in shares)	3,271,970		3,271,970	3,263,898
Warrants issued, exercise price (in dollars per share) | $ / shares	$ 50.57	$ 50.59	$ 50.57	$ 50.71
Number of shares issuable (in shares)	983	3,097
Class of warrant or right, vesting payments to be received | $				$ 100.0
Warrants vested during period (in shares)	170,958		341,358
Number of warrants vested (in shares)	2,501,662		2,501,662