Balance Sheet Components - Inventories, Net of Reserve (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Raw materials	$ 7,640	$ 6,585
Work-in-process	2,893	1,883
Finished goods	1,965	831
Total inventories	$ 12,498	$ 9,299

Inventory, Work In Process, Net of Reserves, Current And Noncurrent

No definition available.

Name:	vldr_InventoryWorkInProcessNetOfReservesCurrentAndNoncurrent
Namespace Prefix:	vldr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant