Related Parties (Tables)

12 Months Ended

Dec. 31, 2021

Related Party Transactions [Abstract]

Schedule of Related Party Transactions and Balances

Revenue, accounts receivable, and contract liabilities for stockholders of the Company who were also related parties were as follows (in thousands)—these stockholders no longer qualified as related parties in 2021:

	Year ended December 31,
	2021		2020
Prototype sales:
Stockholder A	$	—	$	60
Development contracts:
Stockholder B	$	—	$	100
Stockholder C	$	—	$	1,050

	Year ended December 31,
	2021		2020
Accounts receivable:
Stockholder A	$	—	$	22

	Year ended December 31,
	2021		2020
Contract liabilities (current):
Stockholder B	$	—	$	65
Stockholder D	$	—	$	500