Revenue - Summary of Disaggregated Revenue by Geographic Region (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation Of Revenue [Line Items]
Revenue	$ 9,265	$ 4,843	$ 1,384
% of Revenue	100.00%	100.00%	100.00%
Recognized at a point in time [Member]
Disaggregation Of Revenue [Line Items]
Revenue	$ 1,776	$ 1,534	$ 819
% of Revenue	19.00%	32.00%	59.00%
Recognized over time [Member]
Disaggregation Of Revenue [Line Items]
Revenue	$ 7,489	$ 3,309	$ 565
% of Revenue	81.00%	68.00%	41.00%
North America [Member]
Disaggregation Of Revenue [Line Items]
Revenue	$ 8,816	$ 4,225	$ 542
% of Revenue	95.00%	88.00%	39.00%
Europe [Member]
Disaggregation Of Revenue [Line Items]
Revenue	$ 232	$ 497	$ 842
% of Revenue	3.00%	10.00%	61.00%
Asia [Member]
Disaggregation Of Revenue [Line Items]
Revenue	$ 217	$ 121	$ 0
% of Revenue	2.00%	2.00%	0.00%