Revenue - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation of Revenue [Line Items]
Revenue	$ 7,978	$ 4,223	$ 19,600	$ 11,519
Revenue from contract with customer benchmark | Geographic Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue (as percent)	100.00%	100.00%	100.00%	100.00%
Revenue from contract with customer benchmark | Revenue Recognition Timing Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue (as percent)	100.00%	100.00%	100.00%	100.00%
Revenue from contract with customer benchmark | Segment Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue (as percent)	100.00%	100.00%	100.00%	100.00%
Autonomy Solutions
Disaggregation of Revenue [Line Items]
Revenue	$ 7,550	$ 3,481	$ 17,708	$ 9,587
Autonomy Solutions | Revenue from contract with customer benchmark | Segment Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue (as percent)	95.00%	82.00%	90.00%	83.00%
Component Sales
Disaggregation of Revenue [Line Items]
Revenue	$ 428	$ 742	$ 1,892	$ 1,932
Component Sales | Revenue from contract with customer benchmark | Segment Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue (as percent)	5.00%	18.00%	10.00%	17.00%
Recognized at a point in time
Disaggregation of Revenue [Line Items]
Revenue	$ 873	$ 1,286	$ 4,914	$ 2,076
Recognized at a point in time | Revenue from contract with customer benchmark | Revenue Recognition Timing Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue (as percent)	11.00%	30.00%	25.00%	18.00%
Recognized over time
Disaggregation of Revenue [Line Items]
Revenue	$ 7,105	$ 2,937	$ 14,686	$ 9,443
Recognized over time | Revenue from contract with customer benchmark | Revenue Recognition Timing Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue (as percent)	89.00%	70.00%	75.00%	82.00%
North America
Disaggregation of Revenue [Line Items]
Revenue	$ 5,713	$ 1,473	$ 12,313	$ 3,198
North America | Revenue from contract with customer benchmark | Geographic Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue (as percent)	72.00%	35.00%	63.00%	28.00%
Asia Pacific
Disaggregation of Revenue [Line Items]
Revenue	$ 0	$ 507	$ 475	$ 720
Asia Pacific | Revenue from contract with customer benchmark | Geographic Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue (as percent)	0.00%	12.00%	2.00%	6.00%
Europe and Middle East
Disaggregation of Revenue [Line Items]
Revenue	$ 2,265	$ 2,243	$ 6,812	$ 7,601
Europe and Middle East | Revenue from contract with customer benchmark | Geographic Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue (as percent)	28.00%	53.00%	35.00%	66.00%