Revenue - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Disaggregation of Revenue [Line Items]
Revenue	$ 6,309	$ 3,424	$ 11,622	$ 7,296
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	$ 5,822	$ 2,809	$ 10,158	$ 6,106
Autonomy Solutions | Revenue from contract with customer benchmark | Segment Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue (as percent)	92.00%	82.00%	87.00%	84.00%
Component Sales
Disaggregation of Revenue [Line Items]
Revenue	$ 487	$ 615	$ 1,464	$ 1,190
Component Sales | Revenue from contract with customer benchmark | Segment Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue (as percent)	8.00%	18.00%	13.00%	16.00%
Recognized at a point in time
Disaggregation of Revenue [Line Items]
Revenue	$ 1,988	$ 182	$ 4,041	$ 790
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)	32.00%	5.00%	35.00%	11.00%
Recognized over time
Disaggregation of Revenue [Line Items]
Revenue	$ 4,321	$ 3,242	$ 7,581	$ 6,506
Recognized over time | Revenue from contract with customer benchmark | Revenue Recognition Timing Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue (as percent)	68.00%	95.00%	65.00%	89.00%
North America
Disaggregation of Revenue [Line Items]
Revenue	$ 4,061	$ 640	$ 6,600	$ 1,725
North America | Revenue from contract with customer benchmark | Geographic Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue (as percent)	64.00%	19.00%	57.00%	24.00%
Asia Pacific
Disaggregation of Revenue [Line Items]
Revenue	$ 154	$ 205	$ 475	$ 213
Asia Pacific | Revenue from contract with customer benchmark | Geographic Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue (as percent)	2.00%	6.00%	4.00%	3.00%
Europe and Middle East
Disaggregation of Revenue [Line Items]
Revenue	$ 2,094	$ 2,579	$ 4,547	$ 5,358
Europe and Middle East | Revenue from contract with customer benchmark | Geographic Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue (as percent)	33.00%	75.00%	39.00%	73.00%