Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Disaggregation of Revenue and Additional Information (Details)

v3.22.2.2
Summary of Significant Accounting Policies - Disaggregation of Revenue and Additional Information (Details)
mi² in Thousands, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2022
USD ($)
Sep. 30, 2021
USD ($)
Sep. 30, 2022
USD ($)
mi²
Sep. 30, 2021
USD ($)
Revenue Summary        
Revenues $ 11,131 $ 6,257 $ 20,079 $ 16,771
Revenues recognized     $ (2,377)  
Product warranty period     5 years  
Warranty area covered | mi²     60  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-10-01        
Revenue Summary        
Revenue remaining performance obligation $ 2,000   $ 2,000  
Revenue remaining performance obligation (in years) 3 months   3 months  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-10-01 | Long-Term Contract with Customer        
Revenue Summary        
Revenue remaining performance obligation $ 206   $ 206  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01        
Revenue Summary        
Revenue remaining performance obligation $ 8,800   $ 8,800  
Revenue remaining performance obligation (in years) 12 months   12 months  
Selling, general and administrative        
Revenue Summary        
Advertising costs $ 179 64 $ 422 116
ZEVs        
Revenue Summary        
Revenues 10,570 5,588 18,633 15,084
Zero-emission powertrains        
Revenue Summary        
Revenues 0 0 336 218
Other        
Revenue Summary        
Revenues $ 561 $ 669 $ 1,110 $ 1,469