Annual report pursuant to Section 13 and 15(d)

Related Party Transactions (Details)

v3.20.4
Related Party Transactions (Details) - USD ($)
$ in Thousands
1 Months Ended 12 Months Ended
Sep. 30, 2017
Dec. 31, 2020
Dec. 31, 2019
Related Party Transaction [Line Items]      
Proceeds from sale of inventory parts and tooling   $ 45  
Angel Pond Capital LLC      
Related Party Transaction [Line Items]      
Consulting agreement term 1 year    
Aggregate payments     $ 30