Quarterly report pursuant to Section 13 or 15(d)

Revenue - Revenues by Customers (Details)

v3.22.1
Revenue - Revenues by Customers (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Disaggregation of Revenue [Line Items]    
Total revenues $ 32,867 $ 31,698
NASA | Revenue from Contract with Customer Benchmark | Customer Concentration Risk    
Disaggregation of Revenue [Line Items]    
Total revenues 8,439 10,937
Boeing | Revenue from Contract with Customer Benchmark | Customer Concentration Risk    
Disaggregation of Revenue [Line Items]    
Total revenues 5,463 4,031
Air Force Research Laboratory | Revenue from Contract with Customer Benchmark | Customer Concentration Risk    
Disaggregation of Revenue [Line Items]    
Total revenues 0 3,344
Major Customers | Revenue from Contract with Customer Benchmark | Customer Concentration Risk    
Disaggregation of Revenue [Line Items]    
Total revenues $ 13,902 $ 18,312