Revenues - Revenues by Contract (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Disaggregation of Revenue [Line Items]
Revenues	$ 40,651	$ 40,219	$ 114,654	$ 112,100
Time and materials
Disaggregation of Revenue [Line Items]
Revenues	26,728	22,879	77,385	79,840
Firm fixed price
Disaggregation of Revenue [Line Items]
Revenues	9,812	17,340	24,764	32,260
Cost-plus
Disaggregation of Revenue [Line Items]
Revenues	$ 4,111	$ 0	$ 12,505	$ 0