Revenues - Revenues by Contract (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Disaggregation of Revenue [Line Items]
Total revenues	$ 33,121	$ 42,154
Time and materials
Disaggregation of Revenue [Line Items]
Total revenues	17,960	27,159
Firm fixed price
Disaggregation of Revenue [Line Items]
Total revenues	10,046	10,400
Cost-reimbursable
Disaggregation of Revenue [Line Items]
Total revenues	$ 5,115	$ 4,595