Revenues - Revenues by Contract (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Disaggregation of Revenue [Line Items]
Total revenues	$ 39,783	$ 38,459	$ 72,904	$ 80,613
Time and materials
Disaggregation of Revenue [Line Items]
Total revenues	23,377	21,122	41,337	48,281
Firm fixed price
Disaggregation of Revenue [Line Items]
Total revenues	11,639	12,577	21,685	22,977
Cost-reimbursable
Disaggregation of Revenue [Line Items]
Total revenues	$ 4,767	$ 4,760	$ 9,882	$ 9,355