Revenue - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Disaggregation of Revenue [Line Items]
Service revenue	$ 50,987	$ 58,478	$ 163,824	$ 173,338
Service revenue, percent	97.00%	100.00%	99.00%	100.00%
Grant revenue	$ 1,450	$ 0	$ 1,450	$ 0
Grant revenue, percent	3.00%	0.00%	1.00%	0.00%
Total revenue	$ 52,437	$ 58,478	$ 165,274	$ 173,338
Total revenue, percent	100.00%	100.00%	100.00%	100.00%
Fixed price
Disaggregation of Revenue [Line Items]
Service revenue	$ 30,275	$ 23,097	$ 95,992	$ 52,759
Service revenue, percent	58.00%	39.00%	58.00%	30.00%
Cost reimbursable
Disaggregation of Revenue [Line Items]
Service revenue	$ 19,190	$ 33,844	$ 62,877	$ 115,581
Service revenue, percent	36.00%	58.00%	38.00%	67.00%
Time and materials
Disaggregation of Revenue [Line Items]
Service revenue	$ 1,522	$ 1,537	$ 4,955	$ 4,998
Service revenue, percent	3.00%	3.00%	3.00%	3.00%