Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2026	Mar. 31, 2025
Disaggregation of Revenue [Line Items]
Total	$ 59,265	$ 89,212	$ 128,158	$ 179,994
Prime Contractor
Disaggregation of Revenue [Line Items]
Total	54,271	81,755	118,726	164,859
Subcontractor
Disaggregation of Revenue [Line Items]
Total	4,994	7,457	9,432	15,135
Time and Materials
Disaggregation of Revenue [Line Items]
Total	21,348	46,339	51,954	95,741
Firm Fixed Price
Disaggregation of Revenue [Line Items]
Total	23,957	23,291	48,245	46,529
Cost Reimbursable
Disaggregation of Revenue [Line Items]
Total	13,960	19,582	27,959	37,724
Department of Health and Human Services | Revenue from Contract with Customer | Customer concentration
Disaggregation of Revenue [Line Items]
Total	32,495	44,590	67,125	86,745
Department of Veterans Affairs | Revenue from Contract with Customer | Customer concentration
Disaggregation of Revenue [Line Items]
Total	19,738	28,696	46,649	62,795
Department of Defense | Revenue from Contract with Customer | Customer concentration
Disaggregation of Revenue [Line Items]
Total	6,830	14,711	14,056	28,066
Other | Revenue from Contract with Customer | Customer concentration
Disaggregation of Revenue [Line Items]
Total	$ 202	$ 1,215	$ 328	$ 2,388