Revenues - Concentration of Risk (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Concentration Risk [Line Items]
Revenues	$ 37,613	$ 36,311	$ 74,003	$ 71,881
Percent of total revenues	100.00%	100.00%	100.00%	100.00%
Cyber and Engineering
Concentration Risk [Line Items]
Revenues	$ 18,618	$ 20,251	$ 35,951	$ 38,810
Analytics
Concentration Risk [Line Items]
Revenues	18,995	16,060	38,052	33,071
Customer Concentration Risk | Revenue Benchmark | Customer A
Concentration Risk [Line Items]
Revenues	$ 7,326	$ 8,167	$ 14,590	$ 16,509
Percent of total revenues	19.00%	23.00%	20.00%	23.00%
Customer Concentration Risk | Revenue Benchmark | Customer A | Cyber and Engineering
Concentration Risk [Line Items]
Revenues	$ 7,326	$ 8,167	$ 14,590	$ 16,509
Customer Concentration Risk | Revenue Benchmark | Customer A | Analytics
Concentration Risk [Line Items]
Revenues	0	0	0	0
Customer Concentration Risk | Revenue Benchmark | Customer B
Concentration Risk [Line Items]
Revenues	$ 4,405	$ 3,664	$ 8,902	$ 7,419
Percent of total revenues	12.00%	10.00%	12.00%	10.00%
Customer Concentration Risk | Revenue Benchmark | Customer B | Cyber and Engineering
Concentration Risk [Line Items]
Revenues	$ 4,405	$ 3,664	$ 8,902	$ 7,419
Customer Concentration Risk | Revenue Benchmark | Customer B | Analytics
Concentration Risk [Line Items]
Revenues	0	0	0	0
Customer Concentration Risk | Revenue Benchmark | Customer C
Concentration Risk [Line Items]
Revenues	$ 7,577	$ 0	$ 12,928	$ 0
Percent of total revenues	20.00%	0.00%	17.00%	0.00%
Customer Concentration Risk | Revenue Benchmark | Customer C | Cyber and Engineering
Concentration Risk [Line Items]
Revenues	$ 0	$ 0	$ 0	$ 0
Customer Concentration Risk | Revenue Benchmark | Customer C | Analytics
Concentration Risk [Line Items]
Revenues	7,577	0	12,928	0
Customer Concentration Risk | Revenue Benchmark | All others
Concentration Risk [Line Items]
Revenues	$ 18,305	$ 24,480	$ 37,583	$ 47,953
Percent of total revenues	49.00%	67.00%	51.00%	67.00%
Customer Concentration Risk | Revenue Benchmark | All others | Cyber and Engineering
Concentration Risk [Line Items]
Revenues	$ 6,887	$ 8,420	$ 12,459	$ 14,882
Customer Concentration Risk | Revenue Benchmark | All others | Analytics
Concentration Risk [Line Items]
Revenues	$ 11,418	$ 16,060	$ 25,124	$ 33,071