Revenue from Contracts with Clients - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Disaggregation of Revenue [Line Items]
Revenue	$ 109,571	$ 96,604	$ 317,537	$ 285,237
Revenue Benchmark | Geographic Concentration Risk
Disaggregation of Revenue [Line Items]
Percent of Total Revenue	100.00%	100.00%	100.00%	100.00%
Americas
Disaggregation of Revenue [Line Items]
Revenue	$ 57,875	$ 51,362	$ 166,666	$ 147,701
Americas | Revenue Benchmark | Geographic Concentration Risk
Disaggregation of Revenue [Line Items]
Percent of Total Revenue	52.70%	53.10%	52.40%	51.70%
Middle East/Asia/Pacific
Disaggregation of Revenue [Line Items]
Revenue	$ 25,378	$ 21,621	$ 75,892	$ 63,320
Middle East/Asia/Pacific | Revenue Benchmark | Geographic Concentration Risk
Disaggregation of Revenue [Line Items]
Percent of Total Revenue	23.20%	22.40%	23.90%	22.20%
Europe
Disaggregation of Revenue [Line Items]
Revenue	$ 16,284	$ 13,897	$ 46,220	$ 44,942
Europe | Revenue Benchmark | Geographic Concentration Risk
Disaggregation of Revenue [Line Items]
Percent of Total Revenue	14.90%	14.40%	14.60%	15.80%
Africa
Disaggregation of Revenue [Line Items]
Revenue	$ 10,034	$ 9,724	$ 28,759	$ 29,274
Africa | Revenue Benchmark | Geographic Concentration Risk
Disaggregation of Revenue [Line Items]
Percent of Total Revenue	9.20%	10.10%	9.10%	10.30%
Fixed Price
Disaggregation of Revenue [Line Items]
Revenue	$ 22,289	$ 18,194	$ 66,132	$ 49,052
Fixed Price | Americas
Disaggregation of Revenue [Line Items]
Revenue	6,068	5,398	23,064	14,778
Fixed Price | Middle East/Asia/Pacific
Disaggregation of Revenue [Line Items]
Revenue	3,507	773	12,162	7,000
Fixed Price | Europe
Disaggregation of Revenue [Line Items]
Revenue	8,923	10,898	22,819	25,247
Fixed Price | Africa
Disaggregation of Revenue [Line Items]
Revenue	3,791	1,125	8,087	2,027
T&M
Disaggregation of Revenue [Line Items]
Revenue	87,282	78,410	251,405	236,185
T&M | Americas
Disaggregation of Revenue [Line Items]
Revenue	51,807	45,964	143,602	132,923
T&M | Middle East/Asia/Pacific
Disaggregation of Revenue [Line Items]
Revenue	21,871	20,848	63,730	56,320
T&M | Europe
Disaggregation of Revenue [Line Items]
Revenue	7,361	2,999	23,401	19,695
T&M | Africa
Disaggregation of Revenue [Line Items]
Revenue	$ 6,243	$ 8,599	$ 20,672	$ 27,247