Revenue from Contracts with Customers - Summary of Disaggregation of Our Revenues by Contract Type and Operating Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Disaggregation of Revenue [Line Items]
Revenues by contract type and operating segment	$ 47,779	$ 63,150	$ 155,046	$ 185,022
Data and Analytics Services [Member]
Disaggregation of Revenue [Line Items]
Revenues by contract type and operating segment	8,038	10,076	26,206	31,478
Data and Analytics Services [Member] | Time-and-Material Contract [Member]
Disaggregation of Revenue [Line Items]
Revenues by contract type and operating segment	5,888	6,524	19,027	19,568
Data and Analytics Services [Member] | Fixed-Price Contract [Member]
Disaggregation of Revenue [Line Items]
Revenues by contract type and operating segment	2,150	3,552	7,179	11,910
IT Staffing Services [Member]
Disaggregation of Revenue [Line Items]
Revenues by contract type and operating segment	39,741	53,074	128,840	153,544
IT Staffing Services [Member] | Time-and-Material Contract [Member]
Disaggregation of Revenue [Line Items]
Revenues by contract type and operating segment	39,741	53,074	128,840	153,544
IT Staffing Services [Member] | Fixed-Price Contract [Member]
Disaggregation of Revenue [Line Items]
Revenues by contract type and operating segment	$ 0	$ 0	$ 0	$ 0