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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, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Disaggregation of Revenue [Line Items]        
Revenues by contract type and operating segment $ 63,150 $ 59,531 $ 185,022 $ 162,964
Data and Analytics Services [Member]        
Disaggregation of Revenue [Line Items]        
Revenues by contract type and operating segment 10,076 10,523 31,478 28,267
Data and Analytics Services [Member] | Time-and-Material Contract [Member]        
Disaggregation of Revenue [Line Items]        
Revenues by contract type and operating segment 6,524 6,021 19,568 17,792
Data and Analytics Services [Member] | Fixed-Price Contract [Member]        
Disaggregation of Revenue [Line Items]        
Revenues by contract type and operating segment 3,552 4,502 11,910 10,475
IT Staffing Services [Member]        
Disaggregation of Revenue [Line Items]        
Revenues by contract type and operating segment 53,074 49,008 153,544 134,697
IT Staffing Services [Member] | Time-and-Material Contract [Member]        
Disaggregation of Revenue [Line Items]        
Revenues by contract type and operating segment 53,074 49,008 153,544 134,697
IT Staffing Services [Member] | Fixed-Price Contract [Member]        
Disaggregation of Revenue [Line Items]        
Revenues by contract type and operating segment $ 0 $ 0 $ 0 $ 0