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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 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Disaggregation of Revenue [Line Items]        
Revenues by contract type and operating segment $ 62,117 $ 53,658 $ 121,872 $ 103,433
Data and Analytics Services [Member]        
Disaggregation of Revenue [Line Items]        
Revenues by contract type and operating segment 11,250 8,950 21,402 17,744
Data and Analytics Services [Member] | Time-and-Material Contract [Member]        
Disaggregation of Revenue [Line Items]        
Revenues by contract type and operating segment 6,863 5,917 13,044 11,771
Data and Analytics Services [Member] | Fixed-Price Contract [Member]        
Disaggregation of Revenue [Line Items]        
Revenues by contract type and operating segment 4,387 3,033 8,358 5,973
IT Staffing Services [Member]        
Disaggregation of Revenue [Line Items]        
Revenues by contract type and operating segment 50,867 44,708 100,470 85,689
IT Staffing Services [Member] | Time-and-Material Contract [Member]        
Disaggregation of Revenue [Line Items]        
Revenues by contract type and operating segment 50,867 44,708 100,470 85,689
IT Staffing Services [Member] | Fixed-Price Contract [Member]        
Disaggregation of Revenue [Line Items]        
Revenues by contract type and operating segment $ 0 $ 0 $ 0 $ 0