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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	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Revenues by contract type and operating segment	$ 194,101	$ 193,574	$ 177,164
Data and Analytics Services [Member]
Disaggregation of Revenue [Line Items]
Revenues by contract type and operating segment	30,226	26,663	23,803
Data and Analytics Services [Member] | Time-and-Material Contract [Member]
Disaggregation of Revenue [Line Items]
Revenues by contract type and operating segment	18,541	18,732	18,919
Data and Analytics Services [Member] | Fixed-Price Contract [Member]
Disaggregation of Revenue [Line Items]
Revenues by contract type and operating segment	11,685	7,931	4,884
IT Staffing Services [Member]
Disaggregation of Revenue [Line Items]
Revenues by contract type and operating segment	163,875	166,911	153,361
IT Staffing Services [Member] | Time-and-Material Contract [Member]
Disaggregation of Revenue [Line Items]
Revenues by contract type and operating segment	163,875	$ 166,911	$ 153,361
IT Staffing Services [Member] | Fixed-Price Contract [Member]
Disaggregation of Revenue [Line Items]
Revenues by contract type and operating segment

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

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-Publisher FASB
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