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Goodwill and Other Intangible Assets - Components of Identifiable Intangible assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Intangible Assets, Accumulated Amortization	$ 11,169	$ 8,379
Total Intangible Assets, Gross Carrying Value	33,099	28,429
Total Intangible Assets, Net Carrying Value	$ 21,930	$ 20,050
Client Relationships [Member] | IT Staffing Services [Member]
Amortization Period (In Years)	12 years	12 years
Intangible Assets, Gross Carrying Value	$ 7,999	$ 7,999
Intangible Assets, Accumulated Amortization	3,694	3,027
Intangible Assets, Net Carrying Value	$ 4,305	$ 4,972
Client Relationships [Member] | Data and Analytics Services [Member]
Amortization Period (In Years)	12 years	12 years
Intangible Assets, Gross Carrying Value	$ 19,641	$ 16,671
Intangible Assets, Accumulated Amortization	4,866	3,415
Intangible Assets, Net Carrying Value	$ 14,775	$ 13,256
Covenant Not-to-Compete [Member] | IT Staffing Services [Member]
Amortization Period (In Years)	5 years	5 years
Intangible Assets, Gross Carrying Value	$ 319	$ 319
Intangible Assets, Accumulated Amortization	$ 319	290
Intangible Assets, Net Carrying Value		$ 29
Covenant Not-to-Compete [Member] | Data and Analytics Services [Member]
Amortization Period (In Years)	5 years	5 years
Intangible Assets, Gross Carrying Value	$ 1,201	$ 761
Intangible Assets, Accumulated Amortization	548	374
Intangible Assets, Net Carrying Value	$ 653	$ 387
Trade Name [Member] | IT Staffing Services [Member]
Amortization Period (In Years)	3 years	3 years
Intangible Assets, Gross Carrying Value	$ 249	$ 249
Intangible Assets, Accumulated Amortization	$ 249	$ 249
Trade Name [Member] | Data and Analytics Services [Member]
Amortization Period (In Years)	5 years	5 years
Intangible Assets, Gross Carrying Value	$ 1,711	$ 1,221
Intangible Assets, Accumulated Amortization	869	600
Intangible Assets, Net Carrying Value	$ 842	$ 621
Technology [Member] | Data and Analytics Services [Member]
Amortization Period (In Years)	7 years	7 years
Intangible Assets, Gross Carrying Value	$ 1,979	$ 1,209
Intangible Assets, Accumulated Amortization	624	424
Intangible Assets, Net Carrying Value	$ 1,355	$ 785

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
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- Definition

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 928
-SubTopic 340
-Section 50
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-Publisher FASB
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Amount before accumulated amortization of intangible assets, excluding goodwill.

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Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

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