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Goodwill and Other Intangible Assets, net - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Oct. 01, 2020	Jul. 13, 2017	Jun. 15, 2015
Goodwill and Intangible Assets [Line Items]
Goodwill	$ 32,510	$ 26,106
Goodwill impairment			$ 9,738
Amortization expense	$ 2,790	$ 2,688	2,727
Hudson IT [Member]
Goodwill and Intangible Assets [Line Items]
Goodwill						$ 8,400
Info Trellis Inc [Member]
Goodwill and Intangible Assets [Line Items]
Goodwill					$ 27,400
Goodwill impairment			$ 9,700
Amber Leaf Partners Inc [Member]
Goodwill and Intangible Assets [Line Items]
Goodwill				$ 6,404

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- Definition

Goodwill And Intangible Assets [Line Items]

+ References

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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