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Goodwill and Other Intangible Assets, net - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2018	Dec. 31, 2022	Oct. 01, 2020	Jul. 13, 2017	Jun. 15, 2015
Goodwill and Intangible Assets [Line Items]
Goodwill	$ 32,510		$ 32,510			$ 32,510
Amortization expense	$ 693	$ 791	$ 2,079	$ 2,375
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							$ 6,400

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- Definition

Goodwill And Intangible Assets [Line Items]

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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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