Fair Value Measurements - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Fair Value Disclosures [Line Items]
Revaluation of contingent consideration liability	$ (6,069)	$ (11,056)
Goodwill impairment		9,738
Info Trellis Inc [Member]
Fair Value Disclosures [Line Items]
Revaluation of contingent consideration liability	6,100	11,100
Goodwill impairment	$ 0	$ 9,700

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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