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Business Combinations - Summary of Unaudited Pro Forma Results (Detail) - Amber Leaf Partners Inc [Member] - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Revenue	$ 202,842	$ 204,846	$ 187,956
Net income	$ 10,594	$ 12,119	$ 7,631
Earnings per share-diluted	$ 0.89	$ 1.08	$ 0.68

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The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

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