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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
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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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