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Fair Value Measurements - Additional Information (Detail) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Fair Value Disclosures [Line Items] |  |  |
Revaluation of contingent consideration liability |  | $ (6,069,000) | $ (11,056,000)
Fair value of contingent consideration | $ 2,882,000 |  |
Info Trellis Inc [Member] |  |  |
Fair Value Disclosures [Line Items] |  |  |
Revaluation of contingent consideration liability |  | $ 6,100,000 | $ 11,100,000
AmberLeaf [Member] |  |  |
Fair Value Disclosures [Line Items] |  |  |
Revaluation of contingent consideration liability | 0 |  |
Fair value of contingent consideration | $ 2,900,000 |  |

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