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General - Additional Information (Detail) $ in Millions | 12 Months Ended
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Dec. 31, 2020 USD ($) Segment | Dec. 31, 2019 USD ($) | Dec. 31, 2018
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] |  |  |
Number of operating segments | 1 |  |
Number of Reportable segment | 1 |  |
Trade receivables | $ | $ 236.6 | $ 203.0 |
Credit Concentration Risk | Revenue |  |  |
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] |  |  |
Percentage of revenue derived from distribution channels | 39.00% | 37.00% | 36.00%
Credit Concentration Risk | Revenue | First Channel Partner |  |  |
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] |  |  |
Percentage of revenue derived from distribution channels | 17.00% | 18.00% | 17.00%
Credit Concentration Risk | Revenue | Second Channel Partner |  |  |
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] |  |  |
Percentage of revenue derived from distribution channels | 22.00% | 19.00% | 19.00%

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