General - Additional Information (Detail) $ in Millions	12 Months Ended
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%

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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