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Share-based Compensation - Schedule of Components of Share-Based Compensation Expense (Detail) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2021 | Mar. 31, 2020
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |
Allocated share based compensation expense | $ 3,721 | $ 3,859
Stock options [Member] |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |
Allocated share based compensation expense | 661 | 304
Time-based Restricted Stock Awards and Units [Member] |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |
Allocated share based compensation expense | 1,727 | 2,421
Market-based Restricted Stock Units [Member] |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |
Allocated share based compensation expense | 897 | 670
Stock purchase plan [Member] |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |
Allocated share based compensation expense | 436 | 464
Cost of sales [Member] |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |
Allocated share based compensation expense | 178 | 181
Sales and marketing [Member] |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |
Allocated share based compensation expense | 717 | 696
General and administrative [Member] |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |
Allocated share based compensation expense | 2,529 | 2,530
Research and development [Member] |  |
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |
Allocated share based compensation expense | $ 297 | $ 452

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