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Stock-Based Compensation - Additional Information (Detail)
$ / shares in Units, $ in Millions
1 Months Ended 12 Months Ended
Jun. 30, 2022
shares
Jun. 30, 2021
shares
Jun. 30, 2020
shares
Jun. 30, 2019
shares
Dec. 31, 2022
USD ($)
Period
$ / shares
shares
Dec. 31, 2021
USD ($)
$ / shares
shares
Dec. 31, 2020
USD ($)
$ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Total intrinsic value of options exercised | $         $ 1.1 $ 7.5 $ 7.9
Stock-based compensation, expected dividend yield         0.00%    
Weighted average grant-date fair value of stock options granted | $ / shares         $ 3.12 $ 3.51 $ 2.71
Stock Options              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock-based compensation expense expected to be recognized | $         $ 7.9    
Stock-based compensation, weighted average recognition period         2 years 3 months 18 days    
Stock-based compensation, expected dividend yield         0.00% 0.00% 0.00%
Restricted Stock Units (RSUs)              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock-based compensation expense expected to be recognized | $         $ 27.7    
Stock-based compensation, weighted average recognition period         1 year 9 months 18 days    
Employee Stock Purchase Plan              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock-based compensation, option to be granted at percentage of fair value of common stock         85.00%    
Employee Stock Purchase Plan, offering period         12 months    
Number of purchase periods within each offering period | Period         2    
Increase in shares of common stock authorized for issuance     1,500,000        
Aggregate number of shares of common stock reserved for future issuance         1,300,000    
Stock-based compensation, expected dividend yield         0.00% 0.00% 0.00%
Weighted average grant-date fair value of awards granted | $ / shares         $ 1.63 $ 2.21 $ 1.71
2008 Equity Incentive Plan              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock-based compensation, option to be granted at percentage of fair value of common stock           100.00%  
Increase in shares of common stock authorized for issuance 12,000,000 7,600,000 5,000,000.0 11,800,000      
Aggregate number of shares of common stock reserved for future issuance         38,600,000    
Stock-based compensation, award term           10 years  
Performance-based stock options, outstanding         1,400,000    
Outstanding options and other stock based awards         15,756,000 15,092,000  
Number of shares available for future issuance         14,300,000    
2008 Equity Incentive Plan | Stock Options              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock-based compensation, vesting period           4 years  
2008 Equity Incentive Plan | Restricted Stock Units (RSUs)              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Number of unvested Restricted Stock Units         8,497,000 6,690,000  
Total fair value | $         $ 15.0 $ 16.1 $ 6.8
Weighted average grant-date fair value of awards granted | $ / shares [1]         $ 5.55    
2008 Equity Incentive Plan | Performance-based Stock              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Employee Stock Purchase Plan, authorized shares for issuance           500,000  
2008 Equity Incentive Plan | Performance-based Cash Awards              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock option plan granted on cash award | $           $ 1.0  
2008 Equity Incentive Plan | Minimum | Restricted Stock Units (RSUs)              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock-based compensation, vesting period           3 years  
2008 Equity Incentive Plan | Maximum | Restricted Stock Units (RSUs)              
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]              
Stock-based compensation, vesting period           4 years  
[1] Includes shares issuable under performance-based restricted stock unit awards.