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Equity Plans and Stock-Based Compensation - Additional Information (Detail) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended
May. 31, 2014
Mar. 31, 2016
Mar. 31, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Stock-based compensation expense   $ 3,244 $ 1,954
Time Based Vesting Schedule      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Total unrecognized compensation cost related to non-vested equity awards   $ 22,100  
Total unrecognized compensation cost, weighted-average vesting period   2 years 7 months 6 days  
Performance Based Vesting Schedule      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Total unrecognized compensation cost related to non-vested equity awards   $ 5,900  
2014 Employee Stock Purchase Plan      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Shares issued to employees 50,000 40,670  
Shares remaining available for future purchases   9,330  
2014 Employee Stock Purchase Plan | The commencement of the offer period (generally, the sixteenth day in February or August)      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Purchase price per share as percentage of fair market value of common stock 85.00%    
2014 Employee Stock Purchase Plan | The exercise date, which is the last day of a purchase period (generally, the fifteenth day in February or August)      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Purchase price per share as percentage of fair market value of common stock 85.00%    
Restricted Stock Units (RSUs)      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Aggregate intrinsic value   $ 10,600  
Performance based Vesting Condition      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Shares underlying stock options and restricted stock units awards with performance-based vesting criteria   189,000  
Employee Stock Option      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Options vesting period   4 years  
Expiration period   10 years