Quarterly report pursuant to Section 13 or 15(d)

Stock Based Compensation - Additional Information (Detail)

v3.4.0.3
Stock Based Compensation - Additional Information (Detail) - USD ($)
3 Months Ended
Jan. 01, 2016
Mar. 31, 2016
Mar. 31, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Stock-based compensation expense   $ 843,000 $ 1,421,000
Unrecognized compensation cost related to unvested stock-based awards granted to employees under the stock option plans   $ 6,300,000  
Unrecognized compensation cost related to unvested stock-based awards granted to employees under the stock option plans, period for recognition   3 years  
Stock options exercised   0  
Total intrinsic value of stock options exercised     200,000
Cash received from stock option exercises     100,000
Tax benefit realized upon exercise of option   $ 0 $ 0
2014 Equity Incentive Plan      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Remaining shares available for issuance   931,583  
2004 Employee Stock Purchase Plan      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Remaining shares available for issuance   177,471  
Additional shares authorized for issuance 100,000    
Plan participants purchased shares   49,366  
Average purchase price under 2004 Employee Stock Purchase Plan   $ 0.24  
Cash proceeds   $ 12,000