Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Effects of Stock-Based Compensation Related to Stock Option Awards (Detail)

v3.7.0.1
Stock-Based Compensation - Effects of Stock-Based Compensation Related to Stock Option Awards (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]    
Total stock-based compensation $ 435 $ 534
Cost of Revenues    
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]    
Total stock-based compensation 59 69
Research and Development    
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]    
Total stock-based compensation 50 50
General and Administrative    
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]    
Total stock-based compensation 300 387
Sales and Marketing    
Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items]    
Total stock-based compensation $ 26 $ 28