Quarterly report pursuant to Section 13 or 15(d)

Classification of Compensation Expense Associated with Share-Based Payments (Detail)

v2.4.0.8
Classification of Compensation Expense Associated with Share-Based Payments (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]        
Stock-based compensation $ 301 $ 491 $ 887 $ 1,239
Cost of Revenue
       
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]        
Stock-based compensation 29 73 116 227
Sales and Marketing
       
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]        
Stock-based compensation 91 154 328 443
General and Administrative
       
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]        
Stock-based compensation 162 225 378 459
Engineering and Development
       
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]        
Stock-based compensation $ 19 $ 39 $ 65 $ 110