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, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Recognized Share Based Compensation Expense [Line Items]        
Allocated Share-based Compensation Expense $ 491 $ 357 $ 1,239 $ 1,280
Cost of Revenue
       
Recognized Share Based Compensation Expense [Line Items]        
Allocated Share-based Compensation Expense 73 67 227 183
Sales and Marketing
       
Recognized Share Based Compensation Expense [Line Items]        
Allocated Share-based Compensation Expense 154 134 443 375
General and Administrative Expense
       
Recognized Share Based Compensation Expense [Line Items]        
Allocated Share-based Compensation Expense 225 103 459 586
Engineering and Development
       
Recognized Share Based Compensation Expense [Line Items]        
Allocated Share-based Compensation Expense $ 39 $ 53 $ 110 $ 136