Annual report pursuant to Section 13 and 15(d)

Stock-based Compensation (Details 5)

v3.8.0.1
Stock-based Compensation (Details 5) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]      
Allocated Share-based Compensation Expense $ 2,414 $ 3,121 $ 1,731
Sales and marketing [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]      
Allocated Share-based Compensation Expense 485 677 579
Research and development [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]      
Allocated Share-based Compensation Expense 439 632 414
General and administrative [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]      
Allocated Share-based Compensation Expense 1,304 1,812 738
Restructuring Charges [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]      
Allocated Share-based Compensation Expense $ 186 $ 0 $ 0