Quarterly report pursuant to Section 13 or 15(d)

Stock-based Compensation - Compensation Expense (Details)

v3.19.1
Stock-based Compensation - Compensation Expense (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]    
Compensation expense $ 636 $ 892
Sales and marketing    
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]    
Compensation expense 223 109
Research and development    
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]    
Compensation expense 45 179
General and administrative    
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]    
Compensation expense $ 368 $ 604