Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Details)

v3.8.0.1
Stock-Based Compensation (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Stock-Based Compensation    
Stock-based compensation $ 1,405 $ 1,448
Operating expense    
Stock-Based Compensation    
Stock-based compensation   1
Selling, general and administrative    
Stock-Based Compensation    
Stock-based compensation 1,388 1,220
Research and development    
Stock-Based Compensation    
Stock-based compensation $ 17 $ 227