Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Details)

v3.19.1
Stock-Based Compensation (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Stock Based Compensation    
Stock-based compensation $ 2,616 $ 1,405
Operating expense    
Stock Based Compensation    
Stock-based compensation 37 17
Selling, general and administrative    
Stock Based Compensation    
Stock-based compensation $ 2,579 $ 1,388