Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Compensation expense (Details)

v3.20.1
Stock-Based Compensation - Compensation expense (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Stock Based Compensation    
Stock-based compensation $ 1,801 $ 2,616
Operating expense    
Stock Based Compensation    
Stock-based compensation 1 37
Selling, general and administrative    
Stock Based Compensation    
Stock-based compensation $ 1,800 $ 2,579