Quarterly report pursuant to Section 13 or 15(d)

Stock-based Compensation - Stock-based Compensation Expense (Details)

v3.21.2
Stock-based Compensation - Stock-based Compensation Expense (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Share-based compensation expense        
Stock-based compensation expense $ 779 $ 708 $ 4,445 $ 3,269
General and Administrative [Member]        
Share-based compensation expense        
Stock-based compensation expense $ 779 $ 708 $ 4,445 $ 3,269