Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Stock-Based Compensation Expense) (Details)

v3.21.2
Stockholders' Equity (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 Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation expense $ 4,326 $ 3,171 $ 12,449 $ 10,319
Avenue [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation expense 69 161 299 592
Checkpoint [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation expense 779 725 2,319 2,095
Mustang [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation expense 884 606 2,427 2,368
Other Partners [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation expense 32 47 98 163
Employee Awards [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation expense 2,185 1,231 6,236 3,868
Executive Awards [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation expense 377 369 1,070 1,136
Warrants [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation expense $ 0 $ 32 $ 0 $ 97