Quarterly report pursuant to Section 13 or 15(d)

STOCK-BASED COMPENSATION (Equity Based Compensation Schedule) (Details)

v3.19.2
STOCK-BASED COMPENSATION (Equity Based Compensation Schedule) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Allocation of stock-based compensation expense        
Stock compensation expense $ 1,457 $ 1,627 $ 2,811 $ 2,590
Research and development expenses        
Allocation of stock-based compensation expense        
Stock compensation expense 690 816 1,323 1,347
General and administrative expenses        
Allocation of stock-based compensation expense        
Stock compensation expense $ 767 $ 811 $ 1,488 $ 1,243