Annual report pursuant to Section 13 and 15(d)

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

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STOCK-BASED COMPENSATION (Equity Based Compensation Schedule) (Details) - USD ($)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Allocation of stock-based compensation expense    
Stock compensation expense $ 5,806,000 $ 5,262,000
Research and development    
Allocation of stock-based compensation expense    
Stock compensation expense 2,823,000 2,556,000
Sales, marketing and administration    
Allocation of stock-based compensation expense    
Stock compensation expense $ 2,983,000 $ 2,706,000