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, 2015
Dec. 31, 2014
Allocation of stock-based compensation expense    
Stock compensation expense $ 1,360,000 $ 1,030,000
Research and development expenses | Employees    
Allocation of stock-based compensation expense    
Stock compensation expense 609,000 320,000
Research and development expenses | Non-employees    
Allocation of stock-based compensation expense    
Stock compensation expense 33,000 72,000
General and administrative expenses | Non-employees    
Allocation of stock-based compensation expense    
Stock compensation expense 54,000 224,000
General and administrative expenses | Employees and directors    
Allocation of stock-based compensation expense    
Stock compensation expense $ 664,000 $ 414,000