SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - DILUTIVE COMMON SHARES (Details) - shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Net loss per share
Potentially dilutive common shares that have not been included in the net loss per common share calculations because the effect would have been anti-dilutive	8,129,739	7,022,350	5,776,544
Stock options
Net loss per share
Potentially dilutive common shares that have not been included in the net loss per common share calculations because the effect would have been anti-dilutive	8,110,239	7,015,350	5,770,544
Restricted stock
Net loss per share
Potentially dilutive common shares that have not been included in the net loss per common share calculations because the effect would have been anti-dilutive	19,500	7,000	6,000