STOCK PURCHASE WARRANTS (Details)		9 Months Ended	12 Months Ended
	Sep. 09, 2016 holder $ / shares shares	Sep. 30, 2016 $ / shares shares	Dec. 31, 2014	Dec. 31, 2015 $ / shares
August 2013 warrants
Stock Purchase Warrants
Exercise price per share (in dollars per share)		$ 4.80
Total shares issuable on exercise | shares		724,950
Assumptions used in calculating the estimated fair value of the warrants
Closing stock price (in dollars per share)		$ 2.80		$ 2.58
Expected dividend rate (as a percent)		0.00%	0.00%
Expected stock price volatility (as a percent)		90.00%	91.40%
Risk-free interest rate (as a percent)		0.80%	1.30%
Expected life (in years)		1 year 10 months 17 days	2 years 7 months 17 days
Warrants Issued In September 2016
Stock Purchase Warrants
Warrants issued (in shares) | shares	117,074
Number of warrant holders | holder	2
Exercise price per share (in dollars per share)		$ 2.48
Total shares issuable on exercise | shares		117,074
Assumptions used in calculating the estimated fair value of the warrants
Closing stock price (in dollars per share)	$ 2.20
Expected dividend rate (as a percent)		0.00%
Expected stock price volatility (as a percent)		89.80%
Risk-free interest rate (as a percent)		1.40%
Expected life (in years)		6 years