SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Senior Convertible Promissory Notes and other Long-Term Debt (Details)	1 Months Ended	3 Months Ended	12 Months Ended
	Dec. 31, 2014 USD ($) item $ / shares shares	Mar. 31, 2017 USD ($) shares	Dec. 31, 2015 USD ($) $ / shares shares
Convertible Debt
Convertible notes issued	$ 8,500,000
Percentage of proceeds from the sale of assets held for repay debt	50.00%
Convertible Senior Notes.
Convertible Debt
Debt instrument interest rate (as a percent)	10.00%
Percentage of convertible debt average VWAP	80.00%
Number of business days considered for calculating average VWAP | item	30
Number of shares issued upon conversion | shares		2,625,000	2,625,000
Convertible share price (in dollars per share) | $ / shares	$ 0.32
Percentage of proceeds from the sale of assets held for repay debt	50.00%
Amount held for repay debt	$ 250,000
Aggregate principal amount		$ 2,600,000	$ 2,600,000
Annual reduction in interest payments		200,000	$ 200,000
Non-convertible Promissory Note
Convertible Debt
Debt instrument interest rate (as a percent)			10.00%
Senior Promissory Notes issued		$ 1,300,000	$ 1,300,000
Maximum | Convertible Senior Notes.
Convertible Debt
Conversion ratio (in shares)	100
Number of shares issued upon conversion | shares	8,535,000
Convertible share price (in dollars per share) | $ / shares	$ 0.32		$ 0.5485
Minimum | Convertible Senior Notes.
Convertible Debt
Convertible share price (in dollars per share) | $ / shares			$ 0.3462