STOCKHOLDERS' (DEFICIT) EQUITY - Series A Convertible Preferred Stock (Details) $ / shares in Units, $ in Thousands		12 Months Ended
	Mar. 09, 2015 USD ($) $ / shares shares	Dec. 31, 2015 USD ($) committee executive shares	Jul. 27, 2015 shares	Dec. 31, 2014 USD ($) shares
Class of Stock [Line Items]
Series A preferred stock, shares authorized (in shares) | shares	825,000	825,000		0
Series A preferred stock, shares issued (in shares) | shares		635,822		0
Liquidation preference (in dollars per share) | $ / shares	$ 100.00
PIPE transaction issuance costs	$ 4,000
Series A preferred stock, liquidation preference		$ 69,702		$ 0
Series A convertible preferred stock, $.0001 par value; 825,000 shares authorized; 635,822 shares issued and outstanding; and, $69,702 liquidation preference as of December 31, 2015. No convertible preferred stock was authorized or outstanding as of December 31, 2014.		$ 62,918		0
2015 Warrants
Class of Stock [Line Items]
PIPE transaction issuance costs	$ 200
Convertible Preferred Stock
Class of Stock [Line Items]
Series A preferred stock, shares issued (in shares) | shares	625,000		10,822
Preferred stock offering price (in dollars per share) | $ / shares	$ 100.00
Price of Warrants (in dollars per share) | $ / shares	$ 5.17
Noncumulative cash dividend rate		8.50%
Additional liquidation preference multiple rate		11.50%
Number of committees board members appointed to		5.00%
Number of members holders may elect to board | executive		1
Voting threshold to elect board members | committee		2
PIPE transaction issuance costs	$ 3,800
Series A preferred stock, liquidation preference	62,500	$ 68,600
Series A convertible preferred stock, $.0001 par value; 825,000 shares authorized; 635,822 shares issued and outstanding; and, $69,702 liquidation preference as of December 31, 2015. No convertible preferred stock was authorized or outstanding as of December 31, 2014.	52,380	$ 62,918		$ 53,108
Warrant Value | Convertible Preferred Stock
Class of Stock [Line Items]
Preferred stock, discount on issuance	(3,145)
Beneficial Conversion Feature | Convertible Preferred Stock
Class of Stock [Line Items]
Preferred stock, discount on issuance	(3,145)
Issuance Costs | Convertible Preferred Stock
Class of Stock [Line Items]
Preferred stock, discount on issuance	$ (3,830)