STOCKHOLDERS' DEFICIT - Series A, B, and C Convertible Preferred Stock (Details) $ / shares in Units, $ in Thousands	Jun. 14, 2016 shares	Jun. 10, 2016 shares	Mar. 09, 2015 committee executive $ / shares shares	Dec. 31, 2016 USD ($) shares	Dec. 31, 2015 USD ($) shares	Jul. 31, 2015 shares
Class of Stock [Line Items]
Convertible preferred stock series, shares authorized (in shares)			825,000
2015 Warrants | Common Stock
Class of Stock [Line Items]
Shares reserved (in shares)		3,600,000
Convertible Preferred Stock
Class of Stock [Line Items]
Convertible preferred stock series, shares issued (in shares)			625,000			10,822
Preferred stock offering price (in USD per share) | $ / shares			$ 100
Fair value assumptions, dividend yield (as a percent)			11.50%
Price of Warrants (in USD 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
Series A Preferred Stock
Class of Stock [Line Items]
Convertible preferred stock series, shares authorized (in shares)				825,000	825,000
Convertible preferred stock series, shares issued (in shares)				21,645	635,822
Shares converted (in shares)		614,177
Convertible preferred stock series, shares outstanding (in shares)				21,645	635,822
Convertible preferred stock series, liquidation preference | $				$ 2,603	$ 69,702
Liquidation preference (in USD per share) | $ / shares			$ 100.00
Series A Preferred Stock | 2015 Warrants
Class of Stock [Line Items]
Convertible preferred stock series, shares outstanding (in shares)				10,823
Series B Preferred Stock
Class of Stock [Line Items]
Shares converted (in shares)	614,177
Convertible preferred stock series, shares outstanding (in shares)				0
Series C Preferred Stock
Class of Stock [Line Items]
Convertible preferred stock series, shares authorized (in shares)				625,000
Convertible preferred stock series, shares issued (in shares)				614,177
Convertible preferred stock series, shares outstanding (in shares)				614,177
Convertible preferred stock series, liquidation preference | $				$ 75,491
Liquidation preference (in USD per share) | $ / shares			$ 115.48