STOCKHOLDERS' EQUITY - Intrinsic Value of Options (Details 5) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Employee stock options
Stock Based compensation
Total intrinsic value of options exercised	$ 0.0	$ 1.8
Intrinsic value of options outstanding	0.0
Total unrecognized stock-based compensation expense	$ 2.2
Weighted average period over which unrecognized compensation cost is expected to be recognized	1 year 8 months 12 days
Cash received from exercise of options	$ 0.0	$ 1.5
Restricted Stock
Stock Based compensation
Total unrecognized stock-based compensation expense	$ 0.6
Weighted average period over which unrecognized compensation cost is expected to be recognized	1 year 4 months 24 days
Shares
Outstanding at the beginning of the period (in shares)	689,370	1,898,133
Granted (in shares)	1,669,655	525,296
Vested (in shares)	(697,630)	(908,750)
Forfeited (in shares)	(383,927)	(825,309)
Outstanding at the end of the period (in shares)	1,277,468	689,370
Weighted Average Fair Value
Outstanding at the beginning of the period (in dollars per share)	$ 2.87	$ 1.97
Granted (in dollars per share)	0.56	3.00
Vested (in dollars per share)	1.79	2.39
Forfeited (in dollars per share)	2.06	1.41
Outstanding at the end of the period (in dollars per share)	$ 0.69	$ 2.87
Vesting period (excluding shares granted in March 2010)	3 years