STOCK BASED COMPENSATION (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Stock based compensation
Compensation expense related to stock options and restricted stock awards	$ 500,000	$ 800,000	$ 1,500,000	$ 1,700,000
Stock options
Assumptions used to value stock options
Dividend yield (as a percent)			0.00%	0.00%
Expected volatility (as a percent)			70.90%	73.40%
Risk-free interest rate (as a percent)			0.50%	0.50%
Expected life			3 years 6 months	3 years 6 months
Number of Options
Outstanding at the beginning of the period (in shares)	2,140,293
Granted (in shares)	0
Exercised (in shares)	(462,166)
Forfeited or expired (in shares)	(43,750)
Outstanding at the end of the period (in shares)	1,634,377		1,634,377
Exercisable at the end of the period (in shares)	780,888		780,888
Weighted Average Exercise Price
Outstanding at the beginning of the period (in dollars per share)	$ 2.22
Granted (in dollars per share)	$ 0.00
Exercise price (in dollars per share)	$ 0.51
Forfeited or expired (in dollars per share)	$ 6.54
Outstanding at the end of the period (in dollars per share)	$ 2.59		$ 2.59
Exercisable at the end of the period (in dollars per share)	$ 2.26		$ 2.26
Weighted Average Remaining Term (in years)
Outstanding at the end of the period	2 years 11 months 8 days
Exercisable at the end of the period	1 year 4 months 20 days
Aggregate Intrinsic Value
Outstanding at the end of the period	654,000		654,000
Exercisable at the end of the period	572,000		572,000
Additional disclosures
Total intrinsic value of options exercised			1,566,000	358,000
Total unrecognized stock-based compensation expense	1,100,000		1,100,000
Weighted Average Fair Value
Weighted average period over which unrecognized compensation cost is expected to be recognized			2 years 1 month 6 days
Restricted Shares
Shares
Outstanding at the beginning of the period (in shares)			1,606,460
Granted (in shares)			886,331
Vested (in shares)			(376,331)
Forfeited (in shares)			(170,208)
Outstanding at the end of the period (in shares)	1,946,252		1,946,252
Weighted Average Fair Value
Outstanding at the beginning of the period (in dollars per share)			$ 2.54
Granted (in dollars per share)			$ 1.87
Vested (in dollars per share)			$ 3.52
Forfeited (in dollars per share)			$ 3.10
Outstanding at the end of the period (in dollars per share)	$ 2.00		$ 2.00
Vesting period			3 years
Total unrecognized stock-based compensation expense	$ 3,100,000		$ 3,100,000
Weighted average period over which unrecognized compensation cost is expected to be recognized			1 year 7 months 6 days