STOCK BASED COMPENSATION (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Stock based compensation
Compensation expense related to stock options and restricted stock awards	$ 600,000	$ 500,000	$ 900,000	$ 800,000
Stock options
Assumptions used to value stock options
Dividend yield (as a percent)			0.00%	0.00%
Expected volatility (as a percent)			70.90%	73.50%
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)	1,966,203
Granted (in shares)	316,322
Exercised (in shares)	(105,732)
Forfeited or expired (in shares)	(36,500)
Outstanding at the end of the period (in shares)	2,140,293		2,140,293
Exercisable at the end of the period (in shares)	1,255,887		1,255,887
Weighted Average Exercise Price
Outstanding at the beginning of the period (in dollars per share)	$ 2.11
Granted (in dollars per share)	$ 3.02
Exercise price (in dollars per share)	$ 1.61
Forfeited or expired (in dollars per share)	$ 7.29
Outstanding at the end of the period (in dollars per share)	$ 2.22		$ 2.22
Exercisable at the end of the period (in dollars per share)	$ 1.75		$ 1.75
Weighted Average Remaining Term (in years)
Outstanding at the end of the period	2 years 7 months 17 days
Exercisable at the end of the period	1 year 3 months
Aggregate Intrinsic Value
Outstanding at the end of the period	1,272,000		1,272,000
Exercisable at the end of the period	1,271,000		1,271,000
Additional disclosures
Total intrinsic value of options exercised			461,000	107,000
Total unrecognized stock-based compensation expense	1,200,000		1,200,000
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)			(138,679)
Outstanding at the end of the period (in shares)	1,977,781		1,977,781
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)			$ 3.15
Outstanding at the end of the period (in dollars per share)	$ 2.01		$ 2.01
Vesting period			3 years
Total unrecognized stock-based compensation expense	$ 3,600,000		$ 3,600,000
Weighted average period over which unrecognized compensation cost is expected to be recognized			1 year 7 months 6 days