STOCK-BASED COMPENSATION (Details) (USD $) In Thousands, except Share data, unless otherwise specified	9 Months Ended		3 Months Ended	9 Months Ended		3 Months Ended	9 Months Ended	12 Months Ended	9 Months Ended		3 Months Ended	9 Months Ended
	Sep. 30, 2013	May 14, 2013	Sep. 30, 2013 ESPP	Sep. 30, 2013 ESPP item	Nov. 09, 2010 ESPP	Sep. 30, 2013 Stock options item	Sep. 30, 2013 Stock options	Dec. 31, 2012 Stock options	Sep. 30, 2013 Stock options Minimum	Sep. 30, 2013 Stock options Maximum	Sep. 30, 2013 Stock options Vests 25%, 25% 50% over three years item	Sep. 30, 2013 Restricted shares
Stock-based compensation
Number of shares reserved for issuance		6,200,000			500,000
Vesting period									3 years	4 years
Expiration period							10 years
Number of shares available for grant or purchase	1,894,749		482,021	482,021
Number of options issued to purchase shares						50,000	50,000
Exercise price of options issued (in dollars per share)						$ 2.27	$ 2.27
Number of employees to whom options were issued						1
Percentage of the award vesting on each of the first two anniversaries											25.00%
Percentage of the award vesting at third anniversary											50.00%
Number of anniversaries, initial vesting percentage											2
Assumptions used to estimate the fair values of the stock options granted
Risk-free interest rate (as a percent)						2.50%
Expected volatility (as a percent)						58.90%
Expected life						7 years 4 months 28 days
Weighted-average estimated fair value of options granted during the period (in dollars per share)						$ 1.40	$ 1.40
Term of U.S. Treasury zero-coupon strip	10 years
Expected amount of dividend to be distributed						$ 0
Number of Shares
Outstanding at the beginning of the period (in shares)							3,929,910
Options granted (in shares)						50,000	50,000
Cancelled/forfeited (in shares)							(208,605)
Outstanding at the end of the period (in shares)						3,771,305	3,771,305	3,929,910
Vested and exercisable at the end of the period (in shares)						2,665,008	2,665,008
Vested and exercisable at the end of the period and expected to vest thereafter (in shares)						3,771,305	3,771,305
Weighted-Average Exercise Price
Outstanding at the beginning of the period (in dollars per share)							$ 9.03
Options granted (in dollars per share)						$ 2.27	$ 2.27
Canceled/forfeited (in dollars per share)							$ 5.43
Outstanding at the end of the period (in dollars per share)						$ 9.13	$ 9.13	$ 9.03
Vested and exercisable at the end of the period (in dollars per share)						$ 11.42	$ 11.42
Vested and exercisable at the end of the period and expected to vest thereafter (in dollars per share)						$ 9.13	$ 9.13
Weighted-Average Remaining Contractual Term (in years)
Outstanding at the end of the period							6 years 11 months 16 days	7 years 9 months
Options granted							7 years 4 months 28 days
Vested and exercisable at the end of the period							6 years 1 month 17 days
Vested and exercisable at the end of the period and expected to vest thereafter							6 years 11 months 16 days
Weighted-Average Grant-Date Fair Value
Outstanding (in dollars per share)						$ 3.87	$ 3.87	$ 3.84
Options granted (in dollars per share)						$ 1.40	$ 1.40
Canceled/forfeited (in dollars per share)							$ 2.85
Vested and exercisable at the end of the period (in dollars per share)						$ 4.62	$ 4.62
Vested and exercisable at the end of the period and expected to vest thereafter (in dollars per share)						$ 3.87	$ 3.87
Aggregate Intrinsic Value
Outstanding at the beginning of the period							(26,723)
Options granted							(2)
Outstanding at the end of the period						(26,022)	(26,022)	(26,723)
Vested and exercisable at the end of the period						(24,491)	(24,491)
Vested and exercisable at the end of the period and expected to vest thereafter						(26,022)	(26,022)
Stock-based compensation, additional disclosure
Closing stock price (in dollars per share)	$ 2.23
Number of units
Unvested at the beginning of the period (in shares)												128,060
Granted (in shares)												169,237
Vested (in shares)												(154,672)
Unvested at the end of the period (in shares)												142,625
Expected to vest at the end of the period (in shares)												142,625
Weighted-Average Grant-Date Fair Value
Unvested at the beginning of the period (in dollars per share)												$ 7.46
Granted (in dollars per share)												$ 2.64
Vested (in dollars per share)												$ 4.01
Unvested at the end of the period (in dollars per share)												$ 5.49
Expected to vest at the end of the period (in dollars per share)												$ 5.49
Unrecognized compensation cost
Unrecognized compensation cost						1,612	1,612					612
Weighted-average remaining vesting period of recognition							1 year					1 year 6 months
2010 ESPP
Discount rate (as a percent)				10.00%
Number of Offering periods				4
Stock-based compensation expense			$ 0	$ 1