CAPITAL STRUCTURE, COMMON STOCK WARRANTS (Details) (USD $)	3 Months Ended			6 Months Ended									6 Months Ended		12 Months Ended	6 Months Ended		12 Months Ended
	Jun. 30, 2013		May 31, 2012	Jun. 30, 2013		May 31, 2012	Jun. 30, 2013 Issued in Connection with Encode Merger [Member]	Jun. 30, 2013 Issued to Placement Agents in August 2009 [Member]	Jun. 30, 2013 2009 Merger [Member]	Jun. 30, 2013 Issued to Registered Direct Investors in Dec. 2009 [Member]	Jun. 30, 2013 Issued to Private Placement Investors in Aug. 2010 [Member]	Jun. 30, 2013 Issued to Placement Agent in Aug. 2010 [Member]	Jun. 30, 2013 December 2009 Equity Financing, Series A [Member]	May 31, 2012 December 2009 Equity Financing, Series A [Member]	Dec. 31, 2012 December 2009 Equity Financing, Series A [Member]	Jun. 30, 2013 August 2010 Private Placement, Investors and Placement Agent [Member]	May 31, 2012 August 2010 Private Placement, Investors and Placement Agent [Member]	Dec. 31, 2012 August 2010 Private Placement, Investors and Placement Agent [Member]
Class of Warrant or Right [Line Items]
Proceeds from the exercise of common stock warrants	$ 4,900,000			$ 6,706,000		$ 3,057,000
Exercise of common stock warrants (in shares)	1,733,280
Common stock warrants outstanding [Abstract]
Number of shares exercisable (in shares)	2,213,000			2,213,000			233,000	65,000	4,000	363,000	1,450,000	98,000
Exercise price (in dollars per share)	$ 3.15	[1]		$ 3.15	[1]		$ 2.87	$ 1.50	$ 157.08	$ 2.45	$ 3.075	$ 3.075
Expiration date							2015-12-13	2014-07-31	2015-09-26	2014-12-22	2015-08-12	2015-08-12
Assumptions to obtain the fair value of the warrants [Abstract]
Fair value													2,600,000		2,600,000	10,900,000		13,800,000
Black-Scholes inputs:
Stock price (in dollars per share)													$ 9.35		$ 5.85	$ 9.35		$ 5.85
Exercise price (in dollars per share)													$ 2.45		$ 2.45	$ 3.075		$ 3.075
Risk free interest rate (in hundredths)													0.27%		0.25%	0.36%		0.31%
Volatility (in hundredths)													95.00%		100.00%	95.00%		112.00%
Expected term													1 year 6 months		2 years	2 years		2 years 6 months
Dividend (in hundredths)													0.00%		0.00%	0.00%		0.00%
Adjustment to fair value of common stock warrants	(7,041,000)		6,937,000	(5,981,000)		(877,000)							(1,700,000)	(1,000,000)		(4,300,000)	100,000
Activity of the warrant liabilities [Roll Forward]
Fair value of warrants, beginning of period													2,600,000	6,700,000		13,800,000	18,700,000
Warrants exercised				6,706,000									(1,700,000)	(4,500,000)		(7,200,000)	(2,700,000)
Adjustment to mark to market common stock warrants	7,041,000		(6,937,000)	5,981,000		877,000							1,700,000	1,000,000		4,300,000	(100,000)
Fair value of warrants, end of period	13,500,000		19,100,000	13,500,000		19,100,000							2,600,000	3,200,000	2,600,000	10,900,000	15,900,000	13,800,000
Net loss	24,121,000		2,997,000	40,048,000		16,989,000
Effect of 10% decrease of closing stock price on increase (decrease) on net loss				(1,700,000)
Effect of 10% increase of closing stock price on increase (decrease) on net loss				1,700,000
Effect of 10% decrease of the volatility assumption on increase (decrease) on net loss				(300,000)
Effect of 10% increase of the volatility assumption on increase (decrease) on net loss				$ 300,000

[1] Weighted-average exercise price