DERIVATIVE INSTRUMENTS (Details) (USD $)	3 Months Ended
	Mar. 31, 2014 item	Mar. 31, 2013
DERIVATIVE INSTRUMENTS
Increase (decrease) in the fair value of the warrants	$ 0	$ 10,449,000
Fair value of derivative warrant liability reclassified to additional paid-in capital		476,000
Redemption of outstanding investor warrants to common stock	11,726,343
Cash proceeds from warrants exercised	$ 15,984,304
Number of derivative instruments	0