SUBSEQUENT EVENTS (Details) (USD $)	12 Months Ended			1 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Jan. 24, 2012 Issuance of Equity [Member]
Subsequent Event [Line Items]
Subsequent event, date				Jan. 24, 2012
Shares of common stock sold (in shares)				10,952,381
Public offering price (in dollars per share)				$ 10.50
Gross proceeds from common stock offering	$ 20,000	$ 420,000	$ 6,320,000	$ 109,300,000
Estimated offering expenses				$ 575,000