STOCKHOLDERS' EQUITY (Details) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
STOCKHOLDERS' EQUITY
Cumulative dividend on preferred stock (as a percent)	8.00%	8.00%
Number of common shares into which one share of preferred stock is to be converted	0.50
Redemption price (in dollars per share)	$ 12.00
Shares to be issued as percentage of redemption price and any accrued and unpaid dividends	125.00%
Number of trading days considered for calculating the weighted average closing bid price at which preferred stock will be redeemed	30 days
Maximum number of shares of common stock that the company, at its option, can issue for each one share of preferred stock redeemed	1.5
Percentage of conversion price that the entity's common stock must exceed to give the entity the right to redeem	133.00%
Minimum number of days within 30-day trading period in which the closing price of the entity's common stock must exceed the conversion price	10 days
Number of trading days during which the closing bid price of the entity's common stock must exceed the conversion price	30 days