STOCKHOLDERS' EQUITY (Details 2) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Preferred stock
Cumulative dividend (as a percent)	8.00%	8.00%
Number of outstanding redeemable preferred shares	10,703	10,703
Aggregate redemption price	$ 100,000
Number of shares of preferred stock redeemed			87,409
Cost of redemption of preferred stock			1,300,000
8% convertible preferred stock
Preferred stock
Cumulative dividend (as a percent)	8.00%
Accrued preferred dividends	$ 82,000	72,000
Accrued preferred dividends (in dollars per share)	$ 7.68	6.72
Redemption price (in dollars per share)	$ 12
8% convertible preferred stock | Prior to June 30, 2005
Preferred stock
Preferred to common (in shares)	1
8% convertible preferred stock | July 1, 2005 through June 30, 2006
Preferred stock
Preferred to common (in shares)	0.75
8% convertible preferred stock | July 1, 2006 through redemption
Preferred stock
Preferred to common (in shares)	0.50