SHORT-TERM INVESTMENTS (Details) (USD $)	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2012	Jun. 30, 2012	Dec. 31, 2011
Available for sale equity securities
Cost	$ 3,259,000	$ 3,259,000	$ 5,294,000
Securities sold	(1,400,000)	(2,567,000)
Net unrealized gains (losses) recognized in earnings	(48,000)	(48,000)	(2,035,000)
Carrying value	644,000	644,000	3,259,000
Imapairments and realized losses on investments recoreded in earnings
Impairments and realized losses on investments	(68,000)	(349,000)
Net proceeds from disposal	1,150,000	2,272,000
Unrealized (loss) gain on available-for-sale securities reported in prior periods that was realized in current period	100,000
Realized gains (losses) recognized from securities sold	$ 200,000	$ 300,000