INVESTMENTS (Details Textual) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Unrealized gain (loss) on available-for-sale marketable securities	$ (61,000)	$ (8,000)	$ (98,000)	$ 55,000
Fair Value	11,170,000		11,170,000		13,858,000
Short-Term Debt [Member]
Fair Value	3,228,000		3,228,000		4,794,000
Mutual Fund [Member] | Short-Term Debt [Member]
Fair Value	$ 1,372,000		$ 1,372,000		$ 669,000