INVESTMENTS (Details 1) (USD $)	6 Months Ended	12 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Cost	$ 11,195,000	$ 13,785,000
Unrealized Gain	9,000	97,000
Unrealized Loss	(34,000)	(24,000)
Fair Value	11,170,000	13,858,000
Short-Term Debt [Member]
Cost	3,233,000	4,791,000
Unrealized Gain	5,000	27,000
Unrealized Loss	(10,000)	(24,000)
Fair Value	3,228,000	4,794,000
Short-Term Debt [Member] | Us Treasury Securities [Member]
Cost	1,108,000	1,679,000
Unrealized Gain	3,000	5,000
Unrealized Loss	0	0
Fair Value	1,111,000	1,684,000
Short-Term Debt [Member] | Mutual Fund [Member]
Cost	1,377,000	649,000
Unrealized Gain	0	20,000
Unrealized Loss	(5,000)	0
Fair Value	1,372,000	669,000
Short-Term Debt [Member] | Corporate Debt Securities [Member]
Cost	521,000	1,608,000
Unrealized Gain	2,000	1,000
Unrealized Loss	(5,000)	(24,000)
Fair Value	518,000	1,585,000
Short-Term Debt [Member] | Us Government Agencies Debt Securities [Member]
Cost	227,000	855,000
Unrealized Gain	0	1,000
Unrealized Loss	0	0
Fair Value	227,000	856,000
Long-Term Debt [Member]
Cost	7,962,000	8,994,000
Unrealized Gain	4,000	70,000
Unrealized Loss	(24,000)	0
Fair Value	7,942,000	9,064,000
Long-Term Debt [Member] | Us Treasury Securities [Member]
Cost	3,442,000	4,004,000
Unrealized Gain	0	10,000
Unrealized Loss	(9,000)	0
Fair Value	3,433,000	4,014,000
Long-Term Debt [Member] | Corporate Debt Securities [Member]
Cost	2,757,000	3,654,000
Unrealized Gain	4,000	55,000
Unrealized Loss	(2,000)	0
Fair Value	2,759,000	3,709,000
Long-Term Debt [Member] | Us Government Agencies Debt Securities [Member]
Cost	1,763,000	1,336,000
Unrealized Gain	0	5,000
Unrealized Loss	(13,000)	0
Fair Value	$ 1,750,000	$ 1,341,000