INVESTMENTS (Details 1) (USD $)	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Cost	$ 9,068,000	$ 13,785,000
Unrealized Gain	12,000	97,000
Unrealized Loss	(16,000)	(24,000)
Fair Value	9,064,000	13,858,000
Short-Term Debt [Member]
Cost	3,248,000	4,791,000
Unrealized Gain	4,000	27,000
Unrealized Loss	(6,000)	(24,000)
Fair Value	3,246,000	4,794,000
Short-Term Debt [Member] | Us Treasury Securities [Member]
Cost	861,000	1,679,000
Unrealized Gain	2,000	5,000
Unrealized Loss	0	0
Fair Value	863,000	1,684,000
Short-Term Debt [Member] | Mutual Fund [Member]
Cost	1,382,000	649,000
Unrealized Gain	0	20,000
Unrealized Loss	(5,000)	0
Fair Value	1,377,000	669,000
Short-Term Debt [Member] | Corporate Debt Securities [Member]
Cost	710,000	1,608,000
Unrealized Gain	2,000	1,000
Unrealized Loss	(1,000)	(24,000)
Fair Value	711,000	1,585,000
Short-Term Debt [Member] | Us Government Agencies Debt Securities [Member]
Cost	295,000	855,000
Unrealized Gain	0	1,000
Unrealized Loss	0	0
Fair Value	295,000	856,000
Long-Term Debt [Member]
Cost	5,820,000	8,994,000
Unrealized Gain	8,000	70,000
Unrealized Loss	(10,000)	0
Fair Value	5,818,000	9,064,000
Long-Term Debt [Member] | Us Treasury Securities [Member]
Cost	2,673,000	4,004,000
Unrealized Gain	0	10,000
Unrealized Loss	(2,000)	0
Fair Value	2,671,000	4,014,000
Long-Term Debt [Member] | Corporate Debt Securities [Member]
Cost	1,908,000	3,654,000
Unrealized Gain	8,000	55,000
Unrealized Loss	(2,000)	0
Fair Value	1,914,000	3,709,000
Long-Term Debt [Member] | Us Government Agencies Debt Securities [Member]
Cost	1,239,000	1,336,000
Unrealized Gain	0	5,000
Unrealized Loss	(6,000)	0
Fair Value	$ 1,233,000	$ 1,341,000