INVESTMENTS (Details 1) (USD $)	Sep. 30, 2012	Dec. 31, 2011
Cost	$ 13,871,000	$ 16,706,000
Unrealized Gain	104,000	72,000
Unrealized Loss	(16,000)	(95,000)
Fair Value	13,959,000	16,683,000
Short-Term Debt [Member]
Cost	6,099,000	6,962,000
Unrealized Gain	32,000	13,000
Unrealized Loss	(16,000)	(71,000)
Fair Value	6,115,000	6,904,000
Short-Term Debt [Member] | Us Treasury Securities [Member]
Cost	2,603,000	1,347,000
Unrealized Gain	9,000	2,000
Unrealized Loss	0	0
Fair Value	2,612,000	1,349,000
Short-Term Debt [Member] | Mutual Fund [Member]
Cost	646,000	4,614,000
Unrealized Gain	19,000	0
Unrealized Loss	0	(69,000)
Fair Value	665,000	4,545,000
Short-Term Debt [Member] | Corporate Debt Securities [Member]
Cost	1,989,000	669,000
Unrealized Gain	2,000	10,000
Unrealized Loss	(16,000)	(2,000)
Fair Value	1,975,000	677,000
Short-Term Debt [Member] | Us Government Agencies Debt Securities [Member]
Cost	861,000	332,000
Unrealized Gain	2,000	1,000
Unrealized Loss	0	0
Fair Value	863,000	333,000
Long-Term Debt [Member]
Cost	7,772,000	9,744,000
Unrealized Gain	72,000	59,000
Unrealized Loss	0	(24,000)
Fair Value	7,844,000	9,779,000
Long-Term Debt [Member] | Us Treasury Securities [Member]
Cost	3,605,000	5,365,000
Unrealized Gain	11,000	29,000
Unrealized Loss	0	0
Fair Value	3,616,000	5,394,000
Long-Term Debt [Member] | Corporate Debt Securities [Member]
Cost	3,357,000	3,529,000
Unrealized Gain	56,000	25,000
Unrealized Loss	0	(24,000)
Fair Value	3,413,000	3,530,000
Long-Term Debt [Member] | Us Government Agencies Debt Securities [Member]
Cost	810,000	850,000
Unrealized Gain	5,000	5,000
Unrealized Loss	0	0
Fair Value	$ 815,000	$ 855,000