INVESTMENTS AND FAIR VALUE MEASUREMENTS (Details 1) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Schedule of Available-for-sale Securities [Line Items]
Cost	$ 7,199,000	$ 13,785,000
Unrealized Gain	8,000	97,000
Unrealized Loss	(17,000)	(24,000)
Fair Value	7,190,000	13,858,000
Short-Term Debt [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost	4,092,000	4,791,000
Unrealized Gain	3,000	27,000
Unrealized Loss	(5,000)	(24,000)
Fair Value	4,090,000	4,794,000
Short-Term Debt [Member] | U.S. Treasury Notes [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost	1,697,000	1,679,000
Unrealized Gain	2,000	5,000
Unrealized Loss	0	0
Fair Value	1,699,000	1,684,000
Short-Term Debt [Member] | Mutual Fund [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost	1,386,000	649,000
Unrealized Gain	0	20,000
Unrealized Loss	(4,000)	0
Fair Value	1,382,000	669,000
Short-Term Debt [Member] | Corporate bonds and commercial paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost	590,000	1,608,000
Unrealized Gain	1,000	1,000
Unrealized Loss	(1,000)	(24,000)
Fair Value	590,000	1,585,000
Short-Term Debt [Member] | Government agency bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost	419,000	855,000
Unrealized Gain	0	1,000
Unrealized Loss	0	0
Fair Value	419,000	856,000
Long-Term Debt [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost	3,107,000	8,994,000
Unrealized Gain	5,000	70,000
Unrealized Loss	(12,000)	0
Fair Value	3,100,000	9,064,000
Long-Term Debt [Member] | U.S. Treasury Notes [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost	930,000	4,004,000
Unrealized Gain	0	10,000
Unrealized Loss	(4,000)	0
Fair Value	926,000	4,014,000
Long-Term Debt [Member] | Corporate bonds and commercial paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost	1,565,000	3,654,000
Unrealized Gain	5,000	55,000
Unrealized Loss	(1,000)	0
Fair Value	1,569,000	3,709,000
Long-Term Debt [Member] | Government agency bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost	612,000	1,336,000
Unrealized Gain	0	5,000
Unrealized Loss	(7,000)	0
Fair Value	$ 605,000	$ 1,341,000