INVESTMENTS (Details 1) (USD $)	3 Months Ended	12 Months Ended
Mar. 31, 2015	Dec. 31, 2014
Schedule of Available-for-sale Securities [Line Items]
Cost	$ 7,332,000	$ 7,330,000
Unrealized Gain	37,000	27,000
Unrealized Loss	(36,000)	(42,000)
Fair Value	7,333,000us-gaap_AvailableForSaleSecurities	7,315,000us-gaap_AvailableForSaleSecurities
Short-term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost	2,685,000	3,259,000
Unrealized Gain	24,000	26,000
Unrealized Loss	(35,000)	(36,000)
Fair Value	2,674,000	3,249,000
Long-term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost	4,647,000	4,071,000
Unrealized Gain	13,000	1,000
Unrealized Loss	(1,000)	(6,000)
Fair Value	4,659,000	4,066,000
U.S. Treasury Notes [Member] \| Short-term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost	904,000	680,000
Unrealized Gain	0	0
Unrealized Loss	0	0
Fair Value	904,000	680,000
U.S. Treasury Notes [Member] \| Long-term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost	2,265,000	2,165,000
Unrealized Gain	6,000	0
Unrealized Loss	0	(3,000)
Fair Value	2,271,000	2,162,000
Mutual funds [Member] \| Short-term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost	1,721,000	1,706,000
Unrealized Gain	0	0
Unrealized Loss	(35,000)	(36,000)
Fair Value	1,686,000	1,670,000
Corporate bonds and commercial paper [Member] \| Short-term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost	11,000	824,000
Unrealized Gain	0	1,000
Unrealized Loss	0	0
Fair Value	11,000	825,000
Corporate bonds and commercial paper [Member] \| Long-term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost	1,831,000	1,155,000
Unrealized Gain	6,000	1,000
Unrealized Loss	0	0
Fair Value	1,837,000	1,156,000
Government agency bonds [Member] \| Long-term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost	551,000	751,000
Unrealized Gain	1,000	0
Unrealized Loss	(1,000)	(3,000)
Fair Value	551,000	748,000
Common Stock [Member] \| Short-term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost	49,000	49,000
Unrealized Gain	24,000	25,000
Unrealized Loss	0	0
Fair Value	$ 73,000	$ 74,000

This item represents the cost of debt securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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