INVESTMENTS (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2012	Dec. 31, 2013
Schedule of Trading Securities and Other Trading Assets [Line Items]
Realized gain on investment	$ 400,000
Other than Temporary Impairment Losses, Investments		1,200,000
Adjusted Cost	983,000		3,670,000
Minimum maturity period of short-term investments as company has the ability and intent to redeem them within the year (in days)	90 days
Auction Rate Securities [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Adjusted Cost	$ 983,000		$ 983,000
Auction rate-security, Term	10 years