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INVESTMENTS (Details 2) (USD $)
12 Months Ended 3 Months Ended 6 Months Ended
Dec. 31, 2013
Jun. 30, 2014
Auction rate securities
Jun. 30, 2013
Auction rate securities
Jun. 30, 2014
Auction rate securities
Jun. 30, 2013
Auction rate securities
INVESTMENTS          
Realized gains on the sale of available-for-sale investments $ 2,500,000        
Investments          
Gain on trading securities sold   138,000   269,000  
(Loss) gain on trading securities held   (121,000) 392,000 (185,000) 399,000
Gain on trading securities   $ 17,000 $ 392,000 $ 84,000 $ 399,000