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INVESTMENT IN MARKETABLE SECURITIES (Details 1) (USD $)
3 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Realized gain (loss) on marketable securities $ 209,000 $ (1,899,000)
Unrealized gain (loss) on marketable securities 1,316,000 (2,756,000)
Net gain (loss) on marketable securities $ 1,525,000 $ (4,655,000)