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4. INVESTMENTS IN MARKETABLE SECURITIES (Tables)
3 Months Ended
Mar. 31, 2013
Investments, Debt and Equity Securities [Abstract]  
Schedule of net realized and unrealized gain (loss) from investments in marketable securities
    Three Months Ended March 31,  
Description   2013     2013  
Net realized (loss) gain from sales of securities   $ (3,000 )   $ 49,000  
Unrealized net gain in trading securities     106,000       43,000  
Total net gain from investments in marketable securities   $ 103,000     $ 92,000