4. INVESTMENTS IN MARKETABLE SECURITIES (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Investments, Debt and Equity Securities [Abstract]
Trading securities net unrealized gain loss	$ (81,000)	$ (13,000)	$ 25,000	$ 29,000
Trading Securities, Net Realized Gain	11,000	18,000	8,000	68,000
Trading Securities, Realized Loss		21,000	23,000	36,000
Trading Securities, Realized Gain		$ 39,000	$ 31,000	$ 104,000