4. INVESTMENTS IN MARKETABLE SECURITIES (Detail) - (Table 1) Marketable Securities Gains (Losses) (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]
Net realized gain from sales of securities	$ 11,000	$ 18,000	$ 8,000	$ 68,000
Unrealized net (loss) gain in trading securities	(81,000)	(13,000)	25,000	29,000
Total net (loss) gain from investments in marketable securities	$ (70,000)	$ 5,000	$ 33,000	$ 97,000