4. INVESTMENTS IN MARKETABLE SECURITIES (Detail) - (Table 1) Marketable Securities Gains (Losses) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Investments, Debt and Equity Securities [Abstract]
Net realized (loss) gain from sales of securities	$ (15,000)	$ (12,000)	$ (7,000)	$ 55,000
Unrealized net gain in trading securities	36,000	57,000	61,000	87,000
Total net gain from investments in marketable securities	$ 21,000	$ 45,000	$ 54,000	$ 142,000