3. Net realized and unrealized gain (loss) from investments in marketable securities is summarized below (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Net realized and unrealized gain (loss) from investments in marketable securities is summarized below
Net realized gain from sales of securities	$ 34,000	$ 11,000	$ 46,000	$ 8,000
Unrealized net gain (loss) in trading securities	477,000	(81,000)	592,000	25,000
Total net gain (loss) from investments in marketable securities	511,000	70,000	638,000	33,000
Gross gains on realized investments	46,000	11,000	80,000	31,000
Gross realized loss in marketable securities	$ 12,000		$ 34,000	$ 23,000