Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Net income	$ 306,000	$ 966,000	$ 741,000	$ 2,130,000
Other comprehensive income (loss):
Change in unrealized gain (loss) on marketable securities, net of tax	$ (452,000)	$ (278,000)	$ (1,321,000)	728,000
Reclassification adjustment for gains included in net income, net of tax				(245,000)
Total other comprehensive income (loss)	$ (452,000)	$ (278,000)	$ (1,321,000)	483,000
Comprehensive income (loss)	$ (146,000)	$ 688,000	$ (580,000)	$ 2,613,000