Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Net income	$ 288,000	$ 895,000	$ 436,000	$ 1,164,000
Other comprehensive income (loss):
Change in unrealized gain (loss) on marketable securities, net of tax	$ (541,000)	563,000	$ (869,000)	1,005,000
Reclassification adjustment for gains included in net income, net of tax		(141,000)		(245,000)
Total other comprehensive income (loss)	$ (541,000)	422,000	$ (869,000)	760,000
Comprehensive income (loss)	$ (253,000)	$ 1,317,000	$ (433,000)	$ 1,924,000