Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Net income	$ 507,000	$ 148,000
Other comprehensive loss:
Change in unrealized loss on marketable securities, net of tax	(96,000)	(328,000)
Comprehensive income (loss)	$ 411,000	$ (180,000)