Consolidated Statements of Comprehensive Income (Loss) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Net income	$ 1,041,000	$ 2,742,000
Other comprehensive income (loss):
Change in unrealized gain (loss) on marketable securities, net of tax	$ (1,523,000)	995,000
Reclassification adjustment for gains included in net income		(245,000)
Total other comprehensive income (loss)	$ (1,523,000)	750,000
Comprehensive income (loss)	$ (482,000)	$ 3,492,000