Organization and Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Schedule of Organization and Summary of Significant Accounting Policies [Line Items]
Total warrant liability at December 31, 2015	$ 1,444
Adjustment to record warrants at fair value	(4)	$ 3,279
Total warrant liability at March 31, 2016	$ 1,440