Deferred Revenue and Income (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Aug. 31, 2012
Deferred Revenue Disclosure [Abstract]
Fisher agreement	$ 13	$ 13
Research Use Only Accelerate ID/AST systems	114	0
Research Use Only Accelerate ID/AST systems	127	13
Arizona Commerce Authority grant	1,000	1,000	$ 1,000
Fisher agreement	0	14
Total long-term deferred income	$ 1,000	$ 1,014