Deferred Revenue and Income (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Aug. 31, 2012
Deferred Revenue Disclosure [Abstract]
Fisher agreement	$ 13	$ 13
Products not yet delivered	45	114
Products not yet delivered	58	127
Arizona Commerce Authority grant	1,000	1,000	$ 1,000
Total long-term deferred income	$ 1,000	$ 1,000

The carrying amount of consideration received or receivable as of the balance sheet date on potential earnings that were not recognized as revenue in conformity with GAAP, and which are expected to be recognized as such within one year or the normal operating cycle, if longer, including sales, license fees, and royalties, but excluding interest income.

The noncurrent portion of deferred revenue amount as of balance sheet date. Deferred revenue is a liability related to a revenue producing activity for which revenue has not yet been recognized, and is not expected to be recognized in the next twelve months. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP.

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