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Revenue Recognition (Details 1)	6 Months Ended
	Jun. 30, 2018 USD ($)
Revenue Recognition Details 1
Deferred revenue, beginning	$ 372,000
Reclassification of beginning deferred revenue to revenue, as a result of performance obligations satisfied.	(122,000)
Cash received in advance and not recognized as revenue	781,000
Cumulative catch-up from a change in the timeframe for recognition of revenue arising from deferred revenue	0
Deferred revenue, ending	$ 1,031,000

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- References

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- Definition

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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section 45
-Paragraph 8
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=82887183&loc=d3e6935-107765

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