Revenue Recognition (Details 1)	6 Months Ended
	Jun. 30, 2019 USD ($)
Revenue Recognition [Abstract]
Deferred revenue, beginning	$ 302,000
Reclassification of beginning deferred revenue to revenue, as a result of performance obligations satisfied	(301,000)
Cash received in advance and not recognized as revenue	435,000
Deferred revenue, ending	$ 436,000