Deferred Revenue

6 Months Ended

Jun. 30, 2017

Deferred Revenue [Abstract]

Deferred Revenue

8. Deferred Revenue

Deferred revenue consists of the following:

	June 30,	December 31,
	2017	2016
Product shipped, revenue deferred	$        665,726	$        549,709
Customer deposits	1,455,000	2,910,000
Deferred service and license fees	6,358,017	5,813,956
Total deferred revenue	8,478,743	9,273,665
Less: Long-term deferred revenue	(377,076)	(522,329)
Total current deferred revenue	$     8,101,667	$     8,751,336