Deferred Revenue (Schedule Of Deferred Revenue) (Details) - USD ($)	Sep. 30, 2015	Dec. 31, 2014
Deferred Revenue Arrangement [Line Items]
Deferred revenue	$ 7,259,894	$ 7,634,335
Less: Long-term deferred revenue	(812,070)	(976,165)
Total current deferred revenue	6,447,824	6,658,170
Product Shipped, Revenue Deferred [Member]
Deferred Revenue Arrangement [Line Items]
Deferred revenue	326,588	457,348
Customer Deposits [Member]
Deferred Revenue Arrangement [Line Items]
Deferred revenue		1,065,371
Deferred Service And License Fees [Member]
Deferred Revenue Arrangement [Line Items]
Deferred revenue	$ 6,933,306	$ 6,111,616