Summary Of Significant Accounting Policies (Summary Of Contract Assets And Liabilities) (Details) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Contract Assets	$ 55,341	$ 2,917
Total deferred revenue	7,696,714	6,314,632
Less: Long-term deferred revenue	(560,649)	(611,863)
Total current deferred revenue	7,136,065	5,702,769
Product [Member]
Disaggregation of Revenue [Line Items]
Total deferred revenue	940,665	941,724
Service And License Fees [Member]
Disaggregation of Revenue [Line Items]
Total deferred revenue	$ 6,756,049	$ 5,372,908