Deferred Revenue (Schedule Of Deferred Revenue) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Deferred Revenue Arrangement [Line Items]
Deferred revenue	$ 8,010,834	$ 9,980,098
Less: Long-term deferred revenue	(491,080)	(477,159)
Total current deferred revenue	7,519,754	9,502,939
Product Shipped, Revenue Deferred [Member]
Deferred Revenue Arrangement [Line Items]
Deferred revenue	1,368,007	3,206,641
Customer Deposits [Member]
Deferred Revenue Arrangement [Line Items]
Deferred revenue	421,544	558,227
Deferred Service And License Fees [Member]
Deferred Revenue Arrangement [Line Items]
Deferred revenue	$ 6,221,283	$ 6,215,230