Accrued Liabilities (Schedule Of Accrued Liabilities) (Details) - USD ($)	Jun. 30, 2017	Dec. 31, 2016	Dec. 31, 2015
Accrued Liabilities [Abstract]
Accrued salaries, bonus, and benefits	$ 2,197,612	$ 2,452,183
Accrued rent	640,496	965,412
Accrued licenses and maintenance fees	573,378	561,450
Accrued warranties	181,308	222,845	$ 316,835
Accrued taxes	267,164	219,017
Accrued professional services	112,500	180,450
Other	236,369	210,216
Total accrued liabilities	4,208,827	4,811,573
Less: Long term accrued liabilities	(321,316)	(320,409)
Total current accrued liabilities	$ 3,887,511	$ 4,491,164