Accrued Liabilities (Schedule Of Accrued Liabilities) (Details)	3 Months Ended	9 Months Ended
	Sep. 30, 2013 USD ($) ft²	Sep. 30, 2015 USD ($) ft²	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Accrued Liabilities [Abstract]
Accrued salaries, bonus, and benefits		$ 2,693,800	$ 2,557,557
Accrued rent		1,387,005	1,407,740
Accrued licenses and maintenance fees		662,323	661,766
Accrued interest		490,792	493,616
Accrued warranties		304,606	364,548	$ 501,212
Accrued taxes		311,529	332,364
Other		198,051	102,479
Total accrued liabilities		6,048,106	5,920,070
Less: Long term accrued liabilities		(5,589)	(414,928)
Total current accrued liabilities		$ 6,042,517	$ 5,505,142
Square feet of office leased space | ft²		52,000
Square feet of demonstration and assembly leased space | ft²		12,000
Square feet of terminated unimproved leased space | ft²	13,000
Accrued lease termination costs	$ 515,138
Accrued lease termination costs remaining		$ 302,264