Intangible Assets (Schedule of Other Intangible Assets) (Details) (USD $)	3 Months Ended
	Mar. 31, 2015		Dec. 31, 2014
Other Intangible Assets
Gross Carrying Amount	$ 6,706,133		$ 6,706,133
Accumulated Amortization	3,039,009		2,797,734
Net Carrying Amount	3,667,124		3,908,399
Acquired intangibles - customer lists and non-compete agreements [Member]
Other Intangible Assets
Gross Carrying Amount	1,997,300		1,997,300
Accumulated Amortization	1,570,682		1,532,123
Net Carrying Amount	426,618		465,177
Acquired intangibles - customer lists and non-compete agreements [Member] | Minimum [Member]
Other Intangible Assets
Useful Life	5 years
Acquired intangibles - customer lists and non-compete agreements [Member] | Maximum [Member]
Other Intangible Assets
Useful Life	10 years
Acquired intangibles-patents and patent rights [Member]
Other Intangible Assets
Gross Carrying Amount	3,650,000	[1]	3,650,000	[1]
Accumulated Amortization	1,029,889	[1]	852,343	[1]
Net Carrying Amount	2,620,111	[1]	2,797,657	[1]
Useful Life	5 years 2 months 12 days
Patent application costs [Member]
Other Intangible Assets
Gross Carrying Amount	1,058,833	[2]	1,058,833	[2]
Accumulated Amortization	438,438	[2]	413,268	[2]
Net Carrying Amount	$ 620,395	[2]	$ 645,565	[2]
Useful Life	9 years 9 months 18 days

[1] (1) Acquired patents and patent rights are amortized over their expected useful life which is generally the remaining legal life of the patent. As of March 31, 2015, the weighted average remaining useful life of these assets in service was approximately 5.2 years.

[2] (2) Patent application costs are amortized over their expected useful life which is generally the remaining legal life of the patent. As of March 31, 2015, the weighted average remaining useful life of these assets in service was approximately 9.8 years.