Other Intangible Assets (Detail) (USD $)	6 Months Ended		12 Months Ended
	Jun. 30, 2012		Dec. 31, 2011
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	3,355,220		3,248,445
Accumulated Amortization	1,357,285		1,205,233
Net Carrying Amount	1,997,935		2,043,212
Acquired intangibles
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,405,300		2,405,300
Accumulated Amortization	1,121,813		999,761
Net Carrying Amount	1,283,487		1,405,539
Acquired intangibles | Minimum
Finite-Lived Intangible Assets [Line Items]
Useful Life	5 years		5 years
Acquired intangibles | Maximum
Finite-Lived Intangible Assets [Line Items]
Useful Life	10 years		10 years
Patent
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	949,920		843,145
Accumulated Amortization	235,472		205,472
Net Carrying Amount	714,448		637,673
Useful Life	12 years
Useful Life	Varied	[1]	Varied	[1]

[1] patent rights are amortized over their expected useful life which is generally the legal life of the patent. As of June 30, 2012, the weighted average remaining useful life of these assets in service was approximately 12 years.