Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2012

Intangible Assets and Accumulated Amortization

The balances as of December 31, 2012, including intangible assets and accumulated amortization, are detailed as follows:

	As of December 31, 2012
Finite-Lived Intangible Assets	Amortization Period (Years)		Gross Carrying Amount		Accumulated Amortization			Net
Patents		15	$	320,795	$	(183,059	)	$	137,736

The balances as of December 31, 2011, including intangible assets and accumulated amortization, are detailed as follows:

	As of December 31, 2011
Finite-Lived Intangible Assets	Amortization Period (Years)		Gross Carrying Amount		Accumulated Amortization			Net
Patents		15	$	320,795	$	(159,976	)	$	160,819