Other long-term assets (Tables)

6 Months Ended

Jun. 30, 2012

Other long-term assets [Abstract]

Schedule of Other Long-Term Assets

	June 30, 2012 (Unaudited)		December 31, 2011
Patents, trademarks and applications, net of accumulated amortization of $308,949 and $273,550	$	1,187,739	$	1,214,748
Goodwill		387,239		387,239
Other		6,811		9,665
	$	1,581,789	$	1,611,652