Intangible assets

3 Months Ended

Mar. 31, 2012

Intangible assets [Abstract]

Intangible assets

4. Intangible assets

Intangible assets consisted of the following at March 31, 2012 and December 31, 2011:

			March 31, 2012							December 31, 2011
	Useful Life		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Amortized intangible assets:
Domain names		5 Years	$	139,431	$	(94,917	)	$	44,514	$	139,431	$	(91,943	)	$	47,488
Issued patents		4 to 15 Years		1,422,471		(296,022	)		1,126,449		1,500,192		(342,940	)		1,157,252
Issued trademarks		9 to 11 Years		297,321		(73,265	)		224,056		293,183		(65,028	)		228,155
Non compete agreements		5 to 7 Years		150,000		(150,000	)		—		150,000		(150,000	)		—
Total amortized				2,009,223		(614,204	)		1,395,019		2,082,806		(649,911	)		1,432,895
Not amortized intangible assets:
TASER trademark				900,000					900,000		900,000					900,000
Patents and trademarks pending				944,083					944,083		891,111					891,111
Total not amortized				1,844,083					1,844,083		1,791,111					1,791,111
Total intangible assets			$	3,853,306	$	(614,204	)	$	3,239,102	$	3,873,917	$	(649,911	)	$	3,224,006

Amortization expense relative to intangible assets for the three months ended March 31, 2012 and 2011 was approximately $34,000 and $39,000, respectively. Estimated amortization expense of intangible assets for the remaining nine months of 2012, the next five years ended December 31, and thereafter is as follows:

2012 (remaining nine months)	$	99,610
2013		132,815
2014		131,899
2015		123,148
2016		116,076
2017		113,405
Thereafter		678,066
Total	$	1,395,019