Intangible assets

6 Months Ended

Jun. 30, 2011

Intangible assets [Abstract]

Intangible assets

4. Intangible assets

Intangible assets consisted of the following at June 30, 2011 and December 31, 2010:

		June 30, 2011						December 31, 2010
		Gross				Net		Gross				Net
		Carrying		Accumulated		Carrying		Carrying		Accumulated		Carrying
	Useful Life	Amount		Amortization		Amount		Amount		Amortization		Amount
Amortized intangible assets:
Domain names	5 Years	$	168,428	$	88,894	$	79,534	$	237,911	$	66,006	$	171,905
Issued patents	4 to 15 Years		1,370,969		299,476		1,071,493		1,040,148		264,716		775,432
Issued trademarks	9 to 11 Years		235,600		50,056		185,544		207,721		37,659		170,062
Non compete agreements	5 to 7 Years		150,000		140,000		10,000		150,000		130,000		20,000
			1,924,997		578,426		1,346,571		1,635,780		498,381		1,137,399
Unamortized intangible assets:
TASER Trademark			900,000				900,000		900,000				900,000
Patents and trademarks pending			899,340				899,340		1,053,477				1,053,477
			1,799,340				1,799,340		1,953,477				1,953,477
		$	3,724,337	$	578,426	$	3,145,911	$	3,589,257	$	498,381	$	3,090,876

Amortization expense for the three and six months ended June 30, 2011, was approximately $41,000 and $80,000, respectively. Amortization expense for the three and six months ended June 30, 2010, was approximately $24,000 and $48,000, respectively. Estimated amortization expense of intangible assets for the remaining six months of 2011, the next five years ended December 31, and thereafter is as follows:

2011 (remainder of year)	$	74,546
2012		129,093
2013		129,096
2014		128,179
2015		119,427
2016		106,556
Thereafter		659,674
	$	1,346,571