Segment Data - Summary of Operational Information Relative to the Company's Reportable Segments (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Sales Information [Line Items]
Product sales	$ 34,730,265	$ 28,613,527	$ 96,755,347	$ 82,239,187
Service revenue	466,557	159,429	1,050,924	397,604
Net sales	35,196,822	28,772,956	97,806,271	82,636,791
Cost of products sold	12,803,690	10,855,276	35,974,812	30,781,354
Cost of services delivered	297,127	1,114,668	1,542,087	3,308,794
Gross margin	22,096,005	16,803,012	60,289,372	48,546,643
Sales, general & administrative	12,775,980	9,539,996	34,898,005	26,798,629
Research & development	2,439,812	1,985,701	6,444,432	6,156,751
Litigation judgment recovery				(2,200,000)
Income (loss) from operations	6,880,213	5,277,315	18,946,935	17,791,263
Purchases of property and equipment	335,425	285,307	1,174,420	887,609
Purchases of intangible assets	68,951	85,876	271,144	337,863
Depreciation and amortization	1,088,071	1,718,546	4,036,337	5,113,989
Taser Weapons [Member] | Operating Segments [Member]
Sales Information [Line Items]
Product sales	31,626,484	27,085,180	89,901,959	78,774,581
Service revenue
Net sales	31,626,484	27,085,180	89,901,959	78,774,581
Cost of products sold	10,906,999	9,673,370	31,534,576	28,068,676
Cost of services delivered
Gross margin	20,719,485	17,411,810	58,367,383	50,705,905
Sales, general & administrative	11,130,971	8,618,250	30,622,109	24,373,401
Research & development	1,160,400	1,043,607	3,126,589	2,806,043
Litigation judgment recovery				(2,200,000)
Income (loss) from operations	8,428,114	7,749,953	24,618,685	25,726,461
Purchases of property and equipment	229,965	217,092	827,896	530,383
Purchases of intangible assets	66,844	76,148	260,431	322,337
Depreciation and amortization	1,025,164	1,054,239	2,997,848	3,336,403
EVIDENCE.com & Video [Member] | Operating Segments [Member]
Sales Information [Line Items]
Product sales	3,103,781	1,528,347	6,853,388	3,464,606
Service revenue	466,557	159,429	1,050,924	397,604
Net sales	3,570,338	1,687,776	7,904,312	3,862,210
Cost of products sold	1,896,691	1,181,906	4,440,236	2,712,678
Cost of services delivered	297,127	1,114,668	1,542,087	3,308,794
Gross margin	1,376,520	(608,798)	1,921,989	(2,159,262)
Sales, general & administrative	1,645,009	921,746	4,275,896	2,425,228
Research & development	1,279,412	942,094	3,317,843	3,350,708
Litigation judgment recovery
Income (loss) from operations	(1,547,901)	(2,472,638)	(5,671,750)	(7,935,198)
Purchases of property and equipment	105,460	68,215	346,524	357,226
Purchases of intangible assets	2,107	9,728	10,713	15,526
Depreciation and amortization	$ 62,907	$ 664,307	$ 1,038,489	$ 1,777,586