Segment Data - Additional Information (Detail) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) Segment	Sep. 30, 2014 USD ($)
Segment Reporting [Abstract]
Number of reportable segments of company | Segment			2
Segment Reporting Information [Line Items]
Product sales	$ 47,265	$ 43,191	$ 133,863	$ 114,972
Service revenue	3,111	1,158	7,988	2,737
Net sales	50,376	44,349	141,851	117,709
Cost of products sold	18,274	15,138	47,497	42,135
Cost of services delivered	1,034	498	2,695	1,439
Gross margin	31,068	28,713	91,659	74,135
Sales, general and administrative	17,834	12,441	47,842	39,734
Research and development	6,528	3,759	16,992	10,820
Income from operations	6,706	12,513	26,825	23,581
Purchase of property and equipment	2,069	844	3,839	2,066
Purchase of intangible assets	201	16	402	125
Purchase of property and equipment and intangible assets in connection with business acquisitions	3,005	0	12,804	0
Depreciation and amortization	948	1,101	2,310	3,368
Operating Segments | TASER Weapons
Segment Reporting Information [Line Items]
Product sales	39,520	40,010	115,686	105,160
Service revenue	0	0	0	0
Net sales	39,520	40,010	115,686	105,160
Cost of products sold	12,445	12,443	34,805	34,024
Cost of services delivered	0	0	0	0
Gross margin	27,075	27,567	80,881	71,136
Sales, general and administrative	11,941	10,028	33,469	32,218
Research and development	1,151	1,050	3,418	2,660
Income from operations	13,983	16,489	43,994	36,258
Purchase of property and equipment	1,900	803	2,435	1,836
Purchase of intangible assets	114	14	195	123
Purchase of property and equipment and intangible assets in connection with business acquisitions	1,503	0	1,503	0
Depreciation and amortization	603	1,010	1,689	3,078
Operating Segments | Axon
Segment Reporting Information [Line Items]
Product sales	7,745	3,181	18,177	9,812
Service revenue	3,111	1,158	7,988	2,737
Net sales	10,856	4,339	26,165	12,549
Cost of products sold	5,829	2,695	12,692	8,111
Cost of services delivered	1,034	498	2,695	1,439
Gross margin	3,993	1,146	10,778	2,999
Sales, general and administrative	5,893	2,413	14,373	7,516
Research and development	5,377	2,709	13,574	8,160
Income from operations	(7,277)	(3,976)	(17,169)	(12,677)
Purchase of property and equipment	169	41	1,404	230
Purchase of intangible assets	87	2	207	2
Purchase of property and equipment and intangible assets in connection with business acquisitions	1,502	0	11,301	0
Depreciation and amortization	$ 345	$ 91	$ 621	$ 290