Segment Data - Additional Information (Detail) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($) Segment	Jun. 30, 2014 USD ($)
Segment Reporting [Abstract]
Number of reportable segments of company | Segment			2
Segment Reporting Information [Line Items]
Net sales	$ 46,713	$ 37,175	$ 91,475	$ 73,360
Gross margin	30,723	23,214	60,591	45,422
Sales, general and administrative	15,443	13,547	30,008	27,293
Research and development	5,906	3,455	10,464	7,061
Income from operations	9,374	6,212	20,119	11,068
Purchase of property and equipment			1,770	1,222
Purchase of intangible assets			201	109
Depreciation and amortization			1,362	2,267
Operating Segments
Segment Reporting Information [Line Items]
Product sales	43,755	36,268	86,598	71,781
Service revenue	2,958	907	4,877	1,579
Net sales		37,175	91,475	73,360
Cost of products sold	14,994	13,423	29,223	26,997
Cost of services delivered	996	538	1,661	941
Gross margin		23,214	60,591	45,422
Sales, general and administrative		13,547	30,008	27,293
Research and development		3,455	10,464	7,061
Income from operations	9,374	6,212	20,119	11,068
Purchase of property and equipment	1,346	423	1,770	1,222
Purchase of intangible assets	151	42	201	109
Purchase of property and equipment and intangible assets in connection with business acquisition	9,779	0	9,779	0
Depreciation and amortization	745	1,105		2,267
Operating Segments | TASER Weapons
Segment Reporting Information [Line Items]
Product sales	37,825	32,675	76,166	65,150
Service revenue	0	0	0	0
Net sales	37,825	32,675	76,166	65,150
Cost of products sold	11,278	10,663	22,359	21,581
Cost of services delivered	0	0	0	0
Gross margin	26,547	22,012	53,807	43,569
Sales, general and administrative	10,823	10,901	21,528	22,190
Research and development	1,077	793	2,267	1,610
Income from operations	14,647	10,318	30,012	19,769
Purchase of property and equipment	188	336	535	1,033
Purchase of intangible assets	35	42	81	109
Purchase of property and equipment and intangible assets in connection with business acquisition	0	0	0	0
Depreciation and amortization	556	990	1,086	2,068
Operating Segments | Axon
Segment Reporting Information [Line Items]
Product sales	5,930	3,593	10,432	6,631
Service revenue	2,958	907	4,877	1,579
Net sales	8,888	4,500	15,309	8,210
Cost of products sold	3,716	2,760	6,864	5,416
Cost of services delivered	996	538	1,661	941
Gross margin	4,176	1,202	6,784	1,853
Sales, general and administrative	4,620	2,646	8,480	5,103
Research and development	4,829	2,662	8,197	5,451
Income from operations	(5,273)	(4,106)	(9,893)	(8,701)
Purchase of property and equipment	1,158	87	1,235	189
Purchase of intangible assets	116	0	120	0
Purchase of property and equipment and intangible assets in connection with business acquisition	9,779	0	9,779	0
Depreciation and amortization	$ 189	$ 115	$ 276	$ 199