Segment Data - Additional Information (Detail) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2017 USD ($) Segment	Jun. 30, 2016 USD ($)
Segment Reporting [Abstract]
Number of reportable segments of company | Segment			2
Segment Reporting Information [Line Items]
Product sales	$ 66,875	$ 53,867	$ 134,366	$ 104,542
Service revenue	12,768	4,889	24,519	9,744
Net sales	79,643	58,756	158,885	114,286
Cost of products sold	30,172	20,054	57,244	37,509
Cost of services delivered	3,834	1,403	7,334	2,576
Gross margin	45,637	37,299	94,307	74,201
Sales, general and administrative	31,824	24,379	62,681	49,212
Research and development	12,989	6,710	25,452	13,637
Income from operations	824	6,210	6,174	11,352
Purchase of property and equipment	3,398	684	5,741	1,964
Purchase of intangible assets	75	87	170	185
Purchase of property and equipment and intangible assets in connection with business acquisition			8,526	0
Depreciation and amortization	1,796	942	3,400	1,843
Operating Segments | TASER Weapons
Segment Reporting Information [Line Items]
Product sales	53,016	45,536	110,687	91,370
Service revenue	0	0	0	0
Net sales	53,016	45,536	110,687	91,370
Cost of products sold	16,078	14,489	34,104	28,566
Cost of services delivered	0	0	0	0
Gross margin	36,938	31,047	76,583	62,804
Sales, general and administrative	17,492	14,684	34,708	29,956
Research and development	1,863	1,245	4,075	2,365
Income from operations	17,583	15,118	37,800	30,483
Purchase of property and equipment	2,641	594	3,574	1,665
Purchase of intangible assets	56	51	120	113
Purchase of property and equipment and intangible assets in connection with business acquisition			0	0
Depreciation and amortization	716	560	1,557	1,132
Operating Segments | Software and Sensors
Segment Reporting Information [Line Items]
Product sales	13,859	8,331	23,679	13,172
Service revenue	12,768	4,889	24,519	9,744
Net sales	26,627	13,220	48,198	22,916
Cost of products sold	14,094	5,565	23,140	8,943
Cost of services delivered	3,834	1,403	7,334	2,576
Gross margin	8,699	6,252	17,724	11,397
Sales, general and administrative	14,332	9,695	27,973	19,256
Research and development	11,126	5,465	21,377	11,272
Income from operations	(16,759)	(8,908)	(31,626)	(19,131)
Purchase of property and equipment	757	90	2,167	299
Purchase of intangible assets	19	36	50	72
Purchase of property and equipment and intangible assets in connection with business acquisition			8,526	0
Depreciation and amortization	$ 1,080	$ 382	$ 1,843	$ 711