Segment Data - Additional Information (Detail) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($) Segment	Sep. 30, 2016 USD ($)
Segment Reporting [Abstract]
Number of reportable segments of company | Segment			2
Segment Reporting Information [Line Items]
Net sales from products	$ 73,985	$ 63,204	$ 208,351	$ 167,745
Net sales from services	16,277	8,678	40,796	18,423
Net sales	90,262	71,882	249,147	186,168
Cost of product sales	34,573	23,664	91,817	61,172
Cost of service sales	5,924	1,653	13,258	4,230
Cost of sales	40,497	25,317	105,075	65,402
Gross margin	49,765	46,565	144,072	120,766
Sales, general and administrative	36,398	28,121	99,079	77,333
Research and development	14,166	7,358	39,618	20,995
Income (loss) from operations	(799)	11,086	5,375	22,438
Purchase of property and equipment	3,331	1,371	9,072	3,335
Purchase of intangible assets	261	154	431	339
Purchase of intangible assets, including goodwill, in connection with business acquisition	4,150	0	10,629	0
Depreciation and amortization	2,277	901	5,677	2,744
Operating Segments | TASER Weapons
Segment Reporting Information [Line Items]
Net sales from products	59,416	52,938	170,103	144,307
Net sales from services	0	0	0	0
Net sales	59,416	52,938	170,103	144,307
Cost of product sales	19,237	14,973	53,341	43,998
Cost of service sales	0	0	0	0
Cost of sales	19,237	14,973	53,341	43,998
Gross margin	40,179	37,965	116,762	100,309
Sales, general and administrative	20,575	16,439	55,283	46,395
Research and development	1,856	1,408	5,931	3,773
Income (loss) from operations	17,748	20,118	55,548	50,141
Purchase of property and equipment	1,666	1,064	5,240	2,729
Purchase of intangible assets	66	77	186	190
Purchase of intangible assets, including goodwill, in connection with business acquisition	2,075	0	2,075	0
Depreciation and amortization	542	537	2,099	1,669
Operating Segments | Software and Sensors
Segment Reporting Information [Line Items]
Net sales from products	14,569	10,266	38,248	23,438
Net sales from services	16,277	8,678	40,796	18,423
Net sales	30,846	18,944	79,044	41,861
Cost of product sales	15,336	8,691	38,476	17,174
Cost of service sales	5,924	1,653	13,258	4,230
Cost of sales	21,260	10,344	51,734	21,404
Gross margin	9,586	8,600	27,310	20,457
Sales, general and administrative	15,823	11,682	43,796	30,938
Research and development	12,310	5,950	33,687	17,222
Income (loss) from operations	(18,547)	(9,032)	(50,173)	(27,703)
Purchase of property and equipment	1,665	307	3,832	606
Purchase of intangible assets	195	77	245	149
Purchase of intangible assets, including goodwill, in connection with business acquisition	2,075	0	8,554	0
Depreciation and amortization	$ 1,735	$ 364	$ 3,578	$ 1,075