Segment Data - Additional Information (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($) Segment	Mar. 31, 2016 USD ($)
Segment Reporting [Abstract]
Number of reportable segments of company | Segment	2
Segment Reporting Information [Line Items]
Product sales	$ 67,491	$ 50,675
Service revenue	11,751	4,855
Net sales	79,242	55,530
Cost of products sold	27,072	17,455
Cost of services delivered	3,500	1,173
Gross margin	48,670	36,902
Sales, general and administrative	30,857	24,833
Research and development	12,463	6,927
Income from operations	5,350	5,142
Purchase of property and equipment	2,343	1,280
Purchase of intangible assets	95	98
Purchase of property and equipment and intangible assets in connection with business acquisition	6,479	0
Depreciation and amortization	1,604	901
Operating Segments | TASER Weapons
Segment Reporting Information [Line Items]
Product sales	57,671	45,834
Service revenue	0	0
Net sales	57,671	45,834
Cost of products sold	18,026	14,077
Cost of services delivered	0	0
Gross margin	39,645	31,757
Sales, general and administrative	17,216	15,272
Research and development	2,212	1,120
Income from operations	20,217	15,365
Purchase of property and equipment	933	1,071
Purchase of intangible assets	64	62
Purchase of property and equipment and intangible assets in connection with business acquisition	0	0
Depreciation and amortization	841	572
Operating Segments | Software and Sensors
Segment Reporting Information [Line Items]
Product sales	9,820	4,841
Service revenue	11,751	4,855
Net sales	21,571	9,696
Cost of products sold	9,046	3,378
Cost of services delivered	3,500	1,173
Gross margin	9,025	5,145
Sales, general and administrative	13,641	9,561
Research and development	10,251	5,807
Income from operations	(14,867)	(10,223)
Purchase of property and equipment	1,410	209
Purchase of intangible assets	31	36
Purchase of property and equipment and intangible assets in connection with business acquisition	6,479	0
Depreciation and amortization	$ 763	$ 329