Goodwill and Intangible Assets - Intangible Assets Other than Goodwill (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Acquired Indefinite-lived Intangible Assets [Line Items]
Amortized intangible assets, gross carrying amount	$ 7,563	$ 2,450
Accumulated amortization	(1,617)	(868)
Total	5,946	1,582
Not amortized intangible assets, carrying amount	1,642	1,533
Intangible assets, gross carrying amount	9,205	3,983
Intangible assets, net carrying amount	7,588	3,115
Amortization of Intangible Assets	800	200	$ 200
TASER trademark
Acquired Indefinite-lived Intangible Assets [Line Items]
Not amortized intangible assets, carrying amount	900	900
Patents and trademarks pending
Acquired Indefinite-lived Intangible Assets [Line Items]
Not amortized intangible assets, carrying amount	$ 742	633
Domain names
Acquired Indefinite-lived Intangible Assets [Line Items]
Amortized intangible assets, useful life	5 years
Amortized intangible assets, gross carrying amount	$ 125	125
Accumulated amortization	(120)	(114)
Total	5	11
Issued patents
Acquired Indefinite-lived Intangible Assets [Line Items]
Amortized intangible assets, gross carrying amount	1,866	1,759
Accumulated amortization	(659)	(549)
Total	$ 1,207	1,210
Issued patents | Minimum
Acquired Indefinite-lived Intangible Assets [Line Items]
Amortized intangible assets, useful life	4 years
Issued patents | Maximum
Acquired Indefinite-lived Intangible Assets [Line Items]
Amortized intangible assets, useful life	15 years
Issued trademarks
Acquired Indefinite-lived Intangible Assets [Line Items]
Amortized intangible assets, gross carrying amount	$ 603	566
Accumulated amortization	(255)	(205)
Total	$ 348	361
Issued trademarks | Minimum
Acquired Indefinite-lived Intangible Assets [Line Items]
Amortized intangible assets, useful life	3 years
Issued trademarks | Maximum
Acquired Indefinite-lived Intangible Assets [Line Items]
Amortized intangible assets, useful life	11 years
Customer relationships
Acquired Indefinite-lived Intangible Assets [Line Items]
Amortized intangible assets, gross carrying amount	$ 1,035	0
Accumulated amortization	(93)	0
Total	$ 942	0
Customer relationships | Minimum
Acquired Indefinite-lived Intangible Assets [Line Items]
Amortized intangible assets, useful life	4 years
Customer relationships | Maximum
Acquired Indefinite-lived Intangible Assets [Line Items]
Amortized intangible assets, useful life	8 years
Non-compete agreements
Acquired Indefinite-lived Intangible Assets [Line Items]
Amortized intangible assets, gross carrying amount	$ 464	0
Accumulated amortization	(164)	0
Total	$ 300	0
Non-compete agreements | Minimum
Acquired Indefinite-lived Intangible Assets [Line Items]
Amortized intangible assets, useful life	3 years
Non-compete agreements | Maximum
Acquired Indefinite-lived Intangible Assets [Line Items]
Amortized intangible assets, useful life	4 years
Developed technology
Acquired Indefinite-lived Intangible Assets [Line Items]
Amortized intangible assets, useful life	7 years
Amortized intangible assets, gross carrying amount	$ 3,470	0
Accumulated amortization	(326)	0
Total	$ 3,144	$ 0