Goodwill and Intangible Assets - Intangible Assets Other than Goodwill (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Acquired Indefinite-lived Intangible Assets [Line Items]
Amortized intangible assets, Gross Carrying Amount	$ 7,513	$ 7,563
Accumulated Amortization	(2,062)	(1,617)
Total	5,451	5,946
Not amortized intangible assets, Carrying Amount	1,777	1,642
Intangible assets, Gross Carrying Amount	9,290	9,205
Intangible assets, Net Carrying Amount	7,228	7,588
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	$ 877	742
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)	(120)
Total	5	5
Issued patents
Acquired Indefinite-lived Intangible Assets [Line Items]
Amortized intangible assets, Gross Carrying Amount	1,882	1,866
Accumulated Amortization	(719)	(659)
Total	$ 1,163	1,207
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	$ 616	603
Accumulated Amortization	(284)	(255)
Total	$ 332	348
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	$ 966	1,035
Accumulated Amortization	(168)	(93)
Total	$ 798	942
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	$ 454	464
Accumulated Amortization	(198)	(164)
Total	$ 256	300
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	3,470
Accumulated Amortization	(573)	(326)
Total	$ 2,897	$ 3,144