Goodwill and Intangible Assets - Intangible Assets Other than Goodwill (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Acquired Indefinite-lived Intangible Assets [Line Items]
Not amortized intangible assets, Carrying Amount	$ 1,915	$ 1,854
Amortized intangible assets, Gross Carrying Amount	2,091	2,030
Intangible assets, Gross Carrying Amount	4,006	3,884
Accumulated Amortization	(690)	(567)
Amortized intangible assets, Net Carrying Amount	1,401	1,463
Intangible assets, Net Carrying Amount	3,317	3,317
Domain Names [Member]
Acquired Indefinite-lived Intangible Assets [Line Items]
Amortized intangible assets, Useful Life	5 years
Amortized intangible assets, Gross Carrying Amount	125	139
Accumulated Amortization	(102)	(104)
Amortized intangible assets, Net Carrying Amount	23	35
Issued Patents [Member]
Acquired Indefinite-lived Intangible Assets [Line Items]
Amortized intangible assets, Gross Carrying Amount	1,529	1,529
Accumulated Amortization	(441)	(361)
Amortized intangible assets, Net Carrying Amount	1,088	1,168
Issued Patents [Member] | Minimum [Member]
Acquired Indefinite-lived Intangible Assets [Line Items]
Amortized intangible assets, Useful Life	4 years
Issued Patents [Member] | Maximum [Member]
Acquired Indefinite-lived Intangible Assets [Line Items]
Amortized intangible assets, Useful Life	15 years
Issued Trademarks [Member]
Acquired Indefinite-lived Intangible Assets [Line Items]
Amortized intangible assets, Gross Carrying Amount	437	362
Accumulated Amortization	(147)	(102)
Amortized intangible assets, Net Carrying Amount	290	260
Issued Trademarks [Member] | Minimum [Member]
Acquired Indefinite-lived Intangible Assets [Line Items]
Amortized intangible assets, Useful Life	9 years
Issued Trademarks [Member] | Maximum [Member]
Acquired Indefinite-lived Intangible Assets [Line Items]
Amortized intangible assets, Useful Life	11 years
TASER Trademark [Member]
Acquired Indefinite-lived Intangible Assets [Line Items]
Not amortized intangible assets, Carrying Amount	900	900
Patents and Trademarks Pending [Member]
Acquired Indefinite-lived Intangible Assets [Line Items]
Not amortized intangible assets, Carrying Amount	$ 1,015	$ 954