Business Acquisitions (Details)				9 Months Ended
	Jul. 01, 2017 USD ($)	Feb. 08, 2017 USD ($)	Dec. 30, 2016 USD ($) employee	Sep. 30, 2017 USD ($)	Dec. 31, 2016 USD ($)
Business Acquisition [Line Items]
Goodwill				$ 14,923,000	$ 10,442,000
TASER Weapons
Business Acquisition [Line Items]
Goodwill				1,451,000	562,000
Software and Sensors
Business Acquisition [Line Items]
Goodwill				13,472,000	$ 9,880,000
Axon Artificial Intelligence
Business Acquisition [Line Items]
Goodwill			$ 1,615,000
Number of researchers and software engineers | employee			7
Purchase price			$ 6,825,000
Cash consideration			3,500,000
Contingent consideration			$ 3,300,000
Earn-out, amounts earned				0
Intangible assets, weighted average useful life			5 years
Dextro, Inc.
Business Acquisition [Line Items]
Goodwill		$ 2,703,000
Purchase price		7,487,000
Contingent consideration		$ 1,000,000
Earn-out, amounts earned				$ 0
Intangible assets, weighted average useful life		3 years 4 months 24 days
Additional earn-out provisions and compensation adjustments		$ 1,400,000
Acquisition transaction costs		$ 200,000
Breon Enterprises
Business Acquisition [Line Items]
Goodwill	$ 1,650,000
Purchase price	$ 4,150,000
Intangible assets, weighted average useful life	2 years 1 month 6 days
Settlement of receivables from acquiree	$ 2,200,000
Breon Enterprises | TASER Weapons
Business Acquisition [Line Items]
Goodwill	800,000
Breon Enterprises | Software and Sensors
Business Acquisition [Line Items]
Goodwill	$ 800,000