Segment Data - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015 Segment	Mar. 31, 2014
Segment Reporting [Abstract]
Number of reportable segments of company	2us-gaap_NumberOfReportableSegments
Segment Reporting Information [Line Items]
Product sales	$ 42,843us-gaap_SalesRevenueGoodsNet	$ 35,513us-gaap_SalesRevenueGoodsNet
Service revenue	1,919us-gaap_SalesRevenueServicesNet	672us-gaap_SalesRevenueServicesNet
Net sales	44,762us-gaap_SalesRevenueNet	36,185us-gaap_SalesRevenueNet
Cost of products sold	14,229us-gaap_CostOfGoodsSold	13,574us-gaap_CostOfGoodsSold
Cost of services delivered	665us-gaap_CostOfServices	403us-gaap_CostOfServices
Gross margin	29,868us-gaap_GrossProfit	22,208us-gaap_GrossProfit
Sales, general and administrative	14,565	13,746
Research and development	4,558us-gaap_ResearchAndDevelopmentExpense	3,606us-gaap_ResearchAndDevelopmentExpense
Income from operations	10,745us-gaap_OperatingIncomeLoss	4,856us-gaap_OperatingIncomeLoss
Purchase of property and equipment	424	799
Purchase of intangible assets	50	67
Depreciation and amortization	617	1,162
TASER Weapons
Segment Reporting Information [Line Items]
Product sales	38,341	32,475
Service revenue	0	0
Net sales	38,341	32,475
Cost of products sold	11,081	10,918
Cost of services delivered	0	0
Gross margin	27,260	21,557
Sales, general and administrative	10,705	11,289
Research and development	1,190	817
Income from operations	15,365	9,451
Purchase of property and equipment	347	697
Purchase of intangible assets	46	67
Depreciation and amortization	530	1,078
AXON
Segment Reporting Information [Line Items]
Product sales	4,502	3,038
Service revenue	1,919	672
Net sales	6,421	3,710
Cost of products sold	3,148	2,656
Cost of services delivered	665	403
Gross margin	2,608	651
Sales, general and administrative	3,860	2,457
Research and development	3,368	2,789
Income from operations	(4,620)	(4,595)
Purchase of property and equipment	77	102
Purchase of intangible assets	4	0
Depreciation and amortization	$ 87	$ 84

Total costs related to goods produced and sold during the reporting period.

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- Definition

Total costs related to services rendered by an entity during the reporting period.

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- Definition

The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

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Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

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- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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- Definition

The net result for the period of deducting operating expenses from operating revenues.

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No definition available.

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- Definition

The cash outflow to acquire asset without physical form usually arising from contractual or other legal rights, excluding goodwill.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

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-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

-Subparagraph (c)

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The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

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- Definition

The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 985

-SubTopic 20

-Section 50

-Paragraph 1

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-Name Accounting Standards Codification

-Topic 730

-SubTopic 10

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-Paragraph 1

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- Definition

Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts.

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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

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Aggregate revenue during the period from services rendered in the normal course of business, after deducting allowances and discounts.

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- Definition

The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.4)

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-Name Accounting Standards Codification

-Topic 330

-SubTopic 10

-Section 30

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=51677171&loc=d3e3636-108311

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