Number of revenue sources.

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- Definition

Revenue From Contract With Customer, Payment Due Date, From Date Of Invoice

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Amount of amortization expense for asset recognized from cost incurred to obtain or fulfill contract with customer.

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The net amount of operating interest income (expense).

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The cumulative amount of the reporting entity's undistributed earnings or deficit.

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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Percentage of remaining performance obligation to total remaining performance obligation not recognized as revenue.

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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.

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Revenues - Additional Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
Revenues - Additional Information (Details) $ in Thousands	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($) source day	Sep. 30, 2017 USD ($)	Jan. 01, 2018 USD ($)	Dec. 31, 2017 USD ($)
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Retained earnings (accumulated deficit)	$ 169,301		$ 169,301		$ 142,179	$ 123,185
Revenue from contract with customers	104,836	$ 90,262	305,277	$ 249,147
Sales, general and administrative	(39,685)	(36,398)	$ (114,787)	(99,079)
Number of revenue sources \| source			2
Payment due date from date of invoice \| day			30
Amortization of deferred sales commissions	1,500		$ 3,800
Impact of Adoption of Topic 606 on Opening Balance Sheet \| Accounting Standards Update 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Retained earnings (accumulated deficit)					$ 18,994	$ 19,000
Revenue from contract with customers	2,100		4,400
Sales, general and administrative	400		2,000
Taser 60 Plan
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue from contract with customers	11,900	7,500	36,100	20,800
Interest income (expense), net	$ 400	$ 200	$ 1,000	$ 500
Minimum
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, remaining performance obligation to be recognized in the next twelve months, percent	15.00%		15.00%
Maximum
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, remaining performance obligation to be recognized in the next twelve months, percent	20.00%		20.00%