Axon Enterprise (AXON) 10-Q 9 Nov 16 2016 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2016	Oct. 31, 2016
Document And Entity Information [Abstract]
Entity Registrant Name	TASER INTERNATIONAL INC
Entity Central Index Key	1,069,183
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Sep. 30, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		52,281,856

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 50,600	$ 59,526
Short-term investments	45,620	50,254
Accounts and notes receivable, net of allowance of $431 and $322 as of September 30, 2016 and December 31, 2015, respectively	32,858	27,701
Inventory, net	25,503	15,763
Prepaid expenses and other current assets	13,867	8,165
Total current assets	168,448	161,409
Property and equipment, net of accumulated depreciation of $37,653 and $36,020 as of September 30, 2016 and December 31, 2015, respectively	22,976	21,848
Deferred income tax assets, net	16,753	13,719
Intangible assets, net	7,116	7,588
Goodwill	8,885	9,596
Long-term investments	6,260	8,525
Other assets	21,762	7,196
Total assets	252,200	229,881
Current liabilities:
Accounts payable	8,982	7,333
Accrued liabilities	16,086	8,643
Current portion of deferred revenue	41,284	20,851
Customer deposits	1,367	1,226
Current portion of notes payable and capital lease payable	51	87
Total current liabilities	67,770	38,140
Deferred revenue, net of current portion	35,968	30,190
Liability for unrecognized tax benefits	1,332	1,315
Long-term deferred compensation	3,111	2,199
Long-term business acquisition contingent consideration	0	952
Other long-term liabilities	2,691	81
Total liabilities	110,872	72,877
Commitments and contingencies
Stockholders’ equity:
Preferred stock, $0.00001 par value; 25,000,000 shares authorized; no shares issued and outstanding as of September 30, 2016 and December 31, 2015	0	0
Common stock, $0.00001 par value; 200,000,000 shares authorized; 52,245,605 and 53,692,192 shares issued and outstanding as of September 30, 2016 and December 31, 2015, respectively	1	1
Additional paid-in capital	184,937	178,143
Treasury stock at cost, 20,220,227 and 18,432,158 shares as of September 30, 2016 and December 31, 2015, respectively	(155,947)	(122,201)
Retained earnings	111,934	100,978
Accumulated other comprehensive income	403	83
Total stockholders’ equity	141,328	157,004
Total liabilities and stockholders’ equity	$ 252,200	$ 229,881

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Allowance on accounts receivable	$ 431	$ 322
Accumulated depreciation	$ 37,653	$ 36,020
Preferred stock, par value (in dollars per share)	$ 0.00001	$ 0.00001
Preferred stock, shares authorized	25,000,000	25,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in dollars per share)	$ 0.00001	$ 0.00001
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	52,245,605	53,692,192
Common stock, shares outstanding	52,245,605	53,692,192
Treasury stock, shares	20,220,227	18,432,158

Unaudited Condensed Consolidate

Unaudited Condensed Consolidated Statements of Operations and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Statement [Abstract]
Net sales	$ 71,882	$ 50,376	$ 186,168	$ 141,851
Cost of products sold and services delivered	25,317	19,308	65,402	50,192
Gross margin	46,565	31,068	120,766	91,659
Operating expenses:
Sales, general and administrative	28,121	17,834	77,333	47,842
Research and development	7,358	6,528	20,995	16,992
Total operating expenses	35,479	24,362	98,328	64,834
Income from operations	11,086	6,706	22,438	26,825
Interest income and other (expense) income, net	(455)	(22)	(460)	12
Income before provision for income taxes	10,631	6,684	21,978	26,837
Provision for income taxes	6,788	5,163	11,022	12,008
Net income	$ 3,843	$ 1,521	$ 10,956	$ 14,829
Net income per common and common equivalent shares:
Basic (in dollars per share)	$ 0.07	$ 0.03	$ 0.21	$ 0.28
Diluted (in dollars per share)	$ 0.07	$ 0.03	$ 0.20	$ 0.27
Weighted average number of common and common equivalent shares outstanding:
Basic (in shares)	52,206	53,709	52,791	53,509
Diluted (in shares)	53,141	54,691	53,656	54,671
UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 3,843	$ 1,521	$ 10,956	$ 14,829
Foreign currency translation adjustments	61	(115)	320	(18)
Comprehensive income	$ 3,904	$ 1,406	$ 11,276	$ 14,811

Unaudited Condensed Consolidat5

Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash flows from operating activities:
Net income	$ 10,956	$ 14,829
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	2,744	2,310
Purchase accounting adjustments to goodwill	520
Loss on inventory nonmonetary exchanges	147
Loss (gain) on disposal of property and equipment, net	40	(13)
Loss on disposal of intangible assets	21	216
Bond premium amortization	980	1,252
Stock-based compensation	6,742	5,086
Deferred income taxes	(2,672)	(888)
Unrecognized tax benefits	17	(273)
Tax benefit from stock-based compensation	(919)	(6,314)
Change in assets and liabilities:
Accounts and notes receivable	(5,277)	7,718
Inventory	(10,804)	(37)
Prepaid expenses and other assets	(19,573)	(5,520)
Accounts payable, accrued and other liabilities	12,566	1,697
Deferred revenue	26,331	10,667
Customer deposits	140	(416)
Net cash provided by operating activities	21,959	30,314
Cash flows from investing activities:
Purchases of investments	(49,316)	(50,598)
Proceeds from call / maturity of investments	55,235	32,719
Purchases of property and equipment	(3,335)	(3,839)
Proceeds from disposal of property and equipment	40	13
Purchases of intangible assets	(339)	(402)
Business acquisitions, net of cash acquired	0	(11,186)
Net cash provided by (used in) investing activities	2,285	(33,293)
Cash flows from financing activities:
Repurchase of common stock	(33,746)	(7,556)
Proceeds from options exercised	431	2,573
Payroll tax payments for net-settled stock awards	(1,299)	(848)
Payments on capital lease obligation	(29)	(28)
Payments on notes payable	(77)	(26)
Tax benefit from stock-based compensation	919	6,314
Net cash (used in) provided by financing activities	(33,801)	429
Effect of exchange rate changes on cash and cash equivalents	631	70
Net decrease in cash and cash equivalents	(8,926)	(2,480)
Cash and cash equivalents, beginning of period	59,526	48,367
Cash and cash equivalents, end of period	50,600	45,887
Supplemental disclosure:
Cash paid for income taxes, net of refunds	11,308	5,830
Non-cash transactions
Property and equipment purchases in accounts payable and accrued liabilities	$ 145	$ 195

Organization and Summary of Sig

Organization and Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Summary of Significant Accounting Policies	Organization and Summary of Significant Accounting Policies TASER International, Inc. (“TASER” or the “Company”) is a developer and manufacturer of advanced conducted electrical weapons (“CEWs”) designed for use by law enforcement, military, corrections, and private security personnel, and by private individuals for personal defense. In addition, the Company has developed full technology solutions for the capture, storage and management of video/audio evidence as well as other tactical capabilities for use in law enforcement. The Company sells its products worldwide through its direct sales force, distribution partners, online store and third-party resellers. The Company was incorporated in Arizona in September 1993, and reincorporated in Delaware in January 2001. The Company’s corporate headquarters and manufacturing facilities are located in Scottsdale, Arizona. The Company’s software development unit facility is located in Seattle, Washington. TASER International BV, a wholly owned subsidiary of the Company, serves as the Company's international headquarters, and is located in Amsterdam, Netherlands. TASER International BV wholly owns two subsidiaries, Axon Public Safety U.K. LTD and Axon Public Safety AU, that serve as direct sales operations in the United Kingdom and Australia, respectively. In 2015, the Company formed Axon Public Safety Canada, Inc., a wholly owned subsidiary, to facilitate transactions for its products and services with new and existing customers located in Canada. The accompanying unaudited condensed consolidated financial statements include the accounts of the Company. All material intercompany accounts, transactions, and profits have been eliminated. a. Basis of Presentation and Use of Estimates These unaudited condensed consolidated financial statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission. Certain information related to the Company’s organization, significant accounting policies and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States (“US GAAP”) has been condensed or omitted. The accounting policies followed in the preparation of these unaudited condensed consolidated financial statements are consistent with those followed in the Company’s annual consolidated financial statements for the year ended December 31, 2015 , as filed on Form 10-K. In the opinion of management, these unaudited condensed consolidated financial statements contain all material adjustments, consisting only of normal recurring adjustments, necessary to fairly state the Company’s financial position, results of operations and cash flows for the periods presented and the presentations and disclosures herein are adequate when read in conjunction with the Company’s Form 10-K for the year ended December 31, 2015 . The results of operations for the three and nine months ended September 30, 2016 and 2015 are not necessarily indicative of the results to be expected for the full year (or any other period). Significant estimates and assumptions in these unaudited condensed consolidated financial statements include: • product warranty reserves, • inventory valuation, • revenue recognition allocated in multiple-deliverable contracts or arrangements, • valuation of goodwill, intangibles and long-lived assets, • recognition, measurement and valuation of current and deferred income taxes, • fair value of stock awards issued, the estimated vesting period for performance-based stock awards and forfeiture rates, and • recognition and measurement of contingencies and accrued litigation expense. Actual results could differ materially from those estimates. b. Segment Information The Company is comprised of two reportable segments: the manufacture and sale of CEWs, accessories and other products and services (the “TASER Weapons” segment); and the video business which includes the TASER Cam, Axon cameras and related accessories, Evidence.com and MediaSolv (the “Axon” segment). Reportable segments are determined based on discrete financial information reviewed by the Company’s Chief Executive Officer who is the Chief Operating Decision Maker (the “CODM”) for the Company. The Company organizes and reviews operations based on products and services, and currently there are no operating segments that are aggregated. The Company performs an annual analysis of its reportable segments. Additional information related to the Company’s business segments is summarized in Note 14. c. Geographic Information and Major Customers For the three and nine months ended September 30, 2016 and 2015 , net sales by geographic area were as follows (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 United States $ 60,558 84.2 % $ 43,689 86.7 % $ 155,245 83.4 % $ 117,885 83.1 % Other Countries 11,324 15.8 6,687 13.3 30,923 16.6 23,966 16.9 Total $ 71,882 100.0 % $ 50,376 100.0 % $ 186,168 100.0 % $ 141,851 100.0 % Sales to customers outside of the U.S. are typically denominated in U.S. dollars, and are attributed to each country based on the shipping address of the distributor or customer. For the three and nine months ended September 30, 2016 and 2015 , no individual country outside the U.S. represented more than 10% of net sales. Individual sales transactions in the international market are generally larger and occur more intermittently than in the domestic market due to the profile of the Company's customers. For the three and nine months ended September 30, 2016 and 2015 , no customer represented more than 10% of total net sales. At September 30, 2016 there was one outstanding customer balance from one unaffiliated customer that comprised 18.6% of the aggregate accounts receivable balance. At December 31, 2015 , the Company had a trade receivable from one unaffiliated customer comprising 12.5% of the aggregate accounts receivable balance. d. Income per Common Share Basic income per common share is computed by dividing net income by the weighted average number of common shares outstanding during the periods presented. Potentially dilutive securities include outstanding stock options and unvested restricted stock units. The dilutive effect of potentially dilutive securities is reflected in diluted earnings per share by application of the treasury stock method. Under the treasury stock method, an increase in the fair market value of the Company’s common stock can result in a greater dilutive effect from potentially dilutive securities. The calculation of the weighted average number of shares outstanding and earnings per share are as follows (in thousands except per share data): Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 Numerator for basic and diluted earnings per share: Net income $ 3,843 $ 1,521 $ 10,956 $ 14,829 Denominator: Weighted average shares outstanding - basic 52,206 53,709 52,791 53,509 Dilutive effect of stock-based awards 935 982 865 1,162 Diluted weighted average shares outstanding 53,141 54,691 53,656 54,671 Anti-dilutive stock-based awards excluded 227 160 304 160 Net income per common share: Basic $ 0.07 $ 0.03 $ 0.21 $ 0.28 Diluted $ 0.07 $ 0.03 $ 0.20 $ 0.27 e. Revenue Recognition, Deferred Revenue and Accounts and Notes Receivable The Company derives revenue from two primary sources: (1) the sale of physical products, including CEWs, Axon cameras, corresponding extended warranties, and related accessories such as E-docks, cartridges and batteries, among others, and (2) subscription to the Company's Evidence.com software as a service ("SaaS") (including data storage fees and other ancillary services), which includes varying levels of support. To a lesser extent, the Company also recognizes training and other professional services revenue. Revenue is recognized when persuasive evidence of an arrangement exists, delivery has occurred or services have been rendered, title has transferred, the price is fixed and collectability is reasonably assured. Contractual arrangements may contain explicit customer acceptance provisions, and under such arrangements, the Company defers recognition of revenue until formal customer acceptance is received. Extended warranty revenue, SaaS revenue and related data storage revenue are recognized ratably over the term of the contract beginning on the commencement date of each contract. Revenue arrangements with multiple deliverables are divided into separate units and revenue is allocated using the relative selling price method based upon vendor-specific objective evidence of selling price or third-party evidence of the selling prices if vendor-specific objective evidence of selling prices does not exist. If neither vendor-specific objective evidence nor third-party evidence exists, management uses its best estimate of selling price. The majority of the Company’s allocations of arrangement consideration under multiple element arrangements are performed using vendor-specific objective evidence by utilizing prices charged to customers for deliverables when sold separately. The Company’s multiple element arrangements may include future CEWs and/or Axon devices to be delivered at defined points within a multi-year contract, and in those arrangements, the Company allocates total arrangement consideration over the life of the multi-year contract to future deliverables using management’s best estimate of selling price. The Company has not utilized third party evidence of selling price. The Company offers the right to purchase extended warranties that include additional services and coverage beyond the standard limited warranty for certain products. Revenue for extended warranty purchases is deferred at the time of sale and recognized over the warranty period commencing on the date of sale. Extended warranties range from one to five years. Evidence.com and Axon cameras and related accessories have stand-alone value to the customer and are sometimes sold separately, but in most instances are sold together. In these instances, customers typically purchase and pay for the equipment and one year of Evidence.com in advance. Additional years of service are generally billed annually over a specified service term, which has typically ranged from one to five years. Generally, the Company recognizes revenue for the Axon equipment at the time of the sale consistent with the discussion of multiple deliverable arrangements above. Revenue for Evidence.com is deferred at the time of the sale and recognized over the service period. At times the Company subsidizes the cost of Axon devices provided to customers to secure long-term Evidence.com service contracts. In such circumstances, revenue related to the Axon devices recognized at the time of delivery is limited to the amount collected from the customer that is not contingent upon the delivery of future Evidence.com services. The Company recognizes the remaining allocated revenue related to subsidized Axon devices over the remaining period it provides the contracted Evidence.com services. In 2012, the Company introduced a program, the TASER Assurance Program (“TAP”) whereby a customer purchasing a product and joining the program will have the right to trade-in the original product for a new product of the same or like model in the future. Upon joining TAP, customers also receive an extended warranty for the initial products purchased and spare inventory. Under this program the customer generally pays additional annual installments over the contract period, generally three to five years. The Company records consideration received related to the future product purchase as deferred revenue until all revenue recognition criteria are met, which is generally when the new product is delivered. Consideration related to future product purchases is determined at the inception of the arrangement using management’s best estimate of selling price. Management’s estimate is principally based on the current selling price for such products, with due evaluation of the impact of any expected product and pricing changes, which have historically had an immaterial influence on management’s best estimate of selling price. In 2015, The Company introduced the Officer Safety Plan (“OSP”) whereby a customer enters into a five year Evidence.com subscription that includes all of its standard advanced features along with unlimited storage. The OSP also includes a service plan that includes upgrades of (i) the Axon devices every 2.5 years and (ii) a TASER CEW at any point within the contract period. Upon entering into the OSP, customers also receive extended warranties on the Axon and CEW devices upon delivery to cover the contract periods as well as spare inventory units. Under this program the customer generally makes an initial purchase of Axon cameras and related accessories, and CEWs at inception along with annual installments for services and future hardware deliverables over the contract period. The Company records consideration received related to the future purchase as deferred revenue until all revenue recognition criteria are met, which is generally when the products or services are delivered. In 2016, the Company introduced the TASER 60 Plan ("TASER 60") whereby a customer typically enters into a five year CEW installment purchase arrangement. The TASER 60 plan also includes extended warranties on the CEW devices upon delivery covering the contract periods as well as on-site spares, holsters and cartridges. Generally, the Company recognizes revenue for the amount allocated to the CEW at the time of sale for the amount of the customer receivable, net of imputed interest, and the amount allocated to the extended warranty is recognized over five years. Sales tax collected on sales is netted against government remittances and thus, recorded on a net basis. Training and professional service revenues are recorded as the services are provided. Deferred revenue consists of payments received in advance related to products and services for which the criteria for revenue recognition have not yet been met. Deferred revenue that will be recognized during the succeeding twelve month period is recorded as current deferred revenue and the remaining portion is recorded as long-term. Deferred revenue does not include future revenue from multi-year contracts for which no invoice has yet been created. Generally, customers are billed in annual installments. See Note 6 for further disclosures about the Company’s deferred revenue. Sales are typically made on credit, and the Company generally does not require collateral. Management performs ongoing credit evaluations of its customers’ financial condition, and maintains an allowance for estimated potential losses. Uncollectible accounts are charged to expense when deemed uncollectible, and accounts and notes receivable are presented net of an allowance for doubtful accounts. This allowance represents management’s best use of estimates, and is based on judgment after considering a number of factors, including third-party credit reports, actual payment history, cash discounts, customer-specific financial information and broader market and economic trends and conditions. f. Standard Warranties The Company warranties its CEWs, Axon cameras and certain related accessories from manufacturing defects on a limited basis for a period of one year after purchase and, thereafter, will replace any defective unit for a fee. Estimated costs for the standard warranty are charged to cost of products sold and services delivered when revenue is recorded for the related product. Future warranty costs are estimated based on historical data related to returns and warranty costs on a quarterly basis and this rate is applied to current product sales. Historically, reserve amounts have been increased if management becomes aware of a component failure or other issue that could result in larger than anticipated returns from customers. The accrued warranty liability expense is reviewed quarterly to verify that it sufficiently reflects the remaining warranty obligations based on the anticipated expenditures over the balance of the warranty obligation period, and adjustments are made when actual warranty claim experience differs from estimates. Costs related to extended warranties are charged to cost of products sold and services delivered when incurred. The reserve for warranty returns is included in accrued liabilities on the accompanying condensed consolidated balance sheets. Changes in the Company’s estimated product warranty liabilities are as follows (in thousands): Nine Months Ended September 30, 2016 2015 Balance, beginning of period $ 314 $ 675 Utilization of accrual (97 ) (293 ) Warranty expense 531 19 Balance, end of period $ 748 $ 401 g. Fair Value of Financial Instruments The Company uses the fair value framework that prioritizes the inputs to valuation techniques for measuring financial assets and liabilities measured on a recurring basis and for non-financial assets and liabilities when these items are re-measured. Fair value is considered to be the exchange price in an orderly transaction between market participants, to sell an asset or transfer a liability at the measurement date. The hierarchy below lists three levels of fair value based on the extent to which inputs used in measuring fair value are observable in the market. The Company categorizes each of its fair value measurements in one of these three levels based on the lowest level input that is significant to the fair value measurement in its entirety. These levels are: • Level 1 – Valuation techniques in which all significant inputs are unadjusted quoted prices from active markets for assets or liabilities that are identical to the assets or liabilities being measured. • Level 2 – Valuation techniques in which significant inputs include quoted prices from active markets for assets or liabilities that are similar to the assets or liabilities being measured and/or quoted prices for assets or liabilities that are identical or similar to the assets or liabilities being measured from markets that are not active. Also, model-derived valuations in which all significant inputs and significant value drivers are observable in active markets are Level 2 valuation techniques. • Level 3 – Valuation techniques in which one or more significant inputs or significant value drivers are unobservable. Unobservable inputs are valuation technique inputs that reflect the Company's own assumptions about inputs that market participants would use in pricing an asset or liability. The Company has cash equivalents and investments, which at September 30, 2016 and December 31, 2015 were comprised of money market funds, state and municipal obligations, corporate bonds, and certificates of deposits. See additional disclosure regarding the fair value of the Company’s cash equivalents and investments in Note 2. Included in the balance of Other assets as of September 30, 2016 and December 31, 2015 was $3.0 million and $2.2 million , respectively, related to corporate-owned life insurance policies which are used to fund the Company’s deferred compensation plan. The Company determines the fair value of its insurance contracts by obtaining the cash surrender value of the contracts from the issuer, a Level 2 valuation technique. The Company’s financial instruments also include accounts and notes receivable, accounts payable, notes payable and accrued liabilities. Due to the short-term nature of these instruments, their fair values approximate their carrying values on the accompanying condensed consolidated balance sheets. h. Valuation of Goodwill, Intangibles and Long-lived Assets Management evaluates whether events and circumstances have occurred that indicate the remaining estimated useful life of long-lived assets and identifiable intangible assets may warrant revision or that the remaining balance of these assets may not be recoverable. Such circumstances could include, but are not limited to, a change in the product mix, a change in the way products are created, produced or delivered, or a significant change in the way products are branded and marketed. In performing the review for recoverability, management estimates the future undiscounted cash flows expected to result from the use of the assets and their eventual disposition. The amount of the impairment loss, if impairment exists, is calculated based on the excess of the carrying amounts of the assets over their estimated fair value computed using discounted cash flows. The Company recorded losses on disposal of intangible assets of $21,000 and $0.2 million during the nine months ended September 30, 2016 and 2015 , respectively. i. Recently Issued Accounting Guidance In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2014-09, Revenue from Contracts with Customers (Topic 606). ASU 2014-09 requires entities to recognize revenue through the application of a five-step model, which includes identification of the contract, identification of the performance obligations, determination of the transaction price, allocation of the transaction price to the performance obligations and recognition of revenue as the entity satisfies the performance obligations. Subsequently, the FASB issued the following accounting standard updates related to Topic 606, Revenue Contracts with Customers: • ASU No. 2016-08, Revenue from Contracts with Customers (Topic 606): Principal versus Agent Considerations (Reporting Revenue Gross versus Net) in March 2016. ASU 2016-08 does not change the core principle of revenue recognition in Topic 606 but clarifies the implementation guidance on principal versus agent considerations. • ASU No. 2016-10, Revenue from Contracts with Customers (Topic 606): Identifying Performance Obligations and Licensing in April 2016. ASU 2016-10 does not change the core principle of revenue recognition in Topic 606 but clarifies the implementation guidance on identifying performance obligations and the licensing • ASU No. 2016-12, Revenue from Contracts with Customers (Topic 606): Narrow-Scope Improvements and Practical Expedients in May 2016. ASU 2016-12 does not change the core principle of revenue recognition in Topic 606 but clarifies the implementation guidance on a few narrow areas and adds some practical expedients to the guidance. The amendments are effective for annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period. The Company has established an internal implementation team and has engaged a third party advisory firm to assist in the implementation of the new standard. The Company is performing ongoing assessment activities to evaluate the proper method of adoption as well as the impact the adoption of the guidance will have on its consolidated financial statements. In July 2015, the FASB issued ASU 2015-11, Inventory (Topic 330). The amendments require that an entity should measure inventory at the lower of cost and net realizable value. Net realizable value is the estimated prices in the ordinary course of business, less reasonably predictable costs of completion, disposal, and transportation. The amendments are effective for the fiscal year beginning after December 15, 2016, including interim periods within that fiscal year. The amendments should be applied prospectively with earlier application permitted as of the beginning of an interim or annual reporting period. The Company does not expect the adoption of this guidance to have any impact on its financial position, results of operations or cash flows. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) in order to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet for those leases classified as operating leases under previous GAAP. ASU 2016-02 requires that a lessee should recognize a liability to make lease payments (the lease liability) and a right-of-use asset representing its right to use the underlying asset for the lease term on the balance sheet. ASU 2016-02 is effective for the fiscal year beginning after December 15, 2018 (including interim periods within that year) using a modified retrospective approach and early adoption is permitted. The Company is currently in the process of evaluating the impact of adoption of ASU 2016-02 on its consolidated financial statements. In March 2016, the FASB issued ASU 2016-09, Improvements to Employee Share-Based Payment Accounting, which amends Accounting Standards Codification (Topic 718), Compensation – Stock Compensation. ASU 2016-09 simplifies several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. ASU 2016-09 is effective for fiscal years beginning after December 15, 2016, and interim periods within that fiscal year and early adoption is permitted. The Company is currently in the process of evaluating the impact of adoption of the ASU on its consolidated financial statements. In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses ("ASU 2016-13"), which amends ASC 326. The new guidance differs from existing GAAP wherein previous objectives generally delayed recognition of credit losses until the loss was probable. ASU 2016-13 eliminates the probable initial recognition threshold and, instead, reflect an entity’s current estimate of all expected credit losses. The use of forecasted information is intended to incorporate more timely information in the estimate of expected credit loss. ASU 2016-13 is effective for the fiscal year beginning after December 15, 2019, and interim periods within that fiscal year and early adoption is permitted. The Company is currently in the process of evaluating the impact of adoption of ASU 2016-13 on its consolidated financial statements. In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230) Classification of Certain Cash Receipts and Cash Payments. ASU 2016-15 eliminates the diversity in practice related to the classification of certain cash receipts and payments. ASU 2016-15 designates the appropriate cash flow classification, including requirements to allocate certain components of these cash receipts and payments among operating, investing and financing activities. The retrospective transition method, requiring adjustment to all comparative periods presented, is required unless it is impracticable for some of the amendments, in which case those amendments would be prospectively as of the earliest date practicable. The Company is currently assessing the impact that adopting this new accounting standard will have on its consolidated financial statements. j. Out-of-Period Adjustments During the preparation of the condensed consolidated financial statements for the quarter ended March 31, 2016, the Company identified certain transactions that were recorded in the first quarter of fiscal 2016 that should have been recorded in the fourth quarter of 2015. The transactions would have resulted in a reduction in income from operations for the year and quarter ended December 31, 2015 of $0.8 million . Of the $0.8 million , $0.4 million was for variable selling costs related to certain international sales contracts that were recorded and incurred during the fourth quarter, $0.2 million related to a correction of the calculation related to bonus expense that should have been recorded during fiscal 2015, and the remainder was primarily attributable to operating expenses that were incurred but not accrued for as of December 31, 2015. The Company performed various quantitative and qualitative analyses and determined that these errors were not material to the results reported for the year and quarter ended December 31, 2015. The Company also determined that recording these entries as an out-of-period adjustment during the first quarter of 2016 is not expected to be material to the projected results for the full year ended December 31, 2016. k. Reclassification of Prior Year Information Certain prior year amounts have been reclassified with the current year presentation. These reclassifications had no effect on the reported results of operations.

Cash, Cash Equivalents and Inve

Cash, Cash Equivalents and Investments	9 Months Ended
	Sep. 30, 2016
Cash and Cash Equivalents [Abstract]
Cash, Cash Equivalents and Investments	Cash, Cash Equivalents and Investments The following tables summarize the Company's cash, cash equivalents, and held-to-maturity investments at September 30, 2016 and December 31, 2015 (in thousands): As of September 30, 2016 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Cash and Cash Equivalents Short-Term Investments Long-Term Investments Cash $ 45,792 $ — $ — $ 45,792 $ 45,792 $ — $ — Level 1: Money market funds 4,163 — — 4,163 4,163 — — Corporate bonds 36,331 3 (35 ) 36,299 645 29,911 5,775 Subtotal 40,494 3 (35 ) 40,462 4,808 29,911 5,775 Level 2: State and municipal obligations 15,152 1 (8 ) 15,145 — 14,667 485 Certificates of deposit 1,042 — — 1,042 — 1,042 Subtotal 16,194 1 (8 ) 16,187 — 15,709 485 Total $ 102,480 $ 4 $ (43 ) $ 102,441 $ 50,600 $ 45,620 $ 6,260 As of December 31, 2015 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Cash and Cash Equivalents Short-Term Investments Long-Term Investments Cash $ 57,137 $ — $ — $ 57,137 $ 57,137 $ — $ — Level 1: Money market funds 2,389 — — 2,389 2,389 — — Corporate bonds 36,406 — (70 ) 36,336 — 35,677 729 Subtotal 38,795 — (70 ) 38,725 2,389 35,677 729 Level 2: State and municipal obligations 19,002 11 (9 ) 19,004 — 12,000 7,002 Certificates of deposit 3,371 — — 3,371 — 2,577 794 Subtotal 22,373 11 (9 ) 22,375 — 14,577 7,796 Total $ 118,305 $ 11 $ (79 ) $ 118,237 $ 59,526 $ 50,254 $ 8,525 The Company believes the unrealized losses on the Company’s investments are due to interest rate fluctuations. As these investments are either short-term in nature, are expected to be redeemed at par value, and/or because the Company has the ability and intent to hold these investments to maturity, the Company does not consider these investments to be other than temporarily impaired at September 30, 2016 . The following table summarizes the amortized cost and fair value of the short-term and long-term investments held by the Company at September 30, 2016 by contractual maturity (in thousands): Amortized Cost Fair Value Due in less than one year $ 45,620 $ 45,581 Due after one year, through two years 6,260 6,260 Due after two years — — Total short-term and long-term investments $ 51,880 $ 51,841

Inventory

Inventory	9 Months Ended
	Sep. 30, 2016
Inventory Disclosure [Abstract]
Inventory	Inventory Inventories are stated at the lower of cost or market. Cost is determined using the weighted average cost of raw materials which approximates the first-in, first-out (“FIFO”) method and includes allocations of manufacturing labor and overhead. Provisions are made to reduce excess, obsolete or slow-moving inventories to their net realizable value. Inventories consisted of the following at September 30, 2016 and December 31, 2015 (in thousands): 2016 2015 Raw materials $ 12,908 $ 8,748 Work-in-process 6 105 Finished goods 12,589 6,910 Total inventory $ 25,503 $ 15,763

Goodwill and Intangible Assets

Goodwill and Intangible Assets	9 Months Ended
	Sep. 30, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	Goodwill and Intangible Assets The changes in the carrying amount of goodwill for the nine months ended September 30, 2016 were as follows (in thousands): Balance, beginning of period $ 9,596 Purchase accounting adjustments (a) (520 ) Foreign currency translation adjustment (191 ) Balance, end of period $ 8,885 (a) Purchase accounting adjustments related to deferred tax liabilities for MediaSolv and Axon Public Safety U.K. LTD. There was no impact to the condensed consolidated statements of operations for these adjustments as a result of the adoption of ASU 2015-16, which was effective for the Company on January 1, 2016. Intangible assets (other than goodwill) consisted of the following (in thousands): September 30, 2016 December 31, 2015 Useful Life Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Amortized: Domain names 5 years $ 125 $ (125 ) $ — $ 125 $ (120 ) $ 5 Issued patents 4-15 years 1,926 (749 ) 1,177 1,866 (659 ) 1,207 Issued trademarks 3-11 years 628 (301 ) 327 603 (255 ) 348 Customer relationships 4-8 years 945 (206 ) 739 1,035 (93 ) 942 Non-compete agreements 3-4 years 450 (218 ) 232 464 (164 ) 300 Developed technology 7 years 3,470 (699 ) 2,771 3,470 (326 ) 3,144 Total amortized 7,544 (2,298 ) 5,246 7,563 (1,617 ) 5,946 Not amortized: TASER trademark 900 900 900 900 Patents and trademarks pending 970 970 742 742 Total not amortized 1,870 1,870 1,642 1,642 Total intangible assets $ 9,414 $ (2,298 ) $ 7,116 $ 9,205 $ (1,617 ) $ 7,588 Amortization expense relative to intangible assets for the three months ended September 30, 2016 and 2015 was approximately $0.2 million and $0.3 million , respectively, and for the nine months ended September 30, 2016 and 2015 was approximately $0.7 million and $0.5 million , respectively. Estimated amortization for intangible assets with definitive lives for the remaining three months of 2016 , the next five years ended December 31, and thereafter, is as follows (in thousands): 2016 (remaining three months) $ 235 2017 935 2018 922 2019 801 2020 738 2021 731 Thereafter 884 Total $ 5,246

Other Long-Term Assets

Other Long-Term Assets	9 Months Ended
	Sep. 30, 2016
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Other Long-Term Assets	Other Long-Term Assets Other long-term assets consisted of the following at September 30, 2016 and December 31, 2015 (in thousands): 2016 2015 Cash surrender value of corporate-owned life insurance policies (Note 1) $ 3,014 $ 2,180 Prepaid commissions (i) 4,927 3,543 Accounts receivable (ii) 10,359 1,227 Restricted cash (iii) 3,095 — Prepaid expenses, deposits and other 367 246 Total other long-term assets $ 21,762 $ 7,196 (i) Prepaid commissions represent customer acquisition costs to secure long-term contracts. The Company capitalizes incremental and direct costs related to a specific contract and recognizes expense over the term of the contract. (ii) Long-term accounts receivable as of September 30, 2016 and December 31, 2015 consist of balances related to sales made under the Officer Safety and TASER 60 Programs (Note 1e). These balances are collectible over the stated contract period, which is typically five years, and are actively monitored for collectability. (iii) Restricted cash represents sales proceeds related to a long-term contract with a specific customer. These proceeds are held in escrow until certain billing milestones are achieved, and then specified amounts are transferred to the Company's operating accounts.

Deferred Revenue

Deferred Revenue	9 Months Ended
	Sep. 30, 2016
Deferred Revenue Disclosure [Abstract]
Deferred Revenue	Deferred Revenue Deferred revenue consisted of the following (in thousands): September 30, 2016 December 31, 2015 Current Long-Term Total Current Long-Term Total Warranty: TASER Weapons $ 10,304 $ 16,286 $ 26,590 $ 7,278 $ 13,982 $ 21,260 Axon 3,299 2,398 5,697 2,332 2,344 4,676 13,603 18,684 32,287 9,610 16,326 25,936 Hardware: TASER Weapons 1,240 2,441 3,681 952 2,459 3,411 Axon 10,257 10,441 20,698 786 7,382 8,168 11,497 12,882 24,379 1,738 9,841 11,579 Axon Services 15,818 4,402 20,220 9,303 4,023 13,326 Other 366 — 366 200 — 200 Total $ 41,284 $ 35,968 $ 77,252 $ 20,851 $ 30,190 $ 51,041 September 30, 2016 December 31, 2015 Current Long-Term Total Current Long-Term Total TASER Weapons $ 11,910 $ 18,727 $ 30,637 $ 8,430 $ 16,441 $ 24,871 Axon 29,374 17,241 46,615 12,421 13,749 26,170 Total $ 41,284 $ 35,968 $ 77,252 $ 20,851 $ 30,190 $ 51,041

Accrued Liabilities

Accrued Liabilities	9 Months Ended
	Sep. 30, 2016
Payables and Accruals [Abstract]
Accrued Liabilities	Accrued Liabilities Accrued liabilities consisted of the following at September 30, 2016 and December 31, 2015 (in thousands): 2016 2015 Accrued salaries, benefits and bonus $ 5,286 $ 3,637 Accrued professional, consulting and lobbying 1,807 1,098 Accrued warranty expense 748 314 Accrued income and other taxes 2,169 1,215 Other accrued liabilities 6,076 2,379 Accrued liabilities $ 16,086 $ 8,643

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2016
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Deferred Tax Assets Net deferred income tax assets at September 30, 2016 , include capitalized research and development costs, research and development tax credits, non-qualified stock-based compensation expense, deferred warranty revenue, warranty and inventory reserves, accrued vacation, and other items, partially offset by accelerated depreciation expense and intangible amortization that is not tax deductible. The Company’s total net deferred tax assets at September 30, 2016 were $16.8 million . In preparing the Company’s condensed consolidated financial statements, management assesses the likelihood that its deferred tax assets will be realized from future taxable income. In evaluating the Company’s ability to recover its deferred income tax assets, management considers all available positive and negative evidence, including its operating results, ongoing tax planning and forecasts of future taxable income on a jurisdiction by jurisdiction basis. A valuation allowance is established if it is determined that it is more likely than not that some portion or all of the net deferred tax assets will not be realized. Management exercises significant judgment in determining its provisions for income taxes, its deferred tax assets and liabilities, and its future taxable income for purposes of assessing its ability to utilize any future tax benefit from its deferred tax assets. Although management believes that its tax estimates are reasonable, the ultimate tax determination involves significant judgments that could become subject to audit by tax authorities in the ordinary course of business. As of each reporting date, management considers new evidence, both positive and negative, that could impact management’s view with regards to future realization of deferred tax assets. As of September 30, 2016 , the Company continues to demonstrate three-year cumulative pre-tax income in the U.S. federal and Arizona tax jurisdictions; however, the Company's Arizona R&D Tax Credits start to expire in 2018 with a significant tranche with a gross value of $1.2 million expiring if not used by the end of 2019. Under the Company’s new tax structure, it appears that long term investments, which impact short term profits, will likely result in some of the R&D credits expiring before they are utilized. Therefore, management has concluded that it is more likely than not that a portion of the Company’s deferred tax assets will not be realized and has established a valuation allowance. The Company has completed research and development (“R&D”) tax credit studies which identified approximately $12.9 million in tax credits for federal, Arizona and California income tax purposes related to the 2003 through 2016 tax years. Management has made the determination that it is more likely than not that the full benefit of the R&D tax credit will not be sustained on examination and recorded a liability for unrecognized tax benefits of $3.5 million as of September 30, 2016 . In addition, management accrued approximately $0.1 million for estimated uncertain tax positions related to certain state income tax liabilities as of September 30, 2016 . The Company does not expect a significant increase or decrease in the total amount of unrecognized tax benefits within 12 months. Should the total unrecognized tax benefit of $3.6 million be recognized, the Company’s effective tax rate would be favorably impacted. Approximately $1.4 million of the unrecognized tax benefit associated with research and development credits has been netted against the research and development credit deferred tax asset. Effective Tax Rate The Company’s overall effective tax rate for the nine months ended September 30, 2016 , after discrete period adjustments, was 50.1% . Before discrete adjustments the tax rate was 48.3% , which is more than the statutory rate primarily due to the impact of non-deductible losses in certain foreign jurisdictions, state taxes and non-deductible expenses for items such as incentive stock option expense, meals and entertainment and lobbying fees, partially offset by the domestic production activities and research and development tax credit deductions. The effective tax rate was most impacted by the adverse impact from foreign losses for which the Company is not expected to receive a tax benefit. Additionally, the Company's effective tax rate was impacted by an unfavorable $0.4 million return-to-provision adjustment recorded in connection with the finalization of its annual tax return. The Company has completed the full implementation of its new international structure, which began in 2015. In accounting for the income tax effects of this new structure, the Company has recognized income tax expense in the current quarter based on the results it expects for the full year. Actual results could be different, impacting the Company’s income tax expense in future quarters.

Stockholders' Equity

Stockholders' Equity	9 Months Ended
	Sep. 30, 2016
Equity [Abstract]
Stockholders' Equity	Stockholders’ Equity In May 2016, the Company’s stockholders approved a new stock incentive plan authorizing an additional 2.0 million shares, plus remaining available shares under a prior plan for issuance under the new plan. Combined with the legacy stock incentive plans, there are approximately 2.9 million shares available for grant as of September 30, 2016 . Performance-based stock awards The Company has issued performance-based stock options and performance-based restricted stock units ("RSUs"), the vesting of which is contingent upon the achievement of certain performance criteria related to the operating performance of the Company, as well as successful and timely development and market acceptance of future product introductions. In addition, certain of the performance RSUs have additional service-based vesting requirements subsequent to the achievement of the performance criteria. Compensation expense is recognized over the implicit service period (the longer of the period the performance condition is expected to be achieved or the required service period) based on management’s estimate of the probability of the performance criteria being satisfied, adjusted at each balance sheet date. Restricted Stock Units The following table summarizes RSU activity for the nine months ended September 30, 2016 (number of units and aggregate intrinsic value in thousands): Number of Units Weighted Average Grant-Date Fair Value Aggregate Units outstanding, beginning of year 1,139 $ 19.30 Granted 501 17.84 Released (321 ) 15.72 Forfeited (106 ) 21.61 Units outstanding, end of period 1,213 19.45 $ 34,704 Aggregate intrinsic value represents the Company’s closing stock price on the last trading day of the period, which was $28.61 per share, multiplied by the number of RSUs outstanding. As of September 30, 2016 , there was $18.0 million in unrecognized compensation costs related to RSUs under the Company's stock plans. The Company expects to recognize the cost related to the RSUs over a weighted average period of 2.52 years . RSUs are released when vesting requirements are met. During the nine months ended September 30, 2016 , the Company granted approximately 0.1 million performance-based RSUs, which are included in the table above. As of September 30, 2016 , the performance criteria had not been met for any the 0.2 million performance-based RSUs outstanding. Certain of the performance-based RSUs granted in 2016 , 2015 and 2014 contain provisions whereby the amount of RSUs that ultimately vest is dependent upon the level of achievement of performance metrics. The amount of RSUs included in the table above related to such grants is the target level, which is the Company's best estimate of the amount of RSUs that will vest. The maximum additional number of performance-based RSUs that could be earned is 0.2 million , which are not included in the table above. Certain RSUs that vested in the nine months ended September 30, 2016 were net-share settled such that the Company withheld shares with value equivalent to the employees’ minimum statutory obligation for the applicable income and other employment taxes, and remitted the cash to the appropriate taxing authorities. Total shares withheld were approximately 67,400 and had a value of approximately $1.3 million on their respective vesting dates as determined by the Company’s closing stock price. Payments for the employees’ tax obligations are reflected as a financing activity within the statement of cash flows. These net-share settlements had the effect of share repurchases by the Company as they reduced the amount of shares that would have otherwise been issued as a result of the vesting. Stock Option Activity The following table summarizes stock option activity for the nine months ended September 30, 2016 (number of units and aggregate intrinsic value in thousands): Number of Options Weighted Average Exercise Price Weighted Average Remaining Contractual Life (years) Aggregate Options outstanding, beginning of year 1,103 $ 5.37 Granted — — Exercised (88 ) 4.92 Expired / terminated — — Options outstanding, end of period 1,015 5.41 2.50 $ 23,555 Options exercisable, end of period 985 5.43 2.51 22,823 Options expected to vest, end of period 25 4.75 2.23 597 Aggregate intrinsic value represents the difference between the exercise price of the underlying stock option awards and the closing market price of the Company's common stock of $28.61 on September 30, 2016 . The intrinsic value of options exercised for the nine months ended September 30, 2016 and 2015 was $1.8 million and $13.3 million , respectively. Options expected to vest are presented net of forfeitures. As of September 30, 2016 , total options outstanding includes approximately 0.2 million performance-based stock options, of which approximately 30,600 were unvested and 25,000 expected to vest. Stock-based Compensation Expense The estimated fair value of stock-based awards is amortized to expense on a straight-line basis over the service periods. As stock-based compensation expense recognized is based on awards ultimately expected to vest, it is reduced for estimated forfeitures. Forfeitures are estimated at the time of grant and revised, if necessary, in subsequent periods if actual forfeitures differ from those estimates. The Company’s forfeiture rate was calculated based on its historical experience of awards which ultimately vested. The following table summarizes the composition of stock stock-based compensation for the three and nine months ended September 30, 2016 and 2015 (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 Cost of products sold and services delivered $ 77 $ 118 $ 247 $ 276 Sales, general and administrative expenses 1,348 1,123 4,197 2,982 Research and development expenses 791 622 2,298 1,828 Total stock-based compensation $ 2,216 $ 1,863 $ 6,742 $ 5,086 Stock Repurchase Plan In February 2016, the Company announced that TASER’s Board of Directors authorized a stock repurchase program to acquire up to $50.0 million of the Company’s outstanding common stock subject to stock market conditions and corporate considerations. During the three months ended September 30, 2016 , no common shares were purchased under the program. During the nine months ended September 30, 2016 , the Company purchased, under a Rule 10b5-1 plan, approximately 1.8 million common shares for a total cost of approximately $33.8 million , or a weighted average cost of $18.90 per share. The weighted average cost includes the average price paid per share of $18.87 , plus applicable administrative costs for the transaction. During the nine months ended September 30, 2015, the Company purchased approximately 0.3 million common shares for a total cost of approximately $7.6 million , or a weighted average cost of $25.86 per share. As of September 30, 2016 , $16.2 million remains available under the plan for future purchases. The Company suspended its 10b-5 plan, and any future purchases will be discretionary.

Line of Credit

Line of Credit	9 Months Ended
	Sep. 30, 2016
Debt Disclosure [Abstract]
Line of Credit	Line of Credit The Company has a $10.0 million revolving line of credit with a domestic bank. At both September 30, 2016 and December 31, 2015 , there were no borrowings under the line. As of September 30, 2016 , the Company had letters of credit outstanding of approximately $3.9 million under the facility and available borrowing of approximately $6.1 million . The line is secured by substantially all of the assets of the Company, and bears interest at varying rates (currently LIBOR plus 1.5% or Prime less 0.75% ). The line of credit matures on July 31, 2017 , and requires monthly payments of interest only. The Company’s agreement with the bank requires it to comply with certain financial and other covenants including maintenance of a maximum leverage ratio and minimum fixed charge coverage ratio. The leverage ratio (ratio of total liabilities to tangible net worth) can be no greater than 1 :1, and the fixed charge coverage ratio can be no less than 1.25 :1, based upon a trailing twelve -month period. At September 30, 2016 , the Company’s leverage ratio was 0.88 :1 and its fixed charge coverage ratio was 2.23 :1. Accordingly, the Company was in compliance with these covenants.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2016
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Product Litigation The Company is currently named as a defendant in eight lawsuits in which the plaintiffs allege either wrongful death or personal injury in situations in which a TASER CEW was used (or present) by law enforcement officers in connection with arrests or during training exercises. While the facts vary from case to case, the product liability claims are typically based on an alleged product defect resulting in injury or death, usually involving a failure to warn, and the plaintiffs are seeking monetary damages. The information throughout this note is current through the date of these financial statements. As a general rule, it is the Company’s policy not to settle suspect injury or death cases. Exceptions are sometimes made where the settlement is strategically beneficial to the Company. Also, on occasion, the Company’s insurance company has settled such lawsuits over the Company’s objection where the risk is over the Company’s liability insurance deductibles. Due to the confidentiality of the Company's litigation strategy and the confidentiality agreements that are executed in the event of a settlement, the Company does not identify or comment on which specific lawsuits have been settled or the amount of any settlement. In 2009, the Company implemented new risk management strategies, including revisions to product warnings and training to better protect both the Company and its customers from litigation based on ‘failure to warn’ theories - which comprise the vast majority of the cases against the Company. These risk management strategies have been highly effective in reducing the rate and exposure from litigation post-2009. From the third quarter of 2011 to the third quarter of 2016 , product liability cases have been reduced from 55 active to eight active cases. Management believes that pre-2009 cases have a different risk profile than cases which have occurred since the risk management procedures were introduced in 2009. Therefore, the Company necessarily treats certain pre-2009 cases as exceptions to the Company’s general no settlement policy in order to reduce caseload, legal costs and liability exposure. The Company intends to continue its successful practice of aggressively defending and generally not settling litigation except in very limited and unusual circumstances as described above. With respect to each of the pending lawsuits, the following table lists the name of plaintiff, the date the Company was served with process, the jurisdiction in which the case is pending, the type of claim and the status of the matter. Plaintiff Month Served Jurisdiction Claim Type Status Derbyshire Nov-09 Ontario, Canada Superior Court of Justice Officer Injury Discovery Phase Doan Apr-10 The Queen's Bench, Alberta, Red Deer Judicial Dist. Wrongful Death Discovery Phase Shymko Dec-10 The Queen's Bench, Winnipeg Centre, Manitoba Wrongful Death Pleading Phase Ramsey Jan-12 12th Judicial Circuit Court, Broward County, FL Wrongful Death Discovery Phase Firman Apr-12 Ontario, Canada Superior Court of Justice Wrongful Death Pleading Phase Schrock Sep-14 San Bernardino County Superior Court, CA Wrongful Death Motion of Summary Judgment Granted on all claims except negligent design and manufacture, subject to repleading by Plaintiff. Plaintiff filed an amended complaint for negligent design claims as well as a Petition for Writ of Mandate or Prohibition Petition from the Court; which writ was summarily denied. Bennett Sep-15 11th Judicial Circuit Court, Miami-Dade County, FL Wrongful Death Discovery Phase Suarez Sep-16 US District Court, Southern District of Florida Wrongful Death Pleading Phase There are no product litigation matters in which the Company is involved that are currently on appeal. The following cases were dismissed or judgment entered during the third quarter of 2016 and through the date of these financial statements. Plaintiff Month Served Jurisdiction Claim Type Status Thompson Mar-10 11th Judicial Circuit Court, Miami-Dade County, FL Wrongful Death Dismissed Hernandez/llach Sep-15 11th Judicial Circuit Court, Miami-Dade County, FL Wrongful Death Dismissed Williams Aug-16 US District Court for the Northern District Georgia Wrongful Death Dismissed The claims, and in some instances the defense, of each of these lawsuits have been submitted to the Company’s insurance carriers that maintained insurance coverage during the applicable periods. The Company continues to maintain product liability insurance coverage with varying limits and deductibles. The following table provides information regarding the Company’s product liability insurance. Remaining insurance coverage is based on information received from the Company’s insurance provider (in millions). Policy Year Policy Start Date Policy End Date Insurance Coverage Deductible Amount Defense Costs Covered Remaining Insurance Coverage Active Cases and Cases on Appeal 2009 12/15/2008 12/15/2009 10.0 1.0 N 10.0 Derbyshire 2010 12/15/2009 12/15/2010 10.0 1.0 N 10.0 Shymko, Doan 2011 12/15/2010 12/15/2011 10.0 1.0 N 10.0 n/a Jan-Jun 2012 12/15/2011 6/25/2012 7.0 1.0 N 7.0 Ramsey, Firman Jul-Dec 2012 6/25/2012 12/15/2012 12.0 1.0 N 12.0 n/a 2013 12/15/2012 12/15/2013 12.0 1.0 N 12.0 n/a 2014 12/15/2013 12/15/2014 11.0 4.0 N 11.0 Schrock 2015 12/15/2014 12/15/2015 10.0 5.0 N 10.0 Bennett 2016 12/15/2015 12/15/2016 10.0 5.0 N 10.0 Suarez Other Litigation In November, 2015 the Company filed a complaint against Phazzer Electronics Inc. and Sang Min International Co. Ltd. for patent infringement, trademark infringement and false advertising. Defendant Phazzer has filed a motion to dismiss as well as an ex parte reexamination request with the United States Patent and Trademark Officer of TASER’s US Patent No. 7,234,262, which request was granted. This litigation is in the motion/discovery phase. In February, 2016 the Company was served with a first amended complaint filed by Digital Ally in the Federal District Court for the District of Kansas alleging patent infringement, commercial bribery, contracts, combinations and conspiracies in restraint of trade and unfair or anti-competitive acts and practices. In March 2016, the Company was served with a second amended complaint with similar allegations. The second amended complaint seeks a judgment of infringement, monetary damages, a permanent injunction, punitive damages and attorneys’ fees and costs. The Company believes the second amended complaint is frivolous and the Company will vigorously defend this litigation. The Company has filed a motion to dismiss the claims involving commercial bribery, contracts, combinations and conspiracies in restraint of trade and unfair or anti-competitive acts and practices. This litigation is in the discovery phase. In April, 2016 the Company was served with a notice of arbitration claim filed by Antoine di Zazzo, the Company’s former distributor in France, for commissions allegedly owed Mr. di Zazzo. The arbitration claim was filed with the International Court of Arbitration of the International Chamber of Commerce in Paris, France, and the amount that is claimed in controversy is approximately $0.6 million . The Company’s records reflect that all commissions that were due Mr. di Zazzo under his contract were paid or offered to him and the Company will vigorously defend this arbitration claim. General From time to time, the Company is notified that it may be a party to a lawsuit or that a claim is being made against it. It is the Company’s policy to not disclose the specifics of any claim or threatened lawsuit until the summons and complaint are actually served on the Company. After carefully assessing the claim, and assuming the Company determines that it is not at fault or it disagrees with the damages or relief demanded, the Company vigorously defends any lawsuit filed against the Company. In certain legal matters, the Company records a liability when losses are deemed probable and reasonably estimable. In evaluating matters for accrual and disclosure purposes, the Company takes into consideration factors such as our historical experience with matters of a similar nature, the specific facts and circumstances asserted, the likelihood of our prevailing, the availability of insurance, and the severity of any potential loss. The Company reevaluates and updates accruals as matters progress over time. Based on the Company's assessment of outstanding litigation and claims as of September 30, 2016 , the Company has determined that it is not reasonably possible that these lawsuits will individually, or in the aggregate, materially affect its results of operations, financial condition or cash flows. However, the outcome of any litigation is inherently uncertain and there can be no assurance that any expense, liability or damages that may ultimately result from the resolution of these matters will be covered by its insurance or will not be in excess of amounts recognized or provided by insurance coverage and will not have a material adverse effect on our operating results, financial condition or cash flows. Off-Balance Sheet Arrangements Under certain circumstances, the Company uses letters of credit and surety bonds to guarantee its performance under various contracts, principally in connection with the installation and integration of its Axon cameras and related technologies. Certain of the Company's letters of credit contracts and surety bonds have stated expiration dates with others being released as the contractual performance terms are completed. At September 30, 2016 , the Company had outstanding letters of credit of approximately $3.9 million . Of that amount, $2.7 million is expected to expire in May 2017 and $1.2 million is expected to expire in February 2017. Additionally, the Company had approximately $5.7 million of outstanding surety bonds at September 30, 2016 , with $0.4 million expiring in 2018, $2.4 million expiring in 2020, and the remaining $2.9 million expiring in 2021 and thereafter.

Related Party Transactions

Related Party Transactions	9 Months Ended
	Sep. 30, 2016
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions The Company engages Dr. Mark Kroll, a member of the Board of Directors, to provide consulting services. The expenses related to these services were approximately $14,000 and $44,000 for the three months ended September 30, 2016 and 2015 , respectively, and $111,000 and $156,000 for the nine months ended September 30, 2016 and 2015 , respectively. At September 30, 2016 and December 31, 2015 , the Company had liabilities of approximately $3,000 and $31,000 , respectively, related to these services. The Company subscribes to a mobile collaboration software suite co-founded and managed by Bret Taylor, a member of the Company's Board of Directors. The cost to license this software is approximately $30,000 per quarter, and as of September 30, 2016 and December 31, 2015 the Company had $80,800 and $36,000 , respectively, of prepaid costs related to the license subscription. In connection with the acquisition of Tactical Safety Responses Limited (Note 15), the Company assumed a long-term non-cancellable operating lease for office space with the former owners, one of whom is an employee of the Company. The lease has a remaining contractual term of approximately five years and requires annual rental payments of approximately $25,000 .

Employee Benefit Plans

Employee Benefit Plans	9 Months Ended
	Sep. 30, 2016
Compensation and Retirement Disclosure [Abstract]
Employee Benefit Plans	Employee Benefit Plans The Company has a defined contribution profit sharing 401 (k) plan for eligible employees, which is qualified under Sections 401 (a) and 401 (k) of the Internal Revenue Code of 1986, as amended. Employees are entitled to make tax-deferred contributions of up to the maximum allowed by law of their eligible compensation. The Company also has a non-qualified deferred compensation plan for certain executives, key employees and non-employee directors through which participants may elect to postpone the receipt and taxation of a portion of their compensation, including stock-based compensation, received from the Company. The non-qualified deferred compensation plan allows eligible participants to defer up to 80% of their base salary and up to 100% of other types of compensation. The plan also allows for (i) matching and discretionary employer contributions and (ii) the deferral of vested RSU awards. Employee deferrals are deemed 100% vested upon contribution. Distributions from the plan are made upon retirement, death, separation of service, specified date or upon the occurrence of an unforeseeable emergency. Distributions can be paid in a variety of forms from lump sum to installments over a period of years. Participants in the plan are entitled to select from a wide variety of investments available under the plan and are allocated gains or losses based upon the performance of the investments selected by the participant. All gains or losses are allocated fully to plan participants and the Company does not guarantee a rate of return on deferred balances. Assets related to this plan consist of corporate-owned life insurance contracts and are included in other assets in the condensed consolidated balance sheets. Participants have no rights or claims with respect to any plan assets and any such assets are subject to the claims of the Company’s general creditors. Contributions to the plans are made by both the employee and the Company. Company contributions to the 401(k) plan are based on the level of employee contributions and are immediately vested. The Company’s matching contributions to the 401(k) plan for the three months ended September 30, 2016 and 2015 , were approximately $0.4 million and $0.3 million , respectively, and for the nine months ended September 30, 2016 and 2015 , were approximately $1.2 million and $0.9 million , respectively. The Company expects to make contributions to the non-qualified deferred compensation plan related to the three months ended September 30, 2016 , of approximately $8,000 . Future matching or profit sharing contributions to the plans are at the Company’s sole discretion.

Segment Data

Segment Data	9 Months Ended
	Sep. 30, 2016
Segment Reporting [Abstract]
Segment Data	Segment Data The Company’s operations are comprised of two reportable segments: the manufacture and sale of CEWs, accessories and other products and services (the “TASER Weapons” segment); and the video business, which includes the TASER Cam, Axon products, Evidence.com, and MediaSolv (the “Axon” segment). The Company includes only revenues and costs attributable to the Axon segment in that segment. Included in Axon segment costs are: costs of sales for both products and services, overhead allocation based on direct labor, selling expense for the Axon sales team, Axon product management expenses, trade shows and related expenses, and research and development for products included in the Axon segment. All other costs are included in the TASER Weapons segment. The CODM does not review assets by segment as part of the financial information provided; therefore, only limited asset information is provided in the following tables. Information relative to the Company’s reportable segments is as follows (in thousands): Three Months Ended September 30, 2016 Three Months Ended September 30, 2015 TASER Weapons Axon Total TASER Weapons Axon Total Product sales $ 52,938 $ 10,266 $ 63,204 $ 39,520 $ 7,745 $ 47,265 Service revenue — 8,678 8,678 — 3,111 3,111 Net sales 52,938 18,944 71,882 39,520 10,856 50,376 Cost of products sold 14,973 8,691 23,664 12,445 5,829 18,274 Cost of services delivered — 1,653 1,653 — 1,034 1,034 Gross margin 37,965 8,600 46,565 27,075 3,993 31,068 Sales, general and administrative 16,439 11,682 28,121 11,941 5,893 17,834 Research and development 1,408 5,950 7,358 1,151 5,377 6,528 Income (loss) from operations $ 20,118 $ (9,032 ) $ 11,086 $ 13,983 $ (7,277 ) $ 6,706 Purchase of property and equipment $ 1,064 $ 307 $ 1,371 $ 1,900 $ 169 $ 2,069 Purchase of intangible assets 77 77 154 114 87 201 Purchase of property and equipment and intangible assets in connection with business acquisition — — — 1,453 1,452 3,005 Depreciation and amortization 537 364 901 603 345 948 Nine Months Ended September 30, 2016 Nine Months Ended September 30, 2015 TASER Axon Total TASER Axon Total Product sales $ 144,307 $ 23,438 $ 167,745 $ 115,686 $ 18,177 $ 133,863 Service revenue — 18,423 18,423 — 7,988 7,988 Net sales 144,307 41,861 186,168 115,686 26,165 141,851 Cost of products sold 43,998 17,174 61,172 34,805 12,692 47,497 Cost of services delivered — 4,230 4,230 — 2,695 2,695 Gross margin 100,309 20,457 120,766 80,881 10,778 91,659 Sales, general and administrative 46,395 30,938 77,333 33,469 14,373 47,842 Research and development 3,773 17,222 20,995 3,418 13,574 16,992 Income (loss) from operations $ 50,141 $ (27,703 ) $ 22,438 $ 43,994 $ (17,169 ) $ 26,825 Purchase of property and equipment $ 2,729 $ 606 $ 3,335 $ 2,345 $ 1,404 $ 3,839 Purchase of intangible assets 190 149 339 195 207 402 Purchase of property and equipment and intangible assets in connection with business acquisition — — — 1,453 11,146 12,599 Depreciation and amortization 1,669 1,075 2,744 1,689 621 2,310

Business Acquisitions

Business Acquisitions	9 Months Ended
	Sep. 30, 2016
Business Combinations [Abstract]
Business Acquisitions	Business Acquisitions MediaSolv Solutions Corporation On May 5, 2015, the Company acquired all of the outstanding capital stock of MediaSolv Solutions Corporation, a Delaware corporation for a total purchase price of $8.8 million , net of $0.1 million of cash acquired. MediaSolv primarily provides solutions for interview room video, closed-circuit television ("CCTV") and on-premise digital evidence management. These products connect with the Company's Axon on-officer cameras and, in some cases, its Evidence.com cloud platform, further enabling law enforcement to unify existing silos of digital media and evidence into a seamless workflow from capture to the courtroom. The Company believes the acquisition will continue to allow the Company to leverage MediaSolv’s existing network and relationships to further strengthen its position in the market. The purchase price consisted primarily of cash, net of cash acquired and working capital adjustments, of $7.8 million and contingent consideration of $1.0 million representing potential earn-outs to former stockholders based on predetermined future financial metrics. The Company also agreed to additional earn-out provisions and compensation adjustments totaling approximately $4.0 million based, in part, on predefined future financial metrics. The additional earn-outs were not included as part of the purchase price and will be expensed as compensation in the period earned. During the first quarter of 2016, the $1.0 million of earn-outs to former stockholders were earned in full and were paid during the second quarter of 2016. During the three and nine months ended September 30, 2016 , the Company recorded $0.2 million and $1.2 million , respectively, of earn-outs that were recorded as commission expense, and as of September 30, 2016 , $0.2 million of earn-outs were recorded as accrued liabilities within the accompanying condensed consolidated financial statements. The major classes of assets and liabilities to which the Company allocated the purchase price were as follows (in thousands): Accounts receivable and other current assets $ 590 Inventory 35 Property and equipment 53 Intangible assets 4,145 Goodwill 5,496 Accounts payable and accrued liabilities (697 ) Deferred revenue (111 ) Deferred income tax liabilities, net (688 ) Total purchase price $ 8,823 The Company has assigned the goodwill to the Axon segment. Other identifiable definite lived intangible assets were assigned a total weighted average amortization period of 6.5 years . MediaSolv has been included in the Company's consolidated results of operations subsequent to the acquisition date. Pro forma results of operations for MediaSolv have not been presented because they are not material to the consolidated results of operations. In connection with the acquisition, the Company incurred and expensed costs of approximately $0.2 million , which included legal, accounting and other third-party expenses related to the transaction. Tactical Safety Responses Limited On July 16, 2015, TASER International B.V., a wholly owned subsidiary of the Company, acquired all of the outstanding capital stock of Tactical Safety Responses Limited ("TSR"), a United Kingdom ("UK") corporation. TSR was the Company's licensed distributor of TASER CEWs and Axon cameras and related accessories in the UK. The acquired entity operates under the name Axon Public Safety UK. The acquisition is intended to help expand the Company's growth across the UK by growing its in-country sales and support team. The total purchase was $3.3 million consisting of $4.0 million cash at close, net of $0.7 million of cash acquired. The Company also agreed to additional amounts in the form of earn-outs, subject to the achievement of predefined performance metrics. The earn-outs were not included as part of the purchase price and will be expensed as compensation in the period earned. During the three and nine months ended September 30, 2016 , $0.1 million was recorded as commissions expense under these earn-out provisions. The major classes of assets and liabilities to which the Company has allocated the purchase price are as follows (in thousands): Accounts receivable $ 726 Inventory 497 Property and equipment 583 Other Assets 20 Intangible assets 881 Goodwill 1,441 Accounts payable and accrued liabilities (207 ) Notes payable (169 ) Income tax liabilities (438 ) Total purchase price $ 3,334 The Company has assigned the goodwill to the consolidated entity. Other identifiable definite lived intangible assets were assigned a total weighted average amortization period of 7.0 years. TSR has been included in the Company's consolidated results of operations subsequent to the acquisition date. Pro forma results of operations for TSR have not been presented because they are not material to the consolidated results of operations. In connection with the acquisition, the Company incurred and expensed costs of approximately $0.1 million , which included legal, accounting and other third-party expenses related to the transaction.

Organization and Summary of S21

Organization and Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation and Use of Estimates	Basis of Presentation and Use of Estimates These unaudited condensed consolidated financial statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission. Certain information related to the Company’s organization, significant accounting policies and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States (“US GAAP”) has been condensed or omitted. The accounting policies followed in the preparation of these unaudited condensed consolidated financial statements are consistent with those followed in the Company’s annual consolidated financial statements for the year ended December 31, 2015 , as filed on Form 10-K. In the opinion of management, these unaudited condensed consolidated financial statements contain all material adjustments, consisting only of normal recurring adjustments, necessary to fairly state the Company’s financial position, results of operations and cash flows for the periods presented and the presentations and disclosures herein are adequate when read in conjunction with the Company’s Form 10-K for the year ended December 31, 2015 . The results of operations for the three and nine months ended September 30, 2016 and 2015 are not necessarily indicative of the results to be expected for the full year (or any other period). Significant estimates and assumptions in these unaudited condensed consolidated financial statements include: • product warranty reserves, • inventory valuation, • revenue recognition allocated in multiple-deliverable contracts or arrangements, • valuation of goodwill, intangibles and long-lived assets, • recognition, measurement and valuation of current and deferred income taxes, • fair value of stock awards issued, the estimated vesting period for performance-based stock awards and forfeiture rates, and • recognition and measurement of contingencies and accrued litigation expense. Actual results could differ materially from those estimates.
Segment Information	Segment Information The Company is comprised of two reportable segments: the manufacture and sale of CEWs, accessories and other products and services (the “TASER Weapons” segment); and the video business which includes the TASER Cam, Axon cameras and related accessories, Evidence.com and MediaSolv (the “Axon” segment). Reportable segments are determined based on discrete financial information reviewed by the Company’s Chief Executive Officer who is the Chief Operating Decision Maker (the “CODM”) for the Company. The Company organizes and reviews operations based on products and services, and currently there are no operating segments that are aggregated. The Company performs an annual analysis of its reportable segments. Additional information related to the Company’s business segments is summarized in Note 14.
Geographic Information and Major Customers	Sales to customers outside of the U.S. are typically denominated in U.S. dollars, and are attributed to each country based on the shipping address of the distributor or customer.
Income per Common Share	Income per Common Share Basic income per common share is computed by dividing net income by the weighted average number of common shares outstanding during the periods presented.
Revenue Recognition, Deferred Revenue and Accounts and Notes Receivable	Revenue Recognition, Deferred Revenue and Accounts and Notes Receivable The Company derives revenue from two primary sources: (1) the sale of physical products, including CEWs, Axon cameras, corresponding extended warranties, and related accessories such as E-docks, cartridges and batteries, among others, and (2) subscription to the Company's Evidence.com software as a service ("SaaS") (including data storage fees and other ancillary services), which includes varying levels of support. To a lesser extent, the Company also recognizes training and other professional services revenue. Revenue is recognized when persuasive evidence of an arrangement exists, delivery has occurred or services have been rendered, title has transferred, the price is fixed and collectability is reasonably assured. Contractual arrangements may contain explicit customer acceptance provisions, and under such arrangements, the Company defers recognition of revenue until formal customer acceptance is received. Extended warranty revenue, SaaS revenue and related data storage revenue are recognized ratably over the term of the contract beginning on the commencement date of each contract. Revenue arrangements with multiple deliverables are divided into separate units and revenue is allocated using the relative selling price method based upon vendor-specific objective evidence of selling price or third-party evidence of the selling prices if vendor-specific objective evidence of selling prices does not exist. If neither vendor-specific objective evidence nor third-party evidence exists, management uses its best estimate of selling price. The majority of the Company’s allocations of arrangement consideration under multiple element arrangements are performed using vendor-specific objective evidence by utilizing prices charged to customers for deliverables when sold separately. The Company’s multiple element arrangements may include future CEWs and/or Axon devices to be delivered at defined points within a multi-year contract, and in those arrangements, the Company allocates total arrangement consideration over the life of the multi-year contract to future deliverables using management’s best estimate of selling price. The Company has not utilized third party evidence of selling price. The Company offers the right to purchase extended warranties that include additional services and coverage beyond the standard limited warranty for certain products. Revenue for extended warranty purchases is deferred at the time of sale and recognized over the warranty period commencing on the date of sale. Extended warranties range from one to five years. Evidence.com and Axon cameras and related accessories have stand-alone value to the customer and are sometimes sold separately, but in most instances are sold together. In these instances, customers typically purchase and pay for the equipment and one year of Evidence.com in advance. Additional years of service are generally billed annually over a specified service term, which has typically ranged from one to five years. Generally, the Company recognizes revenue for the Axon equipment at the time of the sale consistent with the discussion of multiple deliverable arrangements above. Revenue for Evidence.com is deferred at the time of the sale and recognized over the service period. At times the Company subsidizes the cost of Axon devices provided to customers to secure long-term Evidence.com service contracts. In such circumstances, revenue related to the Axon devices recognized at the time of delivery is limited to the amount collected from the customer that is not contingent upon the delivery of future Evidence.com services. The Company recognizes the remaining allocated revenue related to subsidized Axon devices over the remaining period it provides the contracted Evidence.com services. In 2012, the Company introduced a program, the TASER Assurance Program (“TAP”) whereby a customer purchasing a product and joining the program will have the right to trade-in the original product for a new product of the same or like model in the future. Upon joining TAP, customers also receive an extended warranty for the initial products purchased and spare inventory. Under this program the customer generally pays additional annual installments over the contract period, generally three to five years. The Company records consideration received related to the future product purchase as deferred revenue until all revenue recognition criteria are met, which is generally when the new product is delivered. Consideration related to future product purchases is determined at the inception of the arrangement using management’s best estimate of selling price. Management’s estimate is principally based on the current selling price for such products, with due evaluation of the impact of any expected product and pricing changes, which have historically had an immaterial influence on management’s best estimate of selling price. In 2015, The Company introduced the Officer Safety Plan (“OSP”) whereby a customer enters into a five year Evidence.com subscription that includes all of its standard advanced features along with unlimited storage. The OSP also includes a service plan that includes upgrades of (i) the Axon devices every 2.5 years and (ii) a TASER CEW at any point within the contract period. Upon entering into the OSP, customers also receive extended warranties on the Axon and CEW devices upon delivery to cover the contract periods as well as spare inventory units. Under this program the customer generally makes an initial purchase of Axon cameras and related accessories, and CEWs at inception along with annual installments for services and future hardware deliverables over the contract period. The Company records consideration received related to the future purchase as deferred revenue until all revenue recognition criteria are met, which is generally when the products or services are delivered. In 2016, the Company introduced the TASER 60 Plan ("TASER 60") whereby a customer typically enters into a five year CEW installment purchase arrangement. The TASER 60 plan also includes extended warranties on the CEW devices upon delivery covering the contract periods as well as on-site spares, holsters and cartridges. Generally, the Company recognizes revenue for the amount allocated to the CEW at the time of sale for the amount of the customer receivable, net of imputed interest, and the amount allocated to the extended warranty is recognized over five years. Sales tax collected on sales is netted against government remittances and thus, recorded on a net basis. Training and professional service revenues are recorded as the services are provided. Deferred revenue consists of payments received in advance related to products and services for which the criteria for revenue recognition have not yet been met. Deferred revenue that will be recognized during the succeeding twelve month period is recorded as current deferred revenue and the remaining portion is recorded as long-term. Deferred revenue does not include future revenue from multi-year contracts for which no invoice has yet been created. Generally, customers are billed in annual installments. See Note 6 for further disclosures about the Company’s deferred revenue. Sales are typically made on credit, and the Company generally does not require collateral. Management performs ongoing credit evaluations of its customers’ financial condition, and maintains an allowance for estimated potential losses. Uncollectible accounts are charged to expense when deemed uncollectible, and accounts and notes receivable are presented net of an allowance for doubtful accounts. This allowance represents management’s best use of estimates, and is based on judgment after considering a number of factors, including third-party credit reports, actual payment history, cash discounts, customer-specific financial information and broader market and economic trends and conditions.
Standard Warranties	Standard Warranties The Company warranties its CEWs, Axon cameras and certain related accessories from manufacturing defects on a limited basis for a period of one year after purchase and, thereafter, will replace any defective unit for a fee. Estimated costs for the standard warranty are charged to cost of products sold and services delivered when revenue is recorded for the related product. Future warranty costs are estimated based on historical data related to returns and warranty costs on a quarterly basis and this rate is applied to current product sales. Historically, reserve amounts have been increased if management becomes aware of a component failure or other issue that could result in larger than anticipated returns from customers. The accrued warranty liability expense is reviewed quarterly to verify that it sufficiently reflects the remaining warranty obligations based on the anticipated expenditures over the balance of the warranty obligation period, and adjustments are made when actual warranty claim experience differs from estimates. Costs related to extended warranties are charged to cost of products sold and services delivered when incurred. The reserve for warranty returns is included in accrued liabilities on the accompanying condensed consolidated balance sheets.
Fair Value of Financial Instruments	Fair Value of Financial Instruments The Company uses the fair value framework that prioritizes the inputs to valuation techniques for measuring financial assets and liabilities measured on a recurring basis and for non-financial assets and liabilities when these items are re-measured. Fair value is considered to be the exchange price in an orderly transaction between market participants, to sell an asset or transfer a liability at the measurement date. The hierarchy below lists three levels of fair value based on the extent to which inputs used in measuring fair value are observable in the market. The Company categorizes each of its fair value measurements in one of these three levels based on the lowest level input that is significant to the fair value measurement in its entirety. These levels are: • Level 1 – Valuation techniques in which all significant inputs are unadjusted quoted prices from active markets for assets or liabilities that are identical to the assets or liabilities being measured. • Level 2 – Valuation techniques in which significant inputs include quoted prices from active markets for assets or liabilities that are similar to the assets or liabilities being measured and/or quoted prices for assets or liabilities that are identical or similar to the assets or liabilities being measured from markets that are not active. Also, model-derived valuations in which all significant inputs and significant value drivers are observable in active markets are Level 2 valuation techniques. • Level 3 – Valuation techniques in which one or more significant inputs or significant value drivers are unobservable. Unobservable inputs are valuation technique inputs that reflect the Company's own assumptions about inputs that market participants would use in pricing an asset or liability. The Company has cash equivalents and investments, which at September 30, 2016 and December 31, 2015 were comprised of money market funds, state and municipal obligations, corporate bonds, and certificates of deposits. See additional disclosure regarding the fair value of the Company’s cash equivalents and investments in Note 2. Included in the balance of Other assets as of September 30, 2016 and December 31, 2015 was $3.0 million and $2.2 million , respectively, related to corporate-owned life insurance policies which are used to fund the Company’s deferred compensation plan. The Company determines the fair value of its insurance contracts by obtaining the cash surrender value of the contracts from the issuer, a Level 2 valuation technique. The Company’s financial instruments also include accounts and notes receivable, accounts payable, notes payable and accrued liabilities. Due to the short-term nature of these instruments, their fair values approximate their carrying values on the accompanying condensed consolidated balance sheets.
Valuation of Goodwill, Intangibles and Long-lived Assets	Valuation of Goodwill, Intangibles and Long-lived Assets Management evaluates whether events and circumstances have occurred that indicate the remaining estimated useful life of long-lived assets and identifiable intangible assets may warrant revision or that the remaining balance of these assets may not be recoverable. Such circumstances could include, but are not limited to, a change in the product mix, a change in the way products are created, produced or delivered, or a significant change in the way products are branded and marketed. In performing the review for recoverability, management estimates the future undiscounted cash flows expected to result from the use of the assets and their eventual disposition. The amount of the impairment loss, if impairment exists, is calculated based on the excess of the carrying amounts of the assets over their estimated fair value computed using discounted cash flows.
Recently Issued Accounting Guidance	Recently Issued Accounting Guidance In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2014-09, Revenue from Contracts with Customers (Topic 606). ASU 2014-09 requires entities to recognize revenue through the application of a five-step model, which includes identification of the contract, identification of the performance obligations, determination of the transaction price, allocation of the transaction price to the performance obligations and recognition of revenue as the entity satisfies the performance obligations. Subsequently, the FASB issued the following accounting standard updates related to Topic 606, Revenue Contracts with Customers: • ASU No. 2016-08, Revenue from Contracts with Customers (Topic 606): Principal versus Agent Considerations (Reporting Revenue Gross versus Net) in March 2016. ASU 2016-08 does not change the core principle of revenue recognition in Topic 606 but clarifies the implementation guidance on principal versus agent considerations. • ASU No. 2016-10, Revenue from Contracts with Customers (Topic 606): Identifying Performance Obligations and Licensing in April 2016. ASU 2016-10 does not change the core principle of revenue recognition in Topic 606 but clarifies the implementation guidance on identifying performance obligations and the licensing • ASU No. 2016-12, Revenue from Contracts with Customers (Topic 606): Narrow-Scope Improvements and Practical Expedients in May 2016. ASU 2016-12 does not change the core principle of revenue recognition in Topic 606 but clarifies the implementation guidance on a few narrow areas and adds some practical expedients to the guidance. The amendments are effective for annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period. The Company has established an internal implementation team and has engaged a third party advisory firm to assist in the implementation of the new standard. The Company is performing ongoing assessment activities to evaluate the proper method of adoption as well as the impact the adoption of the guidance will have on its consolidated financial statements. In July 2015, the FASB issued ASU 2015-11, Inventory (Topic 330). The amendments require that an entity should measure inventory at the lower of cost and net realizable value. Net realizable value is the estimated prices in the ordinary course of business, less reasonably predictable costs of completion, disposal, and transportation. The amendments are effective for the fiscal year beginning after December 15, 2016, including interim periods within that fiscal year. The amendments should be applied prospectively with earlier application permitted as of the beginning of an interim or annual reporting period. The Company does not expect the adoption of this guidance to have any impact on its financial position, results of operations or cash flows. In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842) in order to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet for those leases classified as operating leases under previous GAAP. ASU 2016-02 requires that a lessee should recognize a liability to make lease payments (the lease liability) and a right-of-use asset representing its right to use the underlying asset for the lease term on the balance sheet. ASU 2016-02 is effective for the fiscal year beginning after December 15, 2018 (including interim periods within that year) using a modified retrospective approach and early adoption is permitted. The Company is currently in the process of evaluating the impact of adoption of ASU 2016-02 on its consolidated financial statements. In March 2016, the FASB issued ASU 2016-09, Improvements to Employee Share-Based Payment Accounting, which amends Accounting Standards Codification (Topic 718), Compensation – Stock Compensation. ASU 2016-09 simplifies several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. ASU 2016-09 is effective for fiscal years beginning after December 15, 2016, and interim periods within that fiscal year and early adoption is permitted. The Company is currently in the process of evaluating the impact of adoption of the ASU on its consolidated financial statements. In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses ("ASU 2016-13"), which amends ASC 326. The new guidance differs from existing GAAP wherein previous objectives generally delayed recognition of credit losses until the loss was probable. ASU 2016-13 eliminates the probable initial recognition threshold and, instead, reflect an entity’s current estimate of all expected credit losses. The use of forecasted information is intended to incorporate more timely information in the estimate of expected credit loss. ASU 2016-13 is effective for the fiscal year beginning after December 15, 2019, and interim periods within that fiscal year and early adoption is permitted. The Company is currently in the process of evaluating the impact of adoption of ASU 2016-13 on its consolidated financial statements. In August 2016, the FASB issued ASU 2016-15, Statement of Cash Flows (Topic 230) Classification of Certain Cash Receipts and Cash Payments. ASU 2016-15 eliminates the diversity in practice related to the classification of certain cash receipts and payments. ASU 2016-15 designates the appropriate cash flow classification, including requirements to allocate certain components of these cash receipts and payments among operating, investing and financing activities. The retrospective transition method, requiring adjustment to all comparative periods presented, is required unless it is impracticable for some of the amendments, in which case those amendments would be prospectively as of the earliest date practicable. The Company is currently assessing the impact that adopting this new accounting standard will have on its consolidated financial statements.

Organization and Summary of S22

Organization and Summary of Significant Accounting Policies (Tables)	9 Months Ended
	Sep. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Net Sales by Geographic Area	For the three and nine months ended September 30, 2016 and 2015 , net sales by geographic area were as follows (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 United States $ 60,558 84.2 % $ 43,689 86.7 % $ 155,245 83.4 % $ 117,885 83.1 % Other Countries 11,324 15.8 6,687 13.3 30,923 16.6 23,966 16.9 Total $ 71,882 100.0 % $ 50,376 100.0 % $ 186,168 100.0 % $ 141,851 100.0 %
Weighted Average Number of Shares Outstanding and Income Per Share	The calculation of the weighted average number of shares outstanding and earnings per share are as follows (in thousands except per share data): Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 Numerator for basic and diluted earnings per share: Net income $ 3,843 $ 1,521 $ 10,956 $ 14,829 Denominator: Weighted average shares outstanding - basic 52,206 53,709 52,791 53,509 Dilutive effect of stock-based awards 935 982 865 1,162 Diluted weighted average shares outstanding 53,141 54,691 53,656 54,671 Anti-dilutive stock-based awards excluded 227 160 304 160 Net income per common share: Basic $ 0.07 $ 0.03 $ 0.21 $ 0.28 Diluted $ 0.07 $ 0.03 $ 0.20 $ 0.27
Summary of Changes in Estimated Product Warranty Liabilities	Changes in the Company’s estimated product warranty liabilities are as follows (in thousands): Nine Months Ended September 30, 2016 2015 Balance, beginning of period $ 314 $ 675 Utilization of accrual (97 ) (293 ) Warranty expense 531 19 Balance, end of period $ 748 $ 401

Cash, Cash Equivalents and In23

Cash, Cash Equivalents and Investments (Tables)	9 Months Ended
	Sep. 30, 2016
Cash and Cash Equivalents [Abstract]
Summary of Cash, Cash Equivalents and Held-to-Maturity Investments by Type	The following tables summarize the Company's cash, cash equivalents, and held-to-maturity investments at September 30, 2016 and December 31, 2015 (in thousands): As of September 30, 2016 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Cash and Cash Equivalents Short-Term Investments Long-Term Investments Cash $ 45,792 $ — $ — $ 45,792 $ 45,792 $ — $ — Level 1: Money market funds 4,163 — — 4,163 4,163 — — Corporate bonds 36,331 3 (35 ) 36,299 645 29,911 5,775 Subtotal 40,494 3 (35 ) 40,462 4,808 29,911 5,775 Level 2: State and municipal obligations 15,152 1 (8 ) 15,145 — 14,667 485 Certificates of deposit 1,042 — — 1,042 — 1,042 Subtotal 16,194 1 (8 ) 16,187 — 15,709 485 Total $ 102,480 $ 4 $ (43 ) $ 102,441 $ 50,600 $ 45,620 $ 6,260 As of December 31, 2015 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Cash and Cash Equivalents Short-Term Investments Long-Term Investments Cash $ 57,137 $ — $ — $ 57,137 $ 57,137 $ — $ — Level 1: Money market funds 2,389 — — 2,389 2,389 — — Corporate bonds 36,406 — (70 ) 36,336 — 35,677 729 Subtotal 38,795 — (70 ) 38,725 2,389 35,677 729 Level 2: State and municipal obligations 19,002 11 (9 ) 19,004 — 12,000 7,002 Certificates of deposit 3,371 — — 3,371 — 2,577 794 Subtotal 22,373 11 (9 ) 22,375 — 14,577 7,796 Total $ 118,305 $ 11 $ (79 ) $ 118,237 $ 59,526 $ 50,254 $ 8,525
Summary of Amortized Cost and Fair Value of Short-term and Long-term Investments	The following table summarizes the amortized cost and fair value of the short-term and long-term investments held by the Company at September 30, 2016 by contractual maturity (in thousands): Amortized Cost Fair Value Due in less than one year $ 45,620 $ 45,581 Due after one year, through two years 6,260 6,260 Due after two years — — Total short-term and long-term investments $ 51,880 $ 51,841

Inventory (Tables)

Inventory (Tables)	9 Months Ended
	Sep. 30, 2016
Inventory Disclosure [Abstract]
Inventory	Inventories consisted of the following at September 30, 2016 and December 31, 2015 (in thousands): 2016 2015 Raw materials $ 12,908 $ 8,748 Work-in-process 6 105 Finished goods 12,589 6,910 Total inventory $ 25,503 $ 15,763

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill	The changes in the carrying amount of goodwill for the nine months ended September 30, 2016 were as follows (in thousands): Balance, beginning of period $ 9,596 Purchase accounting adjustments (a) (520 ) Foreign currency translation adjustment (191 ) Balance, end of period $ 8,885 (a) Purchase accounting adjustments related to deferred tax liabilities for MediaSolv and Axon Public Safety U.K. LTD. There was no impact to the condensed consolidated statements of operations for these adjustments as a result of the adoption of ASU 2015-16, which was effective for the Company on January 1, 2016.
Intangible Assets Other than goodwill	Intangible assets (other than goodwill) consisted of the following (in thousands): September 30, 2016 December 31, 2015 Useful Life Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Amortized: Domain names 5 years $ 125 $ (125 ) $ — $ 125 $ (120 ) $ 5 Issued patents 4-15 years 1,926 (749 ) 1,177 1,866 (659 ) 1,207 Issued trademarks 3-11 years 628 (301 ) 327 603 (255 ) 348 Customer relationships 4-8 years 945 (206 ) 739 1,035 (93 ) 942 Non-compete agreements 3-4 years 450 (218 ) 232 464 (164 ) 300 Developed technology 7 years 3,470 (699 ) 2,771 3,470 (326 ) 3,144 Total amortized 7,544 (2,298 ) 5,246 7,563 (1,617 ) 5,946 Not amortized: TASER trademark 900 900 900 900 Patents and trademarks pending 970 970 742 742 Total not amortized 1,870 1,870 1,642 1,642 Total intangible assets $ 9,414 $ (2,298 ) $ 7,116 $ 9,205 $ (1,617 ) $ 7,588
Estimated Amortization Expense of Intangible Assets	Estimated amortization for intangible assets with definitive lives for the remaining three months of 2016 , the next five years ended December 31, and thereafter, is as follows (in thousands): 2016 (remaining three months) $ 235 2017 935 2018 922 2019 801 2020 738 2021 731 Thereafter 884 Total $ 5,246

Other Long-Term Assets (Tables)

Other Long-Term Assets (Tables)	9 Months Ended
	Sep. 30, 2016
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Schedule of Other Long-Term Assets	Other long-term assets consisted of the following at September 30, 2016 and December 31, 2015 (in thousands): 2016 2015 Cash surrender value of corporate-owned life insurance policies (Note 1) $ 3,014 $ 2,180 Prepaid commissions (i) 4,927 3,543 Accounts receivable (ii) 10,359 1,227 Restricted cash (iii) 3,095 — Prepaid expenses, deposits and other 367 246 Total other long-term assets $ 21,762 $ 7,196 (i) Prepaid commissions represent customer acquisition costs to secure long-term contracts. The Company capitalizes incremental and direct costs related to a specific contract and recognizes expense over the term of the contract. (ii) Long-term accounts receivable as of September 30, 2016 and December 31, 2015 consist of balances related to sales made under the Officer Safety and TASER 60 Programs (Note 1e). These balances are collectible over the stated contract period, which is typically five years, and are actively monitored for collectability. (iii) Restricted cash represents sales proceeds related to a long-term contract with a specific customer. These proceeds are held in escrow until certain billing milestones are achieved, and then specified amounts are transferred to the Company's operating accounts.

Deferred Revenue (Tables)

Deferred Revenue (Tables)	9 Months Ended
	Sep. 30, 2016
Deferred Revenue Disclosure [Abstract]
Summary of Deferred Revenue	Deferred revenue consisted of the following (in thousands): September 30, 2016 December 31, 2015 Current Long-Term Total Current Long-Term Total Warranty: TASER Weapons $ 10,304 $ 16,286 $ 26,590 $ 7,278 $ 13,982 $ 21,260 Axon 3,299 2,398 5,697 2,332 2,344 4,676 13,603 18,684 32,287 9,610 16,326 25,936 Hardware: TASER Weapons 1,240 2,441 3,681 952 2,459 3,411 Axon 10,257 10,441 20,698 786 7,382 8,168 11,497 12,882 24,379 1,738 9,841 11,579 Axon Services 15,818 4,402 20,220 9,303 4,023 13,326 Other 366 — 366 200 — 200 Total $ 41,284 $ 35,968 $ 77,252 $ 20,851 $ 30,190 $ 51,041 September 30, 2016 December 31, 2015 Current Long-Term Total Current Long-Term Total TASER Weapons $ 11,910 $ 18,727 $ 30,637 $ 8,430 $ 16,441 $ 24,871 Axon 29,374 17,241 46,615 12,421 13,749 26,170 Total $ 41,284 $ 35,968 $ 77,252 $ 20,851 $ 30,190 $ 51,041

Accrued Liabilities (Tables)

Accrued Liabilities (Tables)	9 Months Ended
	Sep. 30, 2016
Payables and Accruals [Abstract]
Accrued Liabilities	Accrued liabilities consisted of the following at September 30, 2016 and December 31, 2015 (in thousands): 2016 2015 Accrued salaries, benefits and bonus $ 5,286 $ 3,637 Accrued professional, consulting and lobbying 1,807 1,098 Accrued warranty expense 748 314 Accrued income and other taxes 2,169 1,215 Other accrued liabilities 6,076 2,379 Accrued liabilities $ 16,086 $ 8,643

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	9 Months Ended
	Sep. 30, 2016
Equity [Abstract]
Summary of Restricted Stock Unit Activity	The following table summarizes RSU activity for the nine months ended September 30, 2016 (number of units and aggregate intrinsic value in thousands): Number of Units Weighted Average Grant-Date Fair Value Aggregate Units outstanding, beginning of year 1,139 $ 19.30 Granted 501 17.84 Released (321 ) 15.72 Forfeited (106 ) 21.61 Units outstanding, end of period 1,213 19.45 $ 34,704
Summary of the Company's Stock Options Activity	The following table summarizes stock option activity for the nine months ended September 30, 2016 (number of units and aggregate intrinsic value in thousands): Number of Options Weighted Average Exercise Price Weighted Average Remaining Contractual Life (years) Aggregate Options outstanding, beginning of year 1,103 $ 5.37 Granted — — Exercised (88 ) 4.92 Expired / terminated — — Options outstanding, end of period 1,015 5.41 2.50 $ 23,555 Options exercisable, end of period 985 5.43 2.51 22,823 Options expected to vest, end of period 25 4.75 2.23 597
Reported Share-Based Compensation	The following table summarizes the composition of stock stock-based compensation for the three and nine months ended September 30, 2016 and 2015 (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 Cost of products sold and services delivered $ 77 $ 118 $ 247 $ 276 Sales, general and administrative expenses 1,348 1,123 4,197 2,982 Research and development expenses 791 622 2,298 1,828 Total stock-based compensation $ 2,216 $ 1,863 $ 6,742 $ 5,086

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2016
Commitments and Contingencies Disclosure [Abstract]
Loss Contingencies	With respect to each of the pending lawsuits, the following table lists the name of plaintiff, the date the Company was served with process, the jurisdiction in which the case is pending, the type of claim and the status of the matter. Plaintiff Month Served Jurisdiction Claim Type Status Derbyshire Nov-09 Ontario, Canada Superior Court of Justice Officer Injury Discovery Phase Doan Apr-10 The Queen's Bench, Alberta, Red Deer Judicial Dist. Wrongful Death Discovery Phase Shymko Dec-10 The Queen's Bench, Winnipeg Centre, Manitoba Wrongful Death Pleading Phase Ramsey Jan-12 12th Judicial Circuit Court, Broward County, FL Wrongful Death Discovery Phase Firman Apr-12 Ontario, Canada Superior Court of Justice Wrongful Death Pleading Phase Schrock Sep-14 San Bernardino County Superior Court, CA Wrongful Death Motion of Summary Judgment Granted on all claims except negligent design and manufacture, subject to repleading by Plaintiff. Plaintiff filed an amended complaint for negligent design claims as well as a Petition for Writ of Mandate or Prohibition Petition from the Court; which writ was summarily denied. Bennett Sep-15 11th Judicial Circuit Court, Miami-Dade County, FL Wrongful Death Discovery Phase Suarez Sep-16 US District Court, Southern District of Florida Wrongful Death Pleading Phase There are no product litigation matters in which the Company is involved that are currently on appeal. The following cases were dismissed or judgment entered during the third quarter of 2016 and through the date of these financial statements. Plaintiff Month Served Jurisdiction Claim Type Status Thompson Mar-10 11th Judicial Circuit Court, Miami-Dade County, FL Wrongful Death Dismissed Hernandez/llach Sep-15 11th Judicial Circuit Court, Miami-Dade County, FL Wrongful Death Dismissed Williams Aug-16 US District Court for the Northern District Georgia Wrongful Death Dismissed
Information Regarding the Company's Insurance Coverage	The following table provides information regarding the Company’s product liability insurance. Remaining insurance coverage is based on information received from the Company’s insurance provider (in millions). Policy Year Policy Start Date Policy End Date Insurance Coverage Deductible Amount Defense Costs Covered Remaining Insurance Coverage Active Cases and Cases on Appeal 2009 12/15/2008 12/15/2009 10.0 1.0 N 10.0 Derbyshire 2010 12/15/2009 12/15/2010 10.0 1.0 N 10.0 Shymko, Doan 2011 12/15/2010 12/15/2011 10.0 1.0 N 10.0 n/a Jan-Jun 2012 12/15/2011 6/25/2012 7.0 1.0 N 7.0 Ramsey, Firman Jul-Dec 2012 6/25/2012 12/15/2012 12.0 1.0 N 12.0 n/a 2013 12/15/2012 12/15/2013 12.0 1.0 N 12.0 n/a 2014 12/15/2013 12/15/2014 11.0 4.0 N 11.0 Schrock 2015 12/15/2014 12/15/2015 10.0 5.0 N 10.0 Bennett 2016 12/15/2015 12/15/2016 10.0 5.0 N 10.0 Suarez

Segment Data (Tables)

Segment Data (Tables)	9 Months Ended
	Sep. 30, 2016
Segment Reporting [Abstract]
Summary of Operational Information Relative to the Company's Reportable Segments	Information relative to the Company’s reportable segments is as follows (in thousands): Three Months Ended September 30, 2016 Three Months Ended September 30, 2015 TASER Weapons Axon Total TASER Weapons Axon Total Product sales $ 52,938 $ 10,266 $ 63,204 $ 39,520 $ 7,745 $ 47,265 Service revenue — 8,678 8,678 — 3,111 3,111 Net sales 52,938 18,944 71,882 39,520 10,856 50,376 Cost of products sold 14,973 8,691 23,664 12,445 5,829 18,274 Cost of services delivered — 1,653 1,653 — 1,034 1,034 Gross margin 37,965 8,600 46,565 27,075 3,993 31,068 Sales, general and administrative 16,439 11,682 28,121 11,941 5,893 17,834 Research and development 1,408 5,950 7,358 1,151 5,377 6,528 Income (loss) from operations $ 20,118 $ (9,032 ) $ 11,086 $ 13,983 $ (7,277 ) $ 6,706 Purchase of property and equipment $ 1,064 $ 307 $ 1,371 $ 1,900 $ 169 $ 2,069 Purchase of intangible assets 77 77 154 114 87 201 Purchase of property and equipment and intangible assets in connection with business acquisition — — — 1,453 1,452 3,005 Depreciation and amortization 537 364 901 603 345 948 Nine Months Ended September 30, 2016 Nine Months Ended September 30, 2015 TASER Axon Total TASER Axon Total Product sales $ 144,307 $ 23,438 $ 167,745 $ 115,686 $ 18,177 $ 133,863 Service revenue — 18,423 18,423 — 7,988 7,988 Net sales 144,307 41,861 186,168 115,686 26,165 141,851 Cost of products sold 43,998 17,174 61,172 34,805 12,692 47,497 Cost of services delivered — 4,230 4,230 — 2,695 2,695 Gross margin 100,309 20,457 120,766 80,881 10,778 91,659 Sales, general and administrative 46,395 30,938 77,333 33,469 14,373 47,842 Research and development 3,773 17,222 20,995 3,418 13,574 16,992 Income (loss) from operations $ 50,141 $ (27,703 ) $ 22,438 $ 43,994 $ (17,169 ) $ 26,825 Purchase of property and equipment $ 2,729 $ 606 $ 3,335 $ 2,345 $ 1,404 $ 3,839 Purchase of intangible assets 190 149 339 195 207 402 Purchase of property and equipment and intangible assets in connection with business acquisition — — — 1,453 11,146 12,599 Depreciation and amortization 1,669 1,075 2,744 1,689 621 2,310

Business Acquisitions (Tables)

Business Acquisitions (Tables)	9 Months Ended
	Sep. 30, 2016
Business Combinations [Abstract]
Schedule of Business Acquisitions, by Acquisition	The major classes of assets and liabilities to which the Company has allocated the purchase price are as follows (in thousands): Accounts receivable $ 726 Inventory 497 Property and equipment 583 Other Assets 20 Intangible assets 881 Goodwill 1,441 Accounts payable and accrued liabilities (207 ) Notes payable (169 ) Income tax liabilities (438 ) Total purchase price $ 3,334 The major classes of assets and liabilities to which the Company allocated the purchase price were as follows (in thousands): Accounts receivable and other current assets $ 590 Inventory 35 Property and equipment 53 Intangible assets 4,145 Goodwill 5,496 Accounts payable and accrued liabilities (697 ) Deferred revenue (111 ) Deferred income tax liabilities, net (688 ) Total purchase price $ 8,823

Organization and Summary of S33

Organization and Summary of Significant Accounting Policies - Additional Information (Detail) $ in Thousands	3 Months Ended			9 Months Ended		12 Months Ended
	Sep. 30, 2016USD ($)subsidiarycountry	Dec. 31, 2015USD ($)	Sep. 30, 2015USD ($)country	Sep. 30, 2016USD ($)SegmentsubsidiarySourceCustomercountry	Sep. 30, 2015USD ($)Customercountry	Dec. 31, 2015USD ($)Customer
Summary Of Significant Accounting Policy [Line Items]
Number of wholly owned subsidiaries | subsidiary	2			2
Number of reportable segments | Segment				2
Number of revenue sources | Source				2
Warranty period				1 year
Corporate owned life insurance policies fair value	$ 3,000	$ 2,180		$ 3,000		$ 2,180
Loss on disposal of intangible assets				(21)	$ (216)
Net income	3,843		$ 1,521	10,956	14,829
Cost of products sold and services delivered	25,317		19,308	65,402	50,192
Sales, general and administrative	$ 28,121		$ 17,834	$ 77,333	$ 47,842
Recognition of Transaction
Summary Of Significant Accounting Policy [Line Items]
Net income		(800)				(800)
Cost of products sold and services delivered		$ 400
Sales, general and administrative						$ 200
Minimum
Summary Of Significant Accounting Policy [Line Items]
Service term for services purchased				3 years
Maximum
Summary Of Significant Accounting Policy [Line Items]
Service term for services purchased				5 years
Extended Product Warranty | Minimum
Summary Of Significant Accounting Policy [Line Items]
Extended warranty period				1 year
Service term for services purchased				1 year
Extended Product Warranty | Maximum
Summary Of Significant Accounting Policy [Line Items]
Extended warranty period				5 years
Service term for services purchased				5 years
Evidence. Com
Summary Of Significant Accounting Policy [Line Items]
Subscription period				5 years
Device upgrade period				2 years 6 months
Geographic Concentration Risk | Sales Revenue, Net
Summary Of Significant Accounting Policy [Line Items]
Number of foreign countries | country	0		0	0	0
Customer Concentration Risk | Sales Revenue, Net
Summary Of Significant Accounting Policy [Line Items]
Number of customers | Customer				0	0
Customer Concentration Risk | Accounts Receivable
Summary Of Significant Accounting Policy [Line Items]
Number of customers | Customer				1		1
Concentration risk, percentage				18.60%		12.50%

Organization and Summary of S34

Organization and Summary of Significant Accounting Policies - Net Sales by Geographic Area (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Segment Reporting Information [Line Items]
Net sales by geographic area	$ 71,882	$ 50,376	$ 186,168	$ 141,851
Percentage of net sales by geographic area	100.00%	100.00%	100.00%	100.00%
United States
Segment Reporting Information [Line Items]
Net sales by geographic area	$ 60,558	$ 43,689	$ 155,245	$ 117,885
Percentage of net sales by geographic area	84.20%	86.70%	83.40%	83.10%
Other Countries
Segment Reporting Information [Line Items]
Net sales by geographic area	$ 11,324	$ 6,687	$ 30,923	$ 23,966
Percentage of net sales by geographic area	15.80%	13.30%	16.60%	16.90%

Organization and Summary of S35

Organization and Summary of Significant Accounting Policies - Weighted Average Number of Shares Outstanding and Income Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Numerator for basic and diluted earnings per share:
Net income	$ 3,843	$ 1,521	$ 10,956	$ 14,829
Denominator:
Weighted average shares outstanding—basic	52,206	53,709	52,791	53,509
Dilutive effect of stock-based awards (in shares)	935	982	865	1,162
Diluted weighted average shares outstanding	53,141	54,691	53,656	54,671
Anti-dilutive stock-based awards excluded	227	160	304	160
Net income (loss) per common share:
Basic (in dollars per share)	$ 0.07	$ 0.03	$ 0.21	$ 0.28
Diluted (in dollars per share)	$ 0.07	$ 0.03	$ 0.20	$ 0.27

Organization and Summary of S36

Organization and Summary of Significant Accounting Policies - Summary of Changes in Estimated Product Warranty Liabilities (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Balance, beginning of period	$ 314	$ 675
Utilization of accrual	(97)	(293)
Warranty expense	531	19
Balance, end of period	$ 748	$ 401

Cash, Cash Equivalents, and Inv

Cash, Cash Equivalents, and Investments - Summary of Cash, Cash Equivalents and Held-to-Maturity Investments by Type (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Restricted Cash and Cash Equivalents Items [Line Items]
Amortized Cost	$ 102,480	$ 118,305
Gross Unrealized Gains	4	11
Gross Unrealized Losses	(43)	(79)
Fair Value	102,441	118,237
Cash and Cash Equivalents	50,600	59,526
Short-term investments	45,620	50,254
Long-term investments	6,260	8,525
Fair Value, Inputs, Level 1
Restricted Cash and Cash Equivalents Items [Line Items]
Amortized Cost	40,494	38,795
Gross Unrealized Gains	3	0
Gross Unrealized Losses	(35)	(70)
Fair Value	40,462	38,725
Cash and Cash Equivalents	4,808	2,389
Short-term investments	29,911	35,677
Long-term investments	5,775	729
Fair Value, Inputs, Level 2
Restricted Cash and Cash Equivalents Items [Line Items]
Amortized Cost	16,194	22,373
Gross Unrealized Gains	1	11
Gross Unrealized Losses	(8)	(9)
Fair Value	16,187	22,375
Cash and Cash Equivalents	0	0
Short-term investments	15,709	14,577
Long-term investments	485	7,796
Fair Value, Inputs, Level 2 | State and Municipal Obligations
Restricted Cash and Cash Equivalents Items [Line Items]
Amortized Cost	15,152	19,002
Gross Unrealized Gains	1	11
Gross Unrealized Losses	(8)	(9)
Fair Value	15,145	19,004
Cash and Cash Equivalents	0	0
Short-term investments	14,667	12,000
Long-term investments	485	7,002
Fair Value, Inputs, Level 2 | Certificates of Deposit
Restricted Cash and Cash Equivalents Items [Line Items]
Amortized Cost	1,042	3,371
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	1,042	3,371
Cash and Cash Equivalents	0	0
Short-term investments	1,042	2,577
Long-term investments		794
Cash
Restricted Cash and Cash Equivalents Items [Line Items]
Amortized Cost	45,792	57,137
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	45,792	57,137
Cash and Cash Equivalents	45,792	57,137
Short-term investments	0	0
Long-term investments	0	0
Money Market Funds | Fair Value, Inputs, Level 1
Restricted Cash and Cash Equivalents Items [Line Items]
Amortized Cost	4,163	2,389
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	4,163	2,389
Cash and Cash Equivalents	4,163	2,389
Short-term investments	0	0
Long-term investments	0	0
Corporate Bonds | Fair Value, Inputs, Level 1
Restricted Cash and Cash Equivalents Items [Line Items]
Amortized Cost	36,331	36,406
Gross Unrealized Gains	3	0
Gross Unrealized Losses	(35)	(70)
Fair Value	36,299	36,336
Cash and Cash Equivalents	645	0
Short-term investments	29,911	35,677
Long-term investments	$ 5,775	$ 729

Cash, Cash Equivalents, and I38

Cash, Cash Equivalents, and Investments - Summary of Amortized Cost and Fair Value of Short-term and Long-term Investments (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Due in less than one year	$ 45,620	$ 50,254
Due after one year, through two years	6,260	$ 8,525
Amortized Cost
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Due in less than one year	45,620
Due after one year, through two years	6,260
Due after two years	0
Total short-term and long-term investments	51,880
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Due in less than one year	45,581
Due after one year, through two years	6,260
Due after two years	0
Total short-term and long-term investments	$ 51,841

Inventory (Detail)

Inventory (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Inventory Disclosure [Abstract]
Raw materials	$ 12,908	$ 8,748
Work-in-process	6	105
Finished goods	12,589	6,910
Total inventory	$ 25,503	$ 15,763

Goodwill and Intangible Asset40

Goodwill and Intangible Assets - Schedule of Goodwill (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2016USD ($)
Goodwill [Roll Forward]
Balance, beginning of period	$ 9,596
Purchase accounting adjustments	(520)
Foreign currency translation adjustment	(191)
Balance, end of period	$ 8,885

Goodwill and Intangible Asset41

Goodwill and Intangible Assets - Intangible Assets Other than Goodwill (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Acquired Indefinite-lived Intangible Assets [Line Items]
Amortized intangible assets, Gross Carrying Amount	$ 7,544	$ 7,563
Accumulated Amortization	(2,298)	(1,617)
Total	5,246	5,946
Not amortized intangible assets, Carrying Amount	1,870	1,642
Intangible assets, Gross Carrying Amount	9,414	9,205
Intangible assets, Net Carrying Amount	7,116	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	$ 970	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	(125)	(120)
Total	0	5
Issued patents
Acquired Indefinite-lived Intangible Assets [Line Items]
Amortized intangible assets, Gross Carrying Amount	1,926	1,866
Accumulated Amortization	(749)	(659)
Total	$ 1,177	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	$ 628	603
Accumulated Amortization	(301)	(255)
Total	$ 327	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	$ 945	1,035
Accumulated Amortization	(206)	(93)
Total	$ 739	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	$ 450	464
Accumulated Amortization	(218)	(164)
Total	$ 232	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	(699)	(326)
Total	$ 2,771	$ 3,144

Goodwill and Intangible asset42

Goodwill and Intangible assets - Estimated Amortization Expense of Intangible Assets (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization expense	$ 200	$ 300	$ 700	$ 500
2016 (remaining three months)	235		235
2,017	935		935
2,018	922		922
2,019	801		801
2,020	738		738
2,021	731		731
Thereafter	884		884
Total	$ 5,246		$ 5,246		$ 5,946

Other Long-Term Assets (Details

Other Long-Term Assets (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Cash surrender value of corporate-owned life insurance policies	$ 3,000	$ 2,180
Prepaid commissions	4,927	3,543
Accounts receivable	10,359	1,227
Restricted cash	3,095	0
Prepaid expenses, deposits and other	367	246
Total other long-term assets	$ 21,762	$ 7,196
Long-term accounts receivable, typical collectability term	5 years

Deferred Revenue - Summary of D

Deferred Revenue - Summary of Deferred Revenue (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Deferred Revenue Arrangement [Line Items]
Deferred revenue, Current	$ 41,284	$ 20,851
Deferred revenue, Long-Term	35,968	30,190
Total deferred revenue	77,252	51,041
Warranty
Deferred Revenue Arrangement [Line Items]
Deferred revenue, Current	13,603	9,610
Deferred revenue, Long-Term	18,684	16,326
Total deferred revenue	32,287	25,936
Hardware
Deferred Revenue Arrangement [Line Items]
Deferred revenue, Current	11,497	1,738
Deferred revenue, Long-Term	12,882	9,841
Total deferred revenue	24,379	11,579
AXON services
Deferred Revenue Arrangement [Line Items]
Deferred revenue, Current	15,818	9,303
Deferred revenue, Long-Term	4,402	4,023
Total deferred revenue	20,220	13,326
Other
Deferred Revenue Arrangement [Line Items]
Deferred revenue, Current	366	200
Deferred revenue, Long-Term	0	0
Total deferred revenue	366	200
TASER Weapons
Deferred Revenue Arrangement [Line Items]
Deferred revenue, Current	11,910	8,430
Deferred revenue, Long-Term	18,727	16,441
Total deferred revenue	30,637	24,871
TASER Weapons | Warranty
Deferred Revenue Arrangement [Line Items]
Deferred revenue, Current	10,304	7,278
Deferred revenue, Long-Term	16,286	13,982
Total deferred revenue	26,590	21,260
TASER Weapons | Hardware
Deferred Revenue Arrangement [Line Items]
Deferred revenue, Current	1,240	952
Deferred revenue, Long-Term	2,441	2,459
Total deferred revenue	3,681	3,411
Axon
Deferred Revenue Arrangement [Line Items]
Deferred revenue, Current	29,374	12,421
Deferred revenue, Long-Term	17,241	13,749
Total deferred revenue	46,615	26,170
Axon | Warranty
Deferred Revenue Arrangement [Line Items]
Deferred revenue, Current	3,299	2,332
Deferred revenue, Long-Term	2,398	2,344
Total deferred revenue	5,697	4,676
Axon | Hardware
Deferred Revenue Arrangement [Line Items]
Deferred revenue, Current	10,257	786
Deferred revenue, Long-Term	10,441	7,382
Total deferred revenue	$ 20,698	$ 8,168

Accrued Liabilities (Detail)

Accrued Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2014
Payables and Accruals [Abstract]
Accrued salaries, benefits and bonus	$ 5,286	$ 3,637
Accrued professional, consulting and lobbying	1,807	1,098
Accrued warranty expense	748	314	$ 401	$ 675
Accrued income and other taxes	2,169	1,215
Other accrued liabilities	6,076	2,379
Accrued liabilities	$ 16,086	$ 8,643

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2016USD ($)
Tax Credit Carryforward [Line Items]
Deferred tax assets, net	$ 16.8
Research and development tax credit studies	12.9
Unrecognized tax benefits	$ 3.6
Overall effective tax rate, after discrete period adjustments	50.10%
Effective tax rate, before discrete period adjustment	48.30%
Return-to-provision adjustment	$ 0.4
Federal
Tax Credit Carryforward [Line Items]
Unrecognized tax benefits	3.5
State
Tax Credit Carryforward [Line Items]
Unrecognized tax benefits	0.1
Expiring in 2019
Tax Credit Carryforward [Line Items]
Tax credit carryforward, amount	1.2
Research and Development Credits
Tax Credit Carryforward [Line Items]
Tax credit carryforward, valuation allowance	$ 1.4

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Detail) - USD ($)	1 Months Ended	3 Months Ended	9 Months Ended
	May 31, 2016	Sep. 30, 2016	Sep. 30, 2016	Sep. 30, 2015	Feb. 29, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option available for future grants (in shares)		2,900,000	2,900,000
Tax payments, for net share settlement of share based award			$ 1,299,000	$ 848,000
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized stock-based compensation expense related to non-vested stock options		$ 18,000,000	$ 18,000,000
Weighted average period over which costs are recognized			2 years 6 months 7 days
Units meeting performance criteria (in shares)			321,000
Approximate units outstanding (in shares)		1,213,000	1,213,000			1,139,000
Performance Based Restricted Stock Unit
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Approximate units of performance restricted stock granted (in shares)			100,000
Approximate units outstanding (in shares)		200,000	200,000
Maximum additional shares to be issued		200,000	200,000
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares withheld, for net share settlement of share based award			67,400
Tax payments, for net share settlement of share based award			$ 1,300,000
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate intrinsic value price per share (in dollars per share)		$ 28.61	$ 28.61
Total intrinsic value of options exercised			$ 1,800,000	$ 13,300,000
Number of options outstanding (in shares)		1,015,000	1,015,000			1,103,000
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options outstanding (in shares)		200,000	200,000
Unvested performance options (in shares)		30,600	30,600
Unvested shares, expected to vest		25,000	25,000
2013 Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Additional shares authorized	2,000,000
2014 Stock Repurchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding common stock repurchase program authorized amount (up to)					$ 50,000,000
Shares repurchased during period		0	1,800,000	300,000
Cost of shares repurchased			$ 33,800,000	$ 7,600,000
Average cost of shares repurchased (in dollars per share)			$ 18.90	$ 25.86
Average price of shares repurchased (in dollars per share)			$ 18.87
Remaining authorized repurchase amount		$ 16,200,000	$ 16,200,000

Stockholders' Equity - Summary

Stockholders' Equity - Summary of Restricted Stock Unit Activity (Detail) - Restricted Stock $ / shares in Units, shares in Thousands, $ in Thousands	9 Months Ended
	Sep. 30, 2016USD ($)$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Number of Units outstanding, beginning of year (in shares) | shares	1,139
Number of Units, Granted (in shares) | shares	501
Number of Units, Released (in shares) | shares	(321)
Number of Units, Forfeited (in shares) | shares	(106)
Number of Units outstanding, end of period (in shares) | shares	1,213
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Weighted Average Grant Date Fair Value, Units outstanding, beginning of year (in dollars per share) | $ / shares	$ 19.30
Weighted Average Grant Date Fair Value, Granted (in dollars per share) | $ / shares	17.84
Weighted Average Grant Date Fair Value, Released (in dollars per share) | $ / shares	15.72
Weighted Average Grant Date Fair Value, Forfeited (in dollars per share) | $ / shares	21.61
Weighted Average Grant Date Fair Value, Units outstanding, end of period (in dollars per share) | $ / shares	$ 19.45
Aggregate intrinsic value at end of period | $	$ 34,704

Stockholders' Equity - Summar49

Stockholders' Equity - Summary of the Company's Stock Options Activity (Detail) - Stock Options $ / shares in Units, shares in Thousands, $ in Thousands	9 Months Ended
	Sep. 30, 2016USD ($)$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Number of options, Options outstanding, beginning of year (in shares) | shares	1,103
Number of options, Granted (in shares) | shares	0
Number of options, Exercised (in shares) | shares	(88)
Number of options, Expired / terminated (in shares) | shares	0
Number of options, Options outstanding, end of year (in shares) | shares	1,015
Number of options, Options exercisable, end of period (in shares) | shares	985
Number of options, Options expected to vest, end of period (in shares) | shares	25
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted average exercise price, Options outstanding, beginning of year (in dollars per share) | $ / shares	$ 5.37
Weighted average exercise price, Granted (in dollars per share) | $ / shares	0
Weighted average exercise price, Exercised (in dollars per share) | $ / shares	4.92
Weighted average exercise price, Expired / terminated (in dollars per share) | $ / shares	0
Weighted average exercise price, Options outstanding, end of period (in dollars per share) | $ / shares	5.41
Weighted average exercise price, Options exercisable, end of period (in dollars per share) | $ / shares	5.43
Weighted average exercise price, Options expected to vest, end of period (in dollars per share) | $ / shares	$ 4.75
Weighted average remaining contractual life, Options outstanding, end of period	2 years 6 months
Weighted average remaining contractual life, Options exercisable, end of period	2 years 6 months 4 days
Weighted average remaining contractual life, Options expected to vest, end of period	2 years 2 months 23 days
Aggregate intrinsic value, Options outstanding, end of period | $	$ 23,555
Aggregate intrinsic value, Options exercisable, end of period | $	22,823
Aggregate intrinsic value, Options expected to vest, end of period | $	$ 597

Stockholders' Equity - Reported

Stockholders' Equity - Reported Share-Based Compensation (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 2,216	$ 1,863	$ 6,742	$ 5,086
Cost of products sold and services delivered
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	77	118	247	276
Sales, general and administrative expenses
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	1,348	1,123	4,197	2,982
Research and development expenses
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 791	$ 622	$ 2,298	$ 1,828

Line of Credit - Additional Inf

Line of Credit - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2016USD ($)	Dec. 31, 2015USD ($)
Debt Instrument [Line Items]
Total availability under line of credit agreement	$ 10,000,000
Line of credit borrowings	0	$ 0
Letters of credit outstanding amount	3,900,000
Available borrowing under letter of credit	$ 6,100,000
Varying interest on line of credit agreement	LIBOR plus 1.5% or Prime less 0.75%
Maturity date of line of credit	Jul. 31, 2017
Maximum ratio of total liabilities to tangible net worth	1
Minimum required fixed coverage charge ratio	1.25
Trailing period used for calculating ratios	12 months
Company's leverage ratio	0.88
Fixed coverage charge ratio	2.23
Line of Credit | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Line of credit interest rate	1.50%
Line of Credit | Prime Rate
Debt Instrument [Line Items]
Line of credit interest rate	0.75%

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) $ in Millions	3 Months Ended
	Sep. 30, 2011Case	Sep. 30, 2016USD ($)Lawsuit	Apr. 30, 2016USD ($)
Commitments and Contingencies Disclosure [Abstract]
Number of lawsuits against Company | Lawsuit		8
Number of active product liability cases | Case	55
Loss Contingencies [Line Items]
Letters of credit outstanding amount		$ 3.9
Surety Bond
Loss Contingencies [Line Items]
Bonds outstanding		5.7
Expiring May 2017
Loss Contingencies [Line Items]
Letters of credit outstanding amount		2.7
Expiring February 2017
Loss Contingencies [Line Items]
Letters of credit outstanding amount		1.2
Expected to be Released in 2018 | Surety Bond
Loss Contingencies [Line Items]
Outstanding surety bonds expected to be released during period		0.4
Expiring in 2020 | Surety Bond
Loss Contingencies [Line Items]
Bonds outstanding		2.4
Expiring in 2021 and thereafter | Surety Bond
Loss Contingencies [Line Items]
Bonds outstanding		$ 2.9
Paris, France | International Chamber of Commerce
Loss Contingencies [Line Items]
Loss contingency, estimate of possible loss			$ 0.6

Commitments and Contingencies53

Commitments and Contingencies - Information Regarding the Company's Insurance Coverage (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2016USD ($)
2,009
Product Liability Contingency [Line Items]
Insurance Coverage	$ 10
Deductible Amount	1
Remaining Insurance Coverage	10
2,010
Product Liability Contingency [Line Items]
Insurance Coverage	10
Deductible Amount	1
Remaining Insurance Coverage	10
2,011
Product Liability Contingency [Line Items]
Insurance Coverage	10
Deductible Amount	1
Remaining Insurance Coverage	10
Jan - Jun 2012
Product Liability Contingency [Line Items]
Insurance Coverage	7
Deductible Amount	1
Remaining Insurance Coverage	7
Jul - Dec 2012
Product Liability Contingency [Line Items]
Insurance Coverage	12
Deductible Amount	1
Remaining Insurance Coverage	12
2,013
Product Liability Contingency [Line Items]
Insurance Coverage	12
Deductible Amount	1
Remaining Insurance Coverage	12
2,014
Product Liability Contingency [Line Items]
Insurance Coverage	11
Deductible Amount	4
Remaining Insurance Coverage	11
2,015
Product Liability Contingency [Line Items]
Insurance Coverage	10
Deductible Amount	5
Remaining Insurance Coverage	10
2,016
Product Liability Contingency [Line Items]
Insurance Coverage	10
Deductible Amount	5
Remaining Insurance Coverage	$ 10

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2016USD ($)	Sep. 30, 2015USD ($)	Sep. 30, 2016USD ($)	Sep. 30, 2015USD ($)	Dec. 31, 2015USD ($)	Jul. 16, 2015USD ($)owner
Consulting | Officer
Related Party Transaction [Line Items]
Transaction expenses incurred by parent company	$ 14,000	$ 44,000	$ 111,000	$ 156,000
Outstanding payables due to related party	3,000		3,000		$ 31,000
Software Licensing and Subscription | Officer
Related Party Transaction [Line Items]
Quarterly software licensing fee	30,000
Deferred costs related to annual software subscription	$ 80,800		$ 80,800		$ 36,000
Non-cancellable Operating Leases | Employee
Related Party Transaction [Line Items]
Number of former owners | owner						1
Term of contract			5 years
Aggregate annual rental payments						$ 25,000

Employee Benefit Plans - Additi

Employee Benefit Plans - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Defined Benefit Plan Disclosure [Line Items]
Employee deferrals deemed vested percentage upon contribution			100.00%
Company's contributions to the plan	$ 400	$ 300	$ 1,200	$ 900
Company's expected contributions to the plan			$ 8
Maximum
Defined Benefit Plan Disclosure [Line Items]
Deferral percentage of base salary (up to)			80.00%
Deferral percentage of other compensation (up to)			100.00%

Segment Data - Additional Infor

Segment Data - Additional Information (Detail) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016USD ($)	Sep. 30, 2015USD ($)	Sep. 30, 2016USD ($)Segment	Sep. 30, 2015USD ($)
Segment Reporting [Abstract]
Number of reportable segments of company | Segment			2
Segment Reporting Information [Line Items]
Product sales	$ 63,204	$ 47,265	$ 167,745	$ 133,863
Service revenue	8,678	3,111	18,423	7,988
Net sales	71,882	50,376	186,168	141,851
Cost of products sold	23,664	18,274	61,172	47,497
Cost of services delivered	1,653	1,034	4,230	2,695
Gross margin	46,565	31,068	120,766	91,659
Sales, general and administrative	28,121	17,834	77,333	47,842
Research and development	7,358	6,528	20,995	16,992
Income from operations	11,086	6,706	22,438	26,825
Purchase of property and equipment	1,371	2,069	3,335	3,839
Purchase of intangible assets	154	201	339	402
Purchase of property and equipment and intangible assets in connection with business acquisition	0	3,005	0	12,599
Depreciation and amortization	901	948	2,744	2,310
Operating Segments | TASER Weapons
Segment Reporting Information [Line Items]
Product sales	52,938	39,520	144,307	115,686
Service revenue	0	0	0	0
Net sales	52,938	39,520	144,307	115,686
Cost of products sold	14,973	12,445	43,998	34,805
Cost of services delivered	0	0	0	0
Gross margin	37,965	27,075	100,309	80,881
Sales, general and administrative	16,439	11,941	46,395	33,469
Research and development	1,408	1,151	3,773	3,418
Income from operations	20,118	13,983	50,141	43,994
Purchase of property and equipment	1,064	1,900	2,729	2,345
Purchase of intangible assets	77	114	190	195
Purchase of property and equipment and intangible assets in connection with business acquisition	0	1,453	0	1,453
Depreciation and amortization	537	603	1,669	1,689
Operating Segments | Axon
Segment Reporting Information [Line Items]
Product sales	10,266	7,745	23,438	18,177
Service revenue	8,678	3,111	18,423	7,988
Net sales	18,944	10,856	41,861	26,165
Cost of products sold	8,691	5,829	17,174	12,692
Cost of services delivered	1,653	1,034	4,230	2,695
Gross margin	8,600	3,993	20,457	10,778
Sales, general and administrative	11,682	5,893	30,938	14,373
Research and development	5,950	5,377	17,222	13,574
Income from operations	(9,032)	(7,277)	(27,703)	(17,169)
Purchase of property and equipment	307	169	606	1,404
Purchase of intangible assets	77	87	149	207
Purchase of property and equipment and intangible assets in connection with business acquisition	0	1,452	0	11,146
Depreciation and amortization	$ 364	$ 345	$ 1,075	$ 621

Business Acquisitions (Details)

Business Acquisitions (Details) - USD ($)	Jul. 16, 2015	May 05, 2015	Sep. 30, 2016	Mar. 31, 2016	Sep. 30, 2016	Dec. 31, 2015
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Goodwill			$ 8,885,000		$ 8,885,000	$ 9,596,000
MediaSolv Solutions Corporation
Business Acquisition [Line Items]
Consideration transferred		$ 8,800,000	200,000	$ 1,000,000	1,200,000
Cash acquired		100,000
Payments to acquire businesses, net		7,800,000
Contingent liability		1,000,000
Additional earn-out provisions and compensation adjustments		$ 4,000,000
Intangible assets, weighted average useful life		6 years 6 months
Acquisition transaction costs		$ 200,000
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Accounts receivable and other current assets		590,000
Inventory		35,000
Property and equipment		53,000
Intangible assets		4,145,000
Goodwill		5,496,000
Accounts payable and accrued liabilities		(697,000)
Deferred revenue		(111,000)
Deferred income tax liabilities, net		(688,000)
Total purchase price		$ 8,823,000
MediaSolv Solutions Corporation | Commission Expenses | Accrued Liabilities
Business Acquisition [Line Items]
Contingent liability			200,000		200,000
Tactical Safety Responses Limited
Business Acquisition [Line Items]
Consideration transferred	$ 3,300,000
Cash acquired	$ 700,000
Intangible assets, weighted average useful life	7 years
Acquisition transaction costs	$ 100,000
Cash payments to acquire business	4,000,000
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Accounts receivable and other current assets	726,000
Inventory	497,000
Property and equipment	583,000
Intangible assets	881,000
Other Assets	20,000
Goodwill	1,441,000
Accounts payable and accrued liabilities	(207,000)
Notes payable	(169,000)
Deferred income tax liabilities, net	(438,000)
Total purchase price	$ 3,334,000
Tactical Safety Responses Limited | Commission Expenses | Accrued Liabilities
Business Acquisition [Line Items]
Contingent liability			$ 100,000		$ 100,000