Axon Enterprise (AXON) 10-K 7 Mar 16 2015 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Feb. 12, 2016	Jun. 30, 2015
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-K
Document Period End Date	Dec. 31, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Common Stock, Shares Outstanding		53,694,071
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 1,763

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 59,526	$ 48,367
Short-term investments	50,254	32,774
Accounts and notes receivable, net of allowance of $322 and $251 as of December 31, 2015 and 2014, respectively	27,701	30,735
Inventory	15,763	18,323
Prepaid expenses and other current assets	8,165	4,443
Total current assets	161,409	134,642
Property and equipment, net	21,848	17,523
Deferred income tax assets, net	13,719	16,063
Intangible assets, net	7,588	3,115
Goodwill	9,596	2,206
Long-term investments	8,525	9,296
Other assets	7,196	2,523
Total assets	229,881	185,368
Current liabilities:
Accounts payable	7,333	7,682
Accrued liabilities	8,643	9,245
Current portion of deferred revenue	20,851	14,020
Customer deposits	1,226	988
Current portion of notes payable and capital lease payable	87	38
Total current liabilities	38,140	31,973
Deferred revenue, net of current portion	30,190	21,668
Liability for unrecognized tax benefits	1,315	1,471
Long-term deferred compensation	2,199	1,121
Long-term business acquisition contingent consideration	952	0
Long-term portion of notes payable and capital lease payable	81	29
Total liabilities	$ 72,877	$ 56,262
Commitments and contingencies
Stockholders’ equity:
Preferred stock, $0.00001 par value; 25,000,000 shares authorized; no shares issued and outstanding as of December 31, 2015 and 2014	$ 0	$ 0
Common stock, $0.00001 par value; 200,000,000 shares authorized; 53,692,192 and 53,000,867 shares issued and outstanding as of December 31, 2015 and 2014, respectively	1	1
Additional paid-in capital	178,143	162,641
Treasury stock at cost,18,432,158 and 18,139,958 shares as of December 31, 2015 and 2014, respectively	(122,201)	(114,645)
Retained earnings	100,978	81,045
Accumulated other comprehensive income	83	64
Total stockholders’ equity	157,004	129,106
Total liabilities and stockholders’ equity	$ 229,881	$ 185,368

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Allowance on accounts receivable	$ 322	$ 251
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	53,692,192	53,000,867
Common stock, shares outstanding	53,692,192	53,000,867
Treasury stock, shares	18,432,158	18,139,958

Consolidated Statements of Oper

Consolidated Statements of Operations and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Statement [Abstract]
Net sales	$ 197,892	$ 164,525	$ 137,831
Cost of products sold and services delivered	69,245	62,977	51,988
Gross margin	128,647	101,548	85,843
Operating expenses:
Sales, general and administrative	69,698	54,158	46,557
Research and development	23,614	14,885	9,888
Litigation judgments	0	0	1,450
Total operating expenses	93,312	69,043	57,895
Income from operations	35,335	32,505	27,948
Interest and other income (expense), net	26	(194)	86
Income before provision for income taxes	35,361	32,311	28,034
Provision for income taxes	15,428	12,393	9,790
Net income	$ 19,933	$ 19,918	$ 18,244
Net income per common and common equivalent shares:
Basic (in dollars per share)	$ 0.37	$ 0.38	$ 0.35
Diluted (in dollars per share)	$ 0.36	$ 0.37	$ 0.34
Weighted average number of common and common equivalent shares outstanding:
Basic (in shares)	53,548	52,948	51,880
Diluted (in shares)	54,638	54,500	54,152
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 19,933	$ 19,918	$ 18,244
Foreign currency translation adjustments	19	66	55
Comprehensive income	$ 19,952	$ 19,984	$ 18,299

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Retained Earnings
Beginning balance, Shares at Dec. 31, 2012		52,770,392		13,363,789
Beginning balance at Dec. 31, 2012	$ 87,285	$ 1	$ 111,661	$ (67,203)	$ (57)	$ 42,883
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock options exercised and RSUs vested, net of withholdings, Shares		2,896,072
Stock options exercised and RSUs vested, net of withholdings	15,048		15,048
Stock-based compensation	4,340		4,340
Excess tax benefit from stock-based compensation	6,797		6,800
Purchase of treasury stock, Shares		(3,048,966)		3,048,966
Purchase of treasury stock	(25,000)			$ (25,000)
Shares issued related to business acquisition, Shares		107,749
Shares issued related to business acquisition	1,578		1,578
Net income	18,244					18,244
Foreign currency translation adjustments	55				55
Ending balance at Dec. 31, 2013	108,347	$ 1	139,424	$ (92,203)	(2)	61,127
Ending balance, Shares at Dec. 31, 2013		52,725,247		16,412,755
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock options exercised and RSUs vested, net of withholdings, Shares		2,002,823
Stock options exercised and RSUs vested, net of withholdings	9,653		9,653
Stock-based compensation	5,579		5,579
Excess tax benefit from stock-based compensation	7,985		8,000
Purchase of treasury stock, Shares		(1,727,203)		1,727,203
Purchase of treasury stock	(22,442)			$ (22,442)
Net income	19,918					19,918
Foreign currency translation adjustments	66				66
Ending balance at Dec. 31, 2014	129,106	$ 1	162,641	$ (114,645)	64	81,045
Ending balance, Shares at Dec. 31, 2014		53,000,867		18,139,958
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock options exercised and RSUs vested, net of withholdings, Shares		983,525
Stock options exercised and RSUs vested, net of withholdings	1,303		1,303
Stock-based compensation	7,263		7,263
Excess tax benefit from stock-based compensation	6,936		6,900
Purchase of treasury stock, Shares		(292,200)		292,200
Purchase of treasury stock	(7,556)			$ (7,556)
Net income	19,933					19,933
Foreign currency translation adjustments	19				19
Ending balance at Dec. 31, 2015	$ 157,004	$ 1	$ 178,143	$ (122,201)	$ 83	$ 100,978
Ending balance, Shares at Dec. 31, 2015		53,692,192		18,432,158

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash flows from operating activities:
Net income	$ 19,933	$ 19,918	$ 18,244
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	3,291	4,317	5,131
(Gain) loss on disposals of property and equipment, net	(19)	17	(27)
Loss on disposal of intangibles	225	215	168
Bond premium amortization	1,650	957	289
Stock-based compensation	7,263	5,579	4,340
Deferred income taxes	994	3,598	621
Unrecognized tax benefits	(156)	202	219
Excess tax benefit from stock-based compensation	(6,936)	(7,985)	(6,797)
Change in assets and liabilities:
Accounts and notes receivable	4,244	(8,247)	(4,387)
Inventory	3,140	(7,214)	(116)
Prepaid expenses and other assets	(8,579)	(1,080)	(569)
Accounts payable, accrued and other liabilities	5,868	9,852	6,560
Deferred revenue	15,289	15,469	8,096
Customer deposits	238	(166)	654
Net cash provided by operating activities	46,445	35,432	32,426
Cash flows from investing activities:
Purchases of investments	(62,464)	(32,900)	(29,112)
Proceeds from call / maturity of investments	44,105	10,997	9,380
Purchases of property and equipment	(6,003)	(2,505)	(1,783)
Proceeds from disposal of fixed assets	40	10	34
Purchases of intangible assets	(501)	(183)	(323)
Business acquisitions, net of cash acquired	(11,186)	0	(1,258)
Net cash used in investing activities	(36,009)	(24,581)	(23,062)
Cash flows from financing activities:
Repurchase of common stock	(7,556)	(22,442)	(25,000)
Proceeds from options exercised	2,673	11,000	15,357
Payroll tax payments for net-settled stock awards	(1,370)	(1,347)	(309)
Payments on capital lease obligation	(80)	(36)	(34)
Excess tax benefit from stock-based compensation	6,936	7,985	6,797
Net cash provided by (used in) financing activities	603	(4,840)	(3,189)
Effect of exchange rate changes on cash and cash equivalents	120	85	(31)
Net increase in cash and cash equivalents	11,159	6,096	6,144
Cash and cash equivalents, beginning of year	48,367	42,271	36,127
Cash and cash equivalents, end of year	$ 59,526	$ 48,367	$ 42,271

Organization and Summary of Sig

Organization and Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2015
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. The accompanying consolidated financial statements include the accounts of the Company, and its wholly owned subsidiaries, including TASER International Europe SE (“TASER Europe”), TASER International B.V., and MediaSolv Solutions Corporation ("MediaSolv"). All material intercompany accounts, transactions, and profits have been eliminated. a. Basis of Presentation and Use of Estimates The accompanying consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America (“U.S. GAAP”). The preparation of these consolidated financial statements requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Significant estimates and assumptions in these 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. Cash, Cash Equivalents and Investments Cash, cash equivalents and investments include cash, money market funds, certificates of deposit, state and municipal obligations and corporate bonds. The Company places its cash and cash equivalents with high quality financial institutions. Although the Company deposits its cash with multiple financial institutions, its deposits, at times, may exceed federally insured limits. Cash and cash equivalents include funds on hand and highly liquid investments purchased with initial maturity of three months or less. Short-term investments include securities with an expected maturity date within one year of the balance sheet date that do not meet the definition of a cash equivalent, and long-term investments are securities with an expected maturity date greater than one year. Based on management’s intent and ability, the Company’s investments are classified as held to maturity investments and are recorded at amortized cost. Held-to-maturity investments are reviewed quarterly for impairment to determine if other-than-temporary declines in the carrying value have occurred for any individual investment. Other-than-temporary declines in the value of held-to-maturity investments are recorded as expense in the period the determination is made. c. 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 potentially excess, obsolete or slow-moving inventories to their net realizable value. These provisions are based on management’s best estimate after considering historical demand, projected future demand, inventory purchase commitments, industry and market trends and conditions and other factors. Management evaluates inventory costs for abnormal costs due to excess production capacity and treats such costs as period costs. d. Property and Equipment Property and equipment are stated at cost, net of accumulated depreciation and amortization. Additions and improvements are capitalized, while ordinary maintenance and repair expenditures are charged to expense as incurred. Depreciation is calculated using the straight-line method over the estimated useful lives of the assets. e. Software Development Costs The Company expenses software development costs, including costs to develop software products or the software component of products to be marketed to external users, before technological feasibility of such products is reached. The Company has determined that technological feasibility is reached shortly before the release of those products and as a result, the development costs incurred after the establishment of technological feasibility and before the release of those products are not material. Software development costs also include costs to develop software programs to be used solely to meet the Company's internal needs and cloud-based applications used to deliver its services. The Company capitalizes development costs related to these software applications once the preliminary project stage is complete and it is probable that the project will be completed and the software will be used to perform the intended function. Additionally, the Company capitalizes qualifying costs incurred for upgrades and enhancements to existing software that result in additional functionality. Costs related to preliminary project planning activities, post-implementation activities, maintenance and minor modifications are expensed as incurred. Internal-use software is amortized on a straight line basis over its estimated useful life. The capitalized development costs related to the Company’s software as a service (“SaaS”) product, Evidence.com, were fully amortized as of December 31, 2013. Amortization of capitalized software development costs was $0.6 million for the year ended December 31, 2013. Management evaluates the useful lives of these assets on an annual basis and tests for impairment whenever events or changes in circumstances occur that could impact the recoverability of these assets. f. Valuation of Goodwill, Intangibles and Long-lived Assets The Company recorded goodwill related to the acquisitions of Tactical Safety Responses Limited, MediaSolv Solutions Corporation and Familiar, Inc. The recoverability of goodwill is evaluated and tested for impairment at least annually during the fourth quarter or more often, if and when circumstances indicate that goodwill may not be recoverable. Finite-lived intangible assets and other long-lived assets are amortized over their useful lives. Management evaluates whether events and circumstances have occurred that indicate the remaining estimated useful life of long-lived assets and intangible assets may warrant revision or that the remaining balance of these assets, including intangible assets with indefinite lives, may not be recoverable. Circumstances that might indicate long-lived assets might not be recoverable 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 the Company's products are branded and marketed. When performing a 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. No impairment losses were recorded during the years ended December 31, 2015 , 2014 and 2013 . g. Customer Deposits The Company requires deposits in advance of shipment for certain customer sales orders. Customer deposits are recorded as a current liability in the accompanying consolidated balance sheets. h. 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 at the end of the contract period. 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 typically 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 over the five -year 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 and pays the first of its 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. Sales tax collected on sales is netted against government remittances and thus, recorded on a net basis. Training revenue is recorded as the service is 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 7 for further disclosures about of 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 estimate and is based on their 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. The Company may, from time to time, enter into agreements with its customers to finance their purchases with a note receivable that may range in terms up to five years. Sales are recorded at the fair value of the note, which is generally sold and assigned to a third-party financing company. The terms of the assignments are such that the Company expects to receive payment within 30 days of the original sale. The assignments are non-recourse and the Company has no obligations or continuing involvement with the notes receivable. Prior to entering into an assignment, the Company evaluates the credit quality and financial condition of the third-party financing company. The Company does not generally record interest income on notes receivable due to minimal holding periods, nor has the Company recognized gains or losses upon the assignment of the notes. As of December 31, 2015 and 2014 , there was no balance in accounts and notes receivable related to such arrangements. i. Cost of Products Sold and Services Provided Cost of products sold represents manufacturing costs, consisting of materials, labor and overhead related to finished goods and components. Shipping costs incurred related to product delivery are also included in cost of products sold. Cost of services delivered includes third party cloud services, and software maintenance and support costs, including personnel costs, associated with supporting Evidence.com. j. Advertising Costs The Company expenses advertising costs in the period in which they are incurred. The Company incurred advertising costs of $0.6 million , $0.3 million and $0.2 million in the years ended December 31, 2015 , 2014 and 2013 , respectively. Advertising costs are included in sales, general and administrative expenses in the accompanying statements of operations. k. 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 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 consolidated balance sheets. Changes in the Company’s estimated product warranty liabilities were as follows (in thousands): 2015 2014 2013 Balance, January 1 $ 675 $ 955 $ 484 Utilization of accrual (299 ) (676 ) (530 ) Warranty (recoveries) expense (62 ) 396 1,001 Balance, December 31 $ 314 $ 675 $ 955 l. Research and Development Expenses The Company expenses as incurred research and development costs that do not meet the qualifications to be capitalized. The Company incurred research and development expense of $23.6 million , $14.9 million and $9.9 million , in 2015 , 2014 and 2013 , respectively. m. Income Taxes Income taxes are accounted for under the asset and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement amounts of assets and liabilities and their respective tax bases and operating loss and tax credit carry forwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in future years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rate is recognized in income in the period that includes the enactment date. Deferred tax assets are reduced through the establishment of a valuation allowance if, based upon available evidence, it is determined that it is more likely than not that the deferred tax assets will not be realized. The Company recognizes the tax benefit from an uncertain tax position only if it is more likely than not that the tax position will be sustained on examination by the taxing authorities, based on the technical merits of the position. The tax benefits recognized in the consolidated financial statements from such a position are measured based on the largest benefit that has a greater than 50% likelihood of being realized upon ultimate resolution. Management also assesses whether uncertain tax positions, as filed, could result in the recognition of a liability for possible interest and penalties. The Company’s policy is to include interest and penalties related to unrecognized tax benefits as a component of income tax expense. Refer to Note 10 for additional information regarding the change in unrecognized tax benefits. n. Concentration of Credit Risk and Major Customers / Suppliers Financial instruments that potentially subject the Company to concentrations of credit risk consist of accounts and notes receivable and cash. 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 losses. Uncollectible accounts are written off when deemed uncollectible, and accounts receivable are presented net of an allowance for doubtful accounts, which totaled $0.3 million as of December 31, 2015 and 2014 . Historically, the Company has experienced a low level of write-offs related to doubtful accounts. The Company maintains the majority of its cash and cash equivalents accounts at three depository institutions. As of December 31, 2015 , the aggregate balances in such accounts were $57.1 million . The Company’s balances with these institutions regularly exceed Federal Deposit Insurance Corporation (“FDIC”) insured limits for domestic deposits and various deposit insurance programs covering our deposits in the Netherlands, the United Kingdom and Germany. To manage the related credit exposure, management continually monitors the creditworthiness of the financial institutions where the Company has deposits. The Company sells some of its products through a network of unaffiliated distributors. The Company also reserves the right to sell directly to the end user to secure the customer’s account. In 2015 and 2014 , no customer represented more than 10% of total net sales. In 2013 one distributor represented 12.2% of total net sales with no other customers exceeding 10% . At December 31, 2015 and 2014 , the Company had a trade receivable from one unaffiliated customer comprising 12.5% and 13.4% , respectively, of the aggregate accounts receivable balance. The Company currently purchases finished circuit boards and injection-molded plastic components from suppliers located in the U.S., Mexico and Taiwan. Although the Company currently obtains many of these components from single source suppliers, the Company owns the injection molded component tooling used in their production. As a result, management believes it could obtain alternative suppliers in most cases without incurring significant production delays. The Company also purchases small, machined parts from a vendor in Taiwan, custom cartridge assemblies from a proprietary vendor in the U.S., and electronic components from a variety of foreign and domestic distributors. Management believes that there are readily available alternative suppliers in most cases who can consistently meet the Company's needs for these components. The Company acquires most of its components on a purchase order basis and does not have long-term contracts with suppliers. o. 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 December 31, 2015 and 2014 , 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 December 31, 2015 and 2014 was $2.2 million and $1.1 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 and accrued liabilities. Due to the short-term nature of these instruments, their fair values approximate their carrying values on the balance sheet. p. Segment and Geographic Information The Company is comprised of two reportable segments: the sale of CEWs, accessories and other products and services (the “TASER Weapons” segment); and the video business which includes the TASER Cam, Axon camera products and 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 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 16. For the three years ended December 31, 2015 , 2014 and 2013 , net sales by geographic area were as follows (in thousands): Year Ended December 31, 2015 2014 2013 United States $ 161,803 81.8 % $ 132,205 80.4 % $ 115,674 83.9 % Other Countries 36,089 18.2 32,320 19.6 22,157 16.1 Total $ 197,892 100.0 % $ 164,525 100.0 % $ 137,831 100.0 % 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 years ended December 31, 2015 , 2014 and 2013 , no individual country outside the U.S. represented more than 10% of net sales. Substantially all of the Company’s assets are located in the U.S. q. Stock-Based Compensation The Company calculates the fair value of stock options using the Black-Scholes-Merton option pricing valuation model, which incorporates various assumptions including volatility, expected life and risk-free interest rates. No options were awarded during the years ended December 31, 2015 , 2014 or 2013 . The fair value of restricted stock units is estimated as the closing price of the Company's common stock on the date of grant. The estimated fair value of stock-based compensation awards is amortized to expense on a straight-line basis over the requisite 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. See Note 12 for further disclosure about the Company’s stock-based compensation. r. 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. Diluted income per share reflects the potential dilution that would occur if outstanding stock options were exercised utilizing the treasury stock method. The calculation of the weighted average number of shares outstanding and earnings per share are as follows (in thousands except per share data): For the Year Ended December 31, 2015 2014 2013 Numerator for basic and diluted earnings per share: Net income $ 19,933 $ 19,918 $ 18,244 Denominator: Weighted average shares outstanding—basic 53,548 52,948 51,880 Dilutive effect of stock-based awards 1,090 1,552 2,272 Diluted weighted average shares outstanding 54,638 54,500 54,152 Anti-dilutive stock-based awards excluded 198 177 507 Net income per common share: Basic $ 0.37 $ 0.38 $ 0.35 Diluted $ 0.36 $ 0.37 $ 0.34 s. Recently Issued Accounting Guidance In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2014-09, “Revenue from Contracts with Customers (Topic 606)” (“ASU 2014-09”). The core principle of ASU 2014-09 provides that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. This guidance also requires more detailed disclosures to enable users of financial statements to understand the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. The amendments are effective for annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period. The Company anticipates it will apply the guidance retrospectively to each prior period reported, and is evaluating the impact the adoption of this guidance will have on its financial position, results of operations and cash flows. In June 2014, the FASB issued ASU No. 2014-12, “Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could Be Achieved after the Requisite Service Period” (“ASU 2014-12”). The amendments in ASU 2014-12 require that a performance target that affects vesting and that could be achieved after the requisite service period be treated as a performance condition. A reporting entity should apply existing guidance in ASC Topic No. 718, “Compensation—Stock Compensation” (“ASC 718”) as it relates to awards with performance conditions that affect vesting to account for such awards. The amendments are effective for annual periods and interim periods within those annual periods beginning after December 15, 2015. 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 July 2015, the FAS

Cash, Cash Equivalents and Inve

Cash, Cash Equivalents and Investments	12 Months Ended
	Dec. 31, 2015
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 December 31 (in thousands): 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 As of December 31, 2014 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Cash and Cash Equivalents Short-Term Investments Long-Term Investments Cash $ 44,260 $ — $ — $ 44,260 $ 44,260 $ — $ — Level 1: Money market funds 3,932 — — 3,932 3,932 — — Corporate bonds 20,388 — (34 ) 20,354 — 15,656 4,732 Subtotal 24,320 — (34 ) 24,286 3,932 15,656 4,732 Level 2: State and municipal obligations 19,145 18 — 19,163 175 15,891 3,079 Certificates of deposit 2,712 — — 2,712 — 1,227 1,485 Subtotal 21,857 18 — 21,875 175 17,118 4,564 Total $ 90,437 $ 18 $ (34 ) $ 90,421 $ 48,367 $ 32,774 $ 9,296 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 December 31, 2015 . None of Company’s investments have been in an unrealized loss position for more than one year. The following table summarizes the amortized cost and fair value of the short-term and long-term investments held by the Company at December 31, 2015 by contractual maturity (in thousands): Amortized Cost Fair Value Due in less than one year $ 50,254 $ 50,190 Due after one year, through two years 8,525 8,521 Due after two years — — Total short-term and long-term investments $ 58,779 $ 58,711

Inventory

Inventory	12 Months Ended
	Dec. 31, 2015
Inventory Disclosure [Abstract]
Inventory	Inventory Inventories consisted of the following at December 31 (in thousands): 2015 2014 Raw materials $ 8,748 $ 11,031 Work-in-process 105 111 Finished goods 6,910 7,181 Total inventory $ 15,763 $ 18,323

Property and Equipment

Property and Equipment	12 Months Ended
	Dec. 31, 2015
Property, Plant and Equipment [Abstract]
Property and Equipment	Property and Equipment Property and equipment consisted of the following at December 31 (in thousands): Estimated Useful Life 2015 2014 Land N/A $ 2,900 $ 2,900 Building and leasehold improvements 3-39 years 15,246 14,302 Production equipment 3-7 years 18,689 18,443 Computer equipment 3-5 years 8,048 7,209 Furniture and office equipment 5-7 years 4,116 3,066 Vehicles 5 years 713 270 Website development costs 3 years 601 601 Capitalized software development costs 3 years 3,670 3,670 Construction-in-process N/A 3,885 968 Total cost 57,868 51,429 Less: Accumulated depreciation (36,020 ) (33,906 ) Property and equipment, net $ 21,848 $ 17,523 During the years ended December 31, 2015 , 2014 and 2013 the Company recognized a net gain (loss) of approximately $19,000 , $(17,000) and $27,000 , respectively, for the disposal of property and equipment. Depreciation and amortization expense relative to property and equipment, including equipment under capital lease, was $2.3 million , $4.0 million and $4.8 million for the years ended December 31, 2015 , 2014 and 2013 , respectively, of which $0.7 million , $2.8 million and $3.7 million is included in cost of products sold and services provided for the respective years.

Goodwill and Intangible Assets

Goodwill and Intangible Assets	12 Months Ended
	Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	Goodwill and Intangible Assets The changes in the carrying amount of goodwill for the year ended December 31, 2015 were as follows (in thousands): Balance, January 1, 2015 $ 2,206 Goodwill acquired 7,390 Balance, December 31, 2015 $ 9,596 Intangible assets (other than goodwill) consisted of the following (in thousands): December 31, 2015 December 31, 2014 Useful Life Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Amortized: Domain names 5 years $ 125 $ (120 ) $ 5 $ 125 $ (114 ) $ 11 Issued patents 4-15 years 1,866 (659 ) 1,207 1,759 (549 ) 1,210 Issued trademarks 3-11 years 603 (255 ) 348 566 (205 ) 361 Customer relationships 4-8 years 1,035 (93 ) 942 — — — Non-compete agreements 3-4 years 464 (164 ) 300 — — — Developed technology 7 years 3,470 (326 ) 3,144 — — — Total amortized 7,563 (1,617 ) 5,946 2,450 (868 ) 1,582 Not amortized: TASER trademark 900 900 900 900 Patents and trademarks pending 742 742 633 633 Total not amortized 1,642 1,642 1,533 1,533 Total intangible assets $ 9,205 $ (1,617 ) $ 7,588 $ 3,983 $ (868 ) $ 3,115 Amortization expense related to intangible assets was $0.8 million , $0.2 million and $0.2 million for the years ended December 31, 2015 , 2014 and 2013 , respectively. Estimated amortization for intangible assets with definitive lives for the next five years is as follows for the years ended December 31 (in thousands): 2016 $ 942 2017 938 2018 925 2019 803 2020 741 Thereafter 1,597 Total $ 5,946

Other Long-Term Assets

Other Long-Term Assets	12 Months Ended
	Dec. 31, 2015
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 December 31 (in thousands): 2015 2014 Cash surrender value of corporate-owned life insurance policies (Note 1) $ 2,180 $ 1,080 Prepaid commissions (i) 3,543 1,058 Accounts receivable (ii) 1,227 — Prepaid expenses, deposits and other 246 385 Total other long-term assets $ 7,196 $ 2,523 (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 December 31, 2015 consist of balances related to sales made under the Officer Safety Program (Note 1h). These balances are collectible over the stated contract period, which is typically five years, and are actively monitored for collectability.

Deferred Revenue

Deferred Revenue	12 Months Ended
	Dec. 31, 2015
Deferred Revenue Disclosure [Abstract]
Deferred Revenue	Deferred Revenue Deferred revenue consisted of the following at December 31 (in thousands): December 31, 2015 December 31, 2014 Current Long-Term Total Current Long-Term Total Warranty: TASER Weapons $ 7,278 $ 13,982 $ 21,260 $ 6,591 $ 13,809 $ 20,400 Axon 2,332 2,344 4,676 679 894 1,573 9,610 16,326 25,936 7,270 14,703 21,973 Hardware: TASER Weapons 952 2,459 3,411 365 753 1,118 Axon 786 7,382 8,168 491 2,643 3,134 1,738 9,841 11,579 856 3,396 4,252 Axon Services 9,303 4,023 13,326 5,717 3,569 9,286 Other 200 — 200 177 — 177 Total $ 20,851 $ 30,190 $ 51,041 $ 14,020 $ 21,668 $ 35,688 December 31, 2015 December 31, 2014 Current Long-Term Total Current Long-Term Total TASER Weapons and other $ 8,430 $ 16,441 $ 24,871 $ 7,133 $ 14,562 $ 21,695 Axon 12,421 13,749 26,170 6,887 7,106 13,993 Total $ 20,851 $ 30,190 $ 51,041 $ 14,020 $ 21,668 $ 35,688

Accrued Liabilities

Accrued Liabilities	12 Months Ended
	Dec. 31, 2015
Payables and Accruals [Abstract]
Accrued Liabilities	Accrued Liabilities Accrued liabilities consisted of the following at December 31 (in thousands): 2015 2014 Accrued salaries and benefits $ 3,637 $ 3,699 Accrued judgments and settlements 65 108 Accrued professional fees 718 257 Accrued warranty expense 314 675 Accrued income and other taxes 1,215 539 Other accrued expenses 2,694 3,967 Accrued liabilities $ 8,643 $ 9,245

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies a. Operating and capital lease obligations The Company has entered into operating leases for various office space, storage facilities and equipment. As of December 31, 2015 , the Company's leases are for terms ranging from less than one year to 15 years. The Company's leases generally contain multi-year renewal options and escalation clauses. Rent expense under all operating leases, including both cancelable and non-cancelable leases, was $1.0 million , $0.9 million and $0.8 million for the years ended December 31, 2015 , 2014 , and 2013 , respectively. Future minimum lease payments under non-cancelable leases at December 31, 2015 , are as follows (in thousands): Operating Capital 2016 $ 771 $ 30 2017 776 — 2018 702 — 2019 474 — 2020 484 — Thereafter 1,112 — Total minimum lease payments $ 4,319 30 Less: Amount representing interest (1 ) Capital lease obligation $ 29 b. Purchase commitments The Company routinely enters into cancelable purchase orders with many of its key vendors. Based on the strategic relationships with many of these vendors, the Company’s ability to cancel these purchase orders and maintain a favorable relationship would be limited. As of December 31, 2015 , the Company has approximately $23.0 million of open purchase orders. c. Litigation Product Litigation The Company is currently named as a defendant in 9 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. One recent lawsuit alleges fraud and misrepresentation and is seeking punitive damages in addition to compensatory 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 carrier 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 through the date of these financial statements, product liability cases have been reduced from 55 active to 9 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 Thompson Mar-10 11th Judicial Circuit Court, Miami-Dade County, FL Suspect Injury During Arrest 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, Manatee 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 Discover Phase - Trial scheduled July 2016 Llach Sep-15 11th Judicial Circuit Court, Miami-Dade County, FL Wrongful Death Discovery Phase Bennett Sep-15 11th Judicial Circuit Court, Miami-Dade County, FL Wrongful Death Discovery Phase There were 7 cases that were dismissed or judgment entered during the fourth quarter of 2015 and through the date of these financial statements. Cases that were dismissed or judgment entered in prior fiscal quarters are not included. Plaintiff Month Served Jurisdiction Claim Type Status Koon Dec-08 17th Judicial Circuit Court, Broward County, FL Training Injury Dismissed Moore Nov-14 St. Louis County Circuit Court, MO Wrongful Death Dismissed Jones Jan-15 Los Angeles County Superior Court, CA Suspect Injury Dismissed McKelvey Apr-15 US District Court, OR Wrongful Death Dismissed Price Jul-15 US District Court, OR Wrongful Death Dismissed Mitchell Apr-12 US District Court, ED MI Wrongful Death Company won appeal with three judge panel, Plaintiff's petition for full Court of Appeals review denied Demery Aug-15 US District Court, WD LA 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 2004 12/1/2003 12/1/2004 $ 2.0 $ 0.1 N $ 2.0 n/a 2005 12/1/2004 12/1/2005 10.0 0.3 Y 7.0 n/a 2006 12/1/2005 12/1/2006 10.0 0.3 Y 3.7 n/a 2007 12/1/2006 12/1/2007 10.0 0.3 Y 8.0 n/a 2008 12/1/2007 12/15/2008 10.0 0.5 Y — n/a 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 Thompson, 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 Llach, Bennett 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. This litigation is in the pleading 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. The first amended complaint seeks a judgment of infringement, monetary damages, a permanent injunction, punitive damages and attorneys’ fees and costs. The Company believes the first amended complaint is frivolous and the Company will vigorously defend this litigation. This litigation is in the pleading phase. 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 its historical experience with matters of a similar nature, the specific facts and circumstances asserted, the likelihood of prevailing, and the severity of any potential loss. The Company reevaluates and updates its accruals as matters progress over time. Based on the Company's assessment of outstanding litigation and claims as of December 31, 2015 , 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 insurance or will not be in excess of amounts recognized or provided by insurance coverage and will not have a material adverse effect on the Company's operating results, financial condition or cash flows. d. Employment Agreements The Company has employment agreements with certain key executives. The Company may terminate the agreements with or without cause. Should the Company terminate the agreements without cause, or upon a change of control of the Company or death or disability of the employee, the employee, or family of the employee, are entitled to additional compensation. Under these circumstances, these officers and employees would receive cash compensation amounts remaining under their contracts upon termination, which range from approximately $1.0 million to $2.0 million in the aggregate at December 31, 2015 , depending on the nature of the termination event. In March 2015, the Company finalized its severance agreement with a former executive whose position was eliminated in 2014, and for which the Company had accrued approximately $0.5 million as of December 31, 2014. e. 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. The Company expects to fulfill all contractual performance obligations related to outstanding guarantees. At December 31, 2015 , the Company had outstanding letters of credit of approximately $3.0 million . Of that amount, $2.7 million is expected to expire in May 2017 and $0.3 million is expected to expire in January 2017. Additionally, the Company had approximately $2.4 million of outstanding surety bonds at December 31, 2015 , with $2.2 million expiring in July 2018 and the remaining $0.2 million expected to be released during the third quarter of 2016.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Significant components of the Company’s deferred income tax assets and liabilities are as follows at December 31 (in thousands): 2015 2014 Deferred income tax assets: Net operating loss carryforward $ 649 $ 343 Deferred revenue 6,762 4,141 Deferred compensation 1,252 423 Inventory reserve 956 508 Non-qualified and non-employee stock option expense 3,393 3,094 Capitalized research and development 3,348 4,847 Alternative minimum tax carryforward — 1,081 Research and development tax credit carryforward 2,386 2,139 Reserves, accruals, and other 1,067 1,897 Total deferred income tax assets 19,813 18,473 Deferred income tax liabilities: Depreciation (2,228 ) (1,674 ) Amortization (1,979 ) (236 ) Other (187 ) — Total deferred income tax liabilities (4,394 ) (1,910 ) Net deferred income tax assets before valuation allowance 15,419 16,563 Valuation allowance (1,700 ) (500 ) Net deferred income tax assets $ 13,719 $ 16,063 In November 2015, the FASB issued ASU No. 2015-17, “Income Taxes (Topic 740): Balance Sheet Classification of Deferred Taxes (“ASU 2015-17”). This standard requires that deferred tax assets and liabilities be classified as noncurrent on the balance sheet rather than being separated into current and noncurrent. The Company elected early adoption of ASU 2015-17 effective December 31, 2015, on a retrospective basis. Adoption of this ASU resulted in a reclassification of net current deferred tax assets to the net noncurrent deferred tax asset in the Consolidated Balance Sheet as of both December 31, 2015 and December 31, 2014. This accounting change had no impact on the Company's consolidated results of operations or comprehensive income. For the years ended December 31, 2015, 2014 and 2013 the provision for income taxes includes $6.9 million , $8.0 million and $6.8 million , respectively, of tax expense resulting from stock-based compensation tax benefits that have been recorded as increases to additional paid-in capital on the consolidated statement of changes in stockholders’ equity. The Company has $0.3 million of state net operating losses ("NOLs") which expire at various dates between 2016 and 2031 . The Company also has Federal NOLs of $1.3 million which expire between 2031 and 2035 , and are subject to limitation under IRC Section 382. The Company has $43,000 of federal research and development ("R&D") credits which expire in 2022 and 2023, and are also subject to limitation under IRC Section 382. The Company has $5.8 million of Arizona R&D credits carrying forward, which expire at various dates between 2018 and 2029 , and California R&D credit carry forwards for financial reporting purposes of $0.1 million which do not expire. In the UK, the Company has $1.0 million of NOLs which do not expire. In preparing the Company’s consolidated financial statements, management has assessed the likelihood that deferred income tax assets will be realized from future taxable income. In evaluating the ability to recover its deferred income tax assets, management considers all available evidence, positive and negative; including the Company’s 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 income tax assets will not be realized. Management exercises significant judgment in determining the Company’s provisions for income taxes, its deferred income tax assets and liabilities and its future taxable income for purposes of assessing its ability to utilize any future tax benefit from its deferred income 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 December 31, 2015, the Company continues to demonstrate three-year cumulative pre-tax income in the U.S. federal and Arizona tax jurisdictions; however, the Arizona R&D Tax Credits start to expire in 2018 with a significant tranche with a gross value of $1.2 million expiring in 2019. Under the Company’s new 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. Significant components of the provision for income taxes are as follows for the years ended December 31 (in thousands): 2015 2014 2013 Current: Federal $ 13,594 $ 7,793 $ 7,963 State 996 800 987 Total current 14,590 8,593 8,950 Deferred: Federal 288 2,656 764 State 984 942 (143 ) Foreign (278 ) — — Total deferred 994 3,598 621 Tax provision recorded as an increase in liability for unrecorded tax benefits (156 ) 202 219 Provision for income taxes $ 15,428 $ 12,393 $ 9,790 A reconciliation of the Company’s effective income tax rate to the federal statutory rate follows for the years ended December 31 (in thousands): 2015 2014 2013 Federal income tax at the statutory rate $ 12,347 $ 11,236 $ 9,812 State income taxes, net of federal benefit 1,061 1,433 1,283 Difference between statutory and foreign tax rates (i) 2,442 — — Permanent differences (ii) (205 ) 98 (96 ) Research and development (1,050 ) (452 ) (386 ) Return to provision adjustment (67 ) 28 (361 ) Change in liability for unrecognized tax benefits (156 ) 202 219 Incentive stock option benefit (144 ) (616 ) (538 ) Change in valuation allowance 1,200 500 — Other — (36 ) (143 ) Provision for income taxes $ 15,428 $ 12,393 $ 9,790 Effective tax rate 43.6 % 38.4 % 34.9 % (i) The difference between statutory and foreign tax rates of $2.4 million was largely driven by losses incurred in a newly formed foreign entity for which no tax benefit will be realized, partially reduced by a tax benefit for newly formed foreign entities for which the statutory tax rate is lower than the U.S. statutory tax rate. (ii) Permanent differences include certain expenses that are not deductible for tax purposes including lobbying fees as well as favorable items including the domestic production activities deduction The Company has completed research and development tax credit studies which identified approximately $12.0 million in tax credits for federal, Arizona and California income tax purposes related to the 2003 through 2015 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 $3.2 million as of December 31, 2015. In addition, management accrued approximately $0.2 million for estimated uncertain tax positions related to certain state income tax liabilities. Should the unrecognized tax benefit of $3.4 million be recognized, the Company’s effective tax rate would be favorably impacted. The Company recognizes interest and penalties related to unrecognized tax benefits within the income tax expense line in the accompanying Consolidated Statement of Operations. As of December 31, 2015 and 2014 , respectively, the Company had accrued interest of $55,000 and $46,000 . The following table presents a roll forward of the Company's liability for unrecognized tax benefits, exclusive of accrued interest, as of December 31 (in thousands): 2015 2014 2013 Balance, beginning of period $ 3,325 $ 3,110 $ 2,903 (Decrease) increase in previous year tax positions (389 ) — 57 Increase in current year tax positions 270 121 144 Decrease due to lapse of statute of limitations (14 ) — — Increase related to adjustment of previous estimates of activity 204 94 6 Balance, end of period $ 3,396 $ 3,325 $ 3,110 Federal income tax returns for 2004 through 2015 remain open to examination by the U.S. Internal Revenue Service (the “IRS”), while state and local income tax returns for 2004 through 2015 also remain open to examination by state taxing authorities. The 2004 through 2009 income tax returns are only open to the extent that net operating loss or other tax attributes carrying forward from those years were utilized in 2011 through 2015. The foreign tax returns for 2012 through 2015 also remain open to examination. During 2015 the IRS completed its examination of the Company's 2012 tax year. The Company has not been notified by any major state tax jurisdictions that it will be subject to examination. The Company considers the earnings of certain non-U.S. subsidiaries to be indefinitely reinvested outside of the United States on the basis of estimates that future domestic cash generation will be sufficient to meet future domestic cash needs and the Company's specific plans for reinvestment of those subsidiary earnings. It is not practicable to estimate the amount of the deferred tax liability, if any, related to investments in those foreign subsidiaries. If the Company decides to repatriate the foreign earnings, it would need to adjust its income tax provision in the period it determined that the earnings will no longer be indefinitely invested outside the United States.

Line of Credit

Line of Credit	12 Months Ended
	Dec. 31, 2015
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 December 31, 2015 and 2014 , there were no borrowings under the line. As of December 31, 2015 , the Company had letters of credit outstanding of $3.0 million under the facility and available borrowing of $7.0 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 minimum leverage ratio and 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 December 31, 2015 , the Company’s tangible net worth ratio was 0.52 :1 and its fixed charge coverage ratio was 2.41 :1. Accordingly, the Company was in compliance with these covenants.

Stockholders' Equity

Stockholders' Equity	12 Months Ended
	Dec. 31, 2015
Equity [Abstract]
Stockholders' Equity	Stockholders’ Equity a. Common Stock and Preferred Stock The Company has authorized the issuance of two classes of stock designated as “common stock” and “preferred stock,” each having a par value of $0.00001 per share. The Company is authorized to issue 200 million shares of common stock and 25 million shares of preferred stock. b. Stock Repurchase In May 2014, the Company's Board of Directors authorized a stock repurchase program to acquire up to $30.0 million of the Company’s outstanding common stock subject to stock market conditions and corporate considerations. Under this program, which was completed in the third quarter of 2015, the Company purchased approximately 2.0 million common shares for a total cost of approximately $30.0 million , or a weighted average cost, including commissions of $14.85 per share. As of December 31, 2015, no amounts remain available under the plan for future purchases. In February 2013, the Company’s Board of Directors authorized a stock repurchase program to acquire up to $25.0 million of the Company’s outstanding common stock subject to stock market conditions and corporate considerations. Under this program, which was completed in the second quarter of 2013, the Company purchased approximately 3.0 million common shares for a total cost of approximately $25.0 million , or a weighted average cost, including commissions, of $8.20 per share. c. Stock-based Compensation Plans The Company has historically utilized stock-based compensation, consisting of restricted stock units (“RSUs”) and stock options, for key employees and non-employee directors as a means of attracting and retaining quality personnel. Service-based grants generally have a vesting period of 3 to 5 years and a contractual maturity of ten years . Performance-based grants generally have vesting periods ranging from 1 to 5 years and a contractual maturity of ten years . On February 25, 2013, the Company’s Board of Directors approved the 2013 Stock Incentive Plan (the “2013 Plan") which was subsequently approved by stockholders at the Annual Meeting of Stockholders on May 23, 2013. Under the 2013 Plan, the Company reserved for future grants: (i) 1.6 million shares of common stock, plus (ii) the number of shares of common stock that were authorized but unissued under the Company’s 2009 Stock Incentive Plan (the “2009 Plan”) as of the effective date of the 2013 Plan, and (iii) the number of shares of stock that have been granted under the 2009 Plan that either terminate, expire or lapse for any reason after the effective date of the 2013 Plan. As of December 31, 2015 , approximately 1.3 million shares remain available for future grants. Shares issued upon exercise of stock awards from these plans have historically been issued from the Company’s authorized unissued shares. d. Performance-based stock awards The Company has issued performance-based stock options and performance-based 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 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. e. Restricted Stock Units The following table summarizes RSU activity for the years ended December 31: 2015 2014 2013 Number of Units Weighted Average Grant-Date Fair Value Number of Units Weighted Average Grant-Date Fair Value Number of Units Weighted Average Grant-Date Fair Value Units outstanding, beginning of year 1,226,088 $ 13.23 1,279,123 $ 9.67 582,212 $ 5.42 Granted 515,633 26.18 554,328 16.98 1,054,293 10.72 Released (487,951 ) 11.82 (432,706 ) 7.61 (257,693 ) 5.44 Forfeited (114,493 ) 16.72 (174,657 ) 13.08 (99,689 ) 6.86 Units outstanding, end of year 1,139,277 19.30 1,226,088 13.23 1,279,123 9.67 Aggregate intrinsic value at year end (in thousands) $ 19,698 Aggregate intrinsic value represents the Company’s closing stock price on the last trading day of the period, which was $17.29 per share at December 31, 2015 , multiplied by the number of restricted stock units. The fair value as of the respective vesting dates of RSUs that vested during the year ended December 31, 2015 was $12.2 million . Certain RSUs that vested in 2015 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 during 2015 were 54,182 and had a value of approximately $1.4 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. In 2015 , 2014 and 2013 , the Company granted approximately 49,000 , 140,000 and 270,000 performance-based RSUs, respectively (included in the table above). Certain of the performance-based RSUs outstanding as of December 31, 2015 can vest with a range of shares earned being between 0% and 200% of the targeted shares granted, depending on the final achievement of pre-determined performance criteria achieved as of the measurement date. As of December 31, 2015 , the performance criteria has been met for none of the 0.1 million performance-based RSUs outstanding. The Company recognized $1.5 million , $1.0 million and $1.4 million of compensation expense related to performance-based RSUs during the years ended December 2015 , 2014 and 2013 , respectively. f. Stock Option Activity The following table summarizes stock option activity for the years ended December 31: 2015 2014 2013 Number of Options Weighted Average Exercise Price Number of Options Weighted Average Exercise Price Number of Options Weighted Average Exercise Price Options outstanding, beginning of year 1,641,083 $ 5.26 3,365,692 $ 6.15 6,321,076 $ 6.05 Granted — — — — — — Exercised (525,180 ) 4.95 (1,644,146 ) 6.69 (2,671,058 ) 5.75 Expired / terminated (13,158 ) 7.27 (80,463 ) 16.59 (284,326 ) 7.83 Options outstanding, end of year 1,102,745 5.37 1,641,083 5.26 3,365,692 6.15 Options exercisable, end of year 1,072,145 5.39 1,605,789 5.27 3,217,146 6.22 Options expected to vest, end of year 25,000 4.75 No stock options were granted in 2015 , 2014 or 2013 . Total intrinsic value of options exercised was $13.6 million , $20.2 million and $15.7 million for the years ended December 31, 2015 , 2014 and 2013 , respectively. The intrinsic value for options exercised was calculated as the difference between the exercise price of the underlying stock option awards and the market price of the Company’s common stock on the date of exercise. The following table summarizes information about stock options outstanding and exercisable as of December 31, 2015 : Options Outstanding Options Exercisable Range of Exercise Price Number of Options Outstanding Weighted Average Exercise Price Weighted Average Remaining Contractual Life (Years) Number of Options Exercisable Weighted Average Price Weighted Average Remaining Contractual Life (Years) $4.00 - $5.00 783,598 $ 4.64 3.73 752,998 $ 4.63 3.76 $5.01 - $7.00 137,936 5.58 2.95 137,936 5.58 2.95 $7.01 - $10.00 113,322 7.24 2.20 113,322 7.24 2.20 $10.01 - $16.23 67,889 10.30 1.40 67,889 10.30 1.40 $4.00 - $16.23 1,102,745 5.37 3.33 1,072,145 5.39 3.34 The aggregate intrinsic value of options outstanding and options exercisable at December 31, 2015 , was $13.1 million and $12.8 million , respectively. 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 $17.29 on December 31, 2015 . At December 31, 2015 , the Company had 30,600 unvested options outstanding with a weighted average exercise price of $4.75 per share, weighted average grant-date fair value of $2.58 per share and weighted average remaining contractual life of 3.0 years . The aggregate intrinsic value of unvested options at December 31, 2015 was $0.4 million . The Company granted approximately 1.0 million performance-based stock options (included in the table above) from 2008 through 2011. As of December 31, 2015 , approximately 0.2 million performance-based stock options are outstanding, of which approximately 30,600 are unvested and 25,000 are expected to vest. The aggregate grant-date fair value of the 0.2 million performance-based stock options vested and expected to vest as of December 31, 2015 was approximately $0.6 million . During 2015, the Company determined that 25,000 performance-based stock options that were previously not expected to vest were now expected to vest, and the Company recorded approximately $0.1 million of expense related to these options during the year ended December 31, 2015 . The Company recognized no stock-based compensation expense related to performance-based stock options during the year ended December 31, 2014 and approximately $0.1 million during the year ended December 31, 2013 . g. Stock-based Compensation Expense The Company accounts for stock-based compensation using the fair-value method. Reported stock-based compensation was classified as follows for the years ended December 31 (in thousands): 2015 2014 2013 Cost of products sold and services delivered $ 402 $ 204 $ 175 Sales, general and administrative expenses 4,285 3,555 3,158 Research and development expenses 2,576 1,820 1,007 Total stock-based compensation $ 7,263 $ 5,579 $ 4,340 Total stock-based compensation expense recognized in the statements of operations for the years ended December 31, 2015 , 2014 and 2013 includes $0.1 million , $28,000 and $0.1 million , respectively, related to ISOs for which no tax benefit is recognized. The Company recorded a tax benefit in 2015 , 2014 , and 2013 of $0.2 million , $0.7 million , and $0.6 million , respectively, to offset taxes payable related to the non-qualified disposition of ISOs exercised and sold. For the years ended December 31, 2015 , 2014 and 2013 the provision for income taxes included $6.9 million , $8.0 million and $6.8 million , respectively, of tax expense resulting from the fact that stock-based compensation tax benefits have been recorded as increases to additional paid-in capital on the consolidated statements of changes in stockholders' equity. The total future tax benefits related to non-qualified and restricted stock units was $3.4 million and $3.1 million as of December 31, 2015 and 2014 , respectively. As of December 31, 2015 , there was $16.8 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 2.65 years .

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2015
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions The Company engages Mark Kroll, a member of the Board of Directors, to provide consulting services. The expenses related to these services were $0.2 million for each of the years ended December 31, 2015 , 2014 and 2013 . At December 31, 2015 and 2014 , the Company had accrued liabilities of approximately $31,000 and $8,000 , 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 Board of Directors. The Company licenses the software for approximately $80,000 per year. As of December 31, 2015 and 2014 the Company had prepaid subscription costs of approximately $36,000 and $20,000 , respectively. In connection with the acquisition of Tactical Safety Responses Limited (Note 15), the Company assumed two long-term non-cancellable operating leases for business premises with the former owners who are now employees of the Company. The leases have an average remaining contractual term 11.3 years and require aggregate annual rental payments of approximately $45,000 .

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2015
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. Contributions to the plans are made by both the employee and the Company. Company contributions are based on the level of employee contributions and are immediately vested. The Company’s matching contributions to the plan for the years ended December 31, 2015 , 2014 and 2013 , were approximately $1.2 million , $0.9 million and $0.7 million , respectively. 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 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. Subsequent to December 31, 2015 , the Company made contributions to the non-qualified deferred compensation plan related to the year ended December 31, 2015 , of approximately $40,000 . Future matching or profit sharing contributions to the plans are at the Company’s sole discretion.

Business Acquisitions

Business Acquisitions	12 Months Ended
	Dec. 31, 2015
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 will 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 also allow the Company to leverage MediaSolv’s existing network and relationships to further strengthen the Company's 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. The fair value of the contingent consideration liability was estimated using a discounted cash flow technique with significant inputs that are not observable in the market and thus represents a Level 3 fair value measurement as defined in ASC 820, Fair Value Measurements and Disclosures. The significant inputs in the Level 3 measurement not supported by market activity included primarily probability assessments related to the attainment of new customers during the earn-out period, appropriately discounted considering the uncertainties associated with the obligation. Subsequent to the date of acquisition, there was no significant change in the estimated fair value of the liability. The Company's purchase price allocation is preliminary and subject to revision as more detailed analyses are completed and additional information about fair value of assets and liabilities become available, including additional information relating to tax matters and finalization of the valuation of identifiable intangible assets. The major classes of assets and liabilities to which the Company has allocated the purchase price, on a preliminary basis, are as follows (in thousands): Accounts receivable and other current assets $ 590 Inventory 35 Property and equipment 53 Intangible assets 4,145 Goodwill 5,849 Accounts payable and accrued liabilities (697 ) Deferred revenue (111 ) Deferred income tax liabilities, net (1,041 ) 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 is the Company's licensed distributor of TASER CEWs and Axon cameras and related accessories in the 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. The acquired entity will operate under the name Axon Public Safety UK. The Company's purchase price allocation is preliminary and subject to revision as more detailed analyses are completed and additional information about fair value of assets and liabilities become available, including additional information relating to tax matters and finalization of the valuation of identifiable intangible assets. The major classes of assets and liabilities to which the Company has allocated the purchase price, on a preliminary basis, are as follows (in thousands): Accounts receivable $ 726 Inventory 497 Property and equipment 583 Other Assets 20 Intangible assets 881 Goodwill 1,608 Accounts payable and accrued liabilities (207 ) Notes payable (169 ) Income tax liabilities (605 ) 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.

Segment Data

Segment Data	12 Months Ended
	Dec. 31, 2015
Segment Reporting [Abstract]
Segment Data	Segment Data The Company’s operations are comprised of two reportable segments: the sale of CEWs, accessories and other products and services (the “TASER Weapons” segment); and the video business, which includes the TASER Cam, Axon video products and 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 video sales team, video product management expenses, video 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 chief operating decision maker 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): For the year ended December 31, 2015 TASER Weapons Axon Total Product sales $ 162,375 $ 22,855 $ 185,230 Service revenue — 12,662 12,662 Net sales 162,375 35,517 197,892 Cost of products sold 48,821 16,201 65,022 Cost of services delivered — 4,223 4,223 Gross margin 113,554 15,093 128,647 Sales, general and administrative 47,640 22,058 69,698 Research and development 4,470 19,144 23,614 Income (loss) from operations $ 61,444 $ (26,109 ) $ 35,335 Purchase of property and equipment $ 4,159 $ 1,844 $ 6,003 Purchase of intangible assets 277 224 501 Purchase of property and equipment and intangible assets in connection with business acquisitions (a) 1,536 11,583 13,119 Depreciation and amortization 2,311 980 3,291 (a) Total goodwill recorded in connection with business acquisitions during the year ended December 31, 2015 was $7.5 million . Of this amount, $0.8 million was assigned to the TASER Weapons segment and $6.7 million was assigned to the Axon segment. For the year ended December 31, 2014 TASER Axon Total Product sales $ 145,613 $ 14,700 $ 160,313 Service revenue — 4,212 4,212 Net sales 145,613 18,912 164,525 Cost of products sold 47,680 13,233 60,913 Cost of services delivered — 2,064 2,064 Gross margin 97,933 3,615 101,548 Sales, general and administrative 42,989 11,169 54,158 Research and development 3,872 11,013 14,885 Litigation judgment — — — Income (loss) from operations $ 51,072 $ (18,567 ) $ 32,505 Purchase of property and equipment $ 2,233 $ 272 $ 2,505 Purchase of intangible assets 180 3 183 Depreciation and amortization 3,936 381 4,317 For the year ended December 31, 2013 TASER Axon Total Product sales $ 127,474 $ 8,649 $ 136,123 Service revenue — 1,708 1,708 Net sales 127,474 10,357 137,831 Cost of products sold 44,025 6,074 50,099 Cost of services delivered — 1,889 1,889 Gross margin 83,449 2,394 85,843 Sales, general and administrative 40,174 6,383 46,557 Research and development 4,311 5,577 9,888 Litigation recovery 1,450 — 1,450 Income (loss) from operations $ 37,514 $ (9,566 ) $ 27,948 Purchase of property and equipment $ 1,324 $ 459 $ 1,783 Purchase of intangible assets 307 16 323 Depreciation and amortization 4,011 1,120 5,131

Selected Quarterly Financial Da

Selected Quarterly Financial Data (unaudited)	12 Months Ended
	Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Selected Quarterly Financial Data (unaudited)	Selected Quarterly Financial Data (unaudited) Selected quarterly financial data for years ended December 31, 2015 and 2014 follows (in thousands, except per share data): Quarter Ended March 31, June 30, September 30, December 31, 2015 2015 2015 2015 Net sales $ 44,762 $ 46,713 $ 50,376 $ 56,041 Gross margin 29,868 30,723 31,068 36,988 Net income 7,205 6,103 1,521 5,104 Earnings per share (1) : Basic $ 0.14 $ 0.11 $ 0.03 $ 0.10 Diluted $ 0.13 $ 0.11 $ 0.03 $ 0.09 Quarter Ended March 31, June 30, September 30, December 31, 2014 2014 2014 2014 Net sales $ 36,185 $ 37,175 $ 44,349 $ 46,816 Gross margin 22,208 23,214 28,713 27,413 Net income 3,391 3,883 7,558 5,086 Earnings per share (1) : Basic $ 0.06 $ 0.07 $ 0.14 $ 0.10 Diluted $ 0.06 $ 0.07 $ 0.14 $ 0.09 (1) Basic and diluted earnings per share are computed independently for each of the quarters presented. Therefore, the sum of quarterly basic and diluted per share information may not equal annual basic and diluted earnings per share.

Supplemental Disclosure to Cash

Supplemental Disclosure to Cash Flows	12 Months Ended
	Dec. 31, 2015
Supplemental Cash Flow Elements [Abstract]
Supplemental Disclosure to Cash Flows	Supplemental Disclosure to Cash Flows Supplemental non-cash and other cash flow information are as follows for the years ended December 31 (in thousands): 2015 2014 2013 Cash paid for income taxes, net of refunds $ 6,759 $ 386 $ 3,625 Non-cash transactions: Stock issued for business acquisition $ — $ — $ 1,578 Property and equipment purchases in accounts payable 315 270 279

Schedule II- Valuation and Qual

Schedule II- Valuation and Qualifying Accounts	12 Months Ended
	Dec. 31, 2015
Valuation and Qualifying Accounts [Abstract]
Schedule II- Valuation and Qualifying Accounts	SCHEDULE II – VALUATION AND QUALIFYING ACCOUNTS Description Balance at Beginning of Period Charged to Costs and Expenses Charged to Other Accounts Deductions Balance at End of Period Allowance for doubtful accounts: Year ended December 31, 2015 $ 251 $ 86 $ — $ (15 ) $ 322 Year ended December 31, 2014 200 142 — (91 ) 251 Year ended December 31, 2013 200 24 — (24 ) 200 Warranty reserve: Year ended December 31, 2015 $ 675 $ (62 ) $ — $ (299 ) $ 314 Year ended December 31, 2014 955 396 — (676 ) 675 Year ended December 31, 2013 484 1,001 — (530 ) 955

Organization and Summary of S26

Organization and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation and Use of Estimates	Basis of Presentation and Use of Estimates The accompanying consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America (“U.S. GAAP”). The preparation of these consolidated financial statements requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Significant estimates and assumptions in these 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.
Cash, Cash Equivalents and Investments	Cash, Cash Equivalents and Investments Cash, cash equivalents and investments include cash, money market funds, certificates of deposit, state and municipal obligations and corporate bonds. The Company places its cash and cash equivalents with high quality financial institutions. Although the Company deposits its cash with multiple financial institutions, its deposits, at times, may exceed federally insured limits. Cash and cash equivalents include funds on hand and highly liquid investments purchased with initial maturity of three months or less. Short-term investments include securities with an expected maturity date within one year of the balance sheet date that do not meet the definition of a cash equivalent, and long-term investments are securities with an expected maturity date greater than one year. Based on management’s intent and ability, the Company’s investments are classified as held to maturity investments and are recorded at amortized cost. Held-to-maturity investments are reviewed quarterly for impairment to determine if other-than-temporary declines in the carrying value have occurred for any individual investment. Other-than-temporary declines in the value of held-to-maturity investments are recorded as expense in the period the determination is made.
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 potentially excess, obsolete or slow-moving inventories to their net realizable value. These provisions are based on management’s best estimate after considering historical demand, projected future demand, inventory purchase commitments, industry and market trends and conditions and other factors. Management evaluates inventory costs for abnormal costs due to excess production capacity and treats such costs as period costs.
Property and Equipment	Property and Equipment Property and equipment are stated at cost, net of accumulated depreciation and amortization. Additions and improvements are capitalized, while ordinary maintenance and repair expenditures are charged to expense as incurred. Depreciation is calculated using the straight-line method over the estimated useful lives of the assets.
Software Development Costs	Software Development Costs The Company expenses software development costs, including costs to develop software products or the software component of products to be marketed to external users, before technological feasibility of such products is reached. The Company has determined that technological feasibility is reached shortly before the release of those products and as a result, the development costs incurred after the establishment of technological feasibility and before the release of those products are not material. Software development costs also include costs to develop software programs to be used solely to meet the Company's internal needs and cloud-based applications used to deliver its services. The Company capitalizes development costs related to these software applications once the preliminary project stage is complete and it is probable that the project will be completed and the software will be used to perform the intended function. Additionally, the Company capitalizes qualifying costs incurred for upgrades and enhancements to existing software that result in additional functionality. Costs related to preliminary project planning activities, post-implementation activities, maintenance and minor modifications are expensed as incurred. Internal-use software is amortized on a straight line basis over its estimated useful life. The capitalized development costs related to the Company’s software as a service (“SaaS”) product, Evidence.com, were fully amortized as of December 31, 2013. Amortization of capitalized software development costs was $0.6 million for the year ended December 31, 2013. Management evaluates the useful lives of these assets on an annual basis and tests for impairment whenever events or changes in circumstances occur that could impact the recoverability of these assets.
Valuation of Goodwill, Intangibles and Long-lived Assets	Valuation of Goodwill, Intangibles and Long-lived Assets The Company recorded goodwill related to the acquisitions of Tactical Safety Responses Limited, MediaSolv Solutions Corporation and Familiar, Inc. The recoverability of goodwill is evaluated and tested for impairment at least annually during the fourth quarter or more often, if and when circumstances indicate that goodwill may not be recoverable. Finite-lived intangible assets and other long-lived assets are amortized over their useful lives. Management evaluates whether events and circumstances have occurred that indicate the remaining estimated useful life of long-lived assets and intangible assets may warrant revision or that the remaining balance of these assets, including intangible assets with indefinite lives, may not be recoverable. Circumstances that might indicate long-lived assets might not be recoverable 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 the Company's products are branded and marketed. When performing a 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
Customer Deposits	Customer Deposits The Company requires deposits in advance of shipment for certain customer sales orders. Customer deposits are recorded as a current liability in the accompanying consolidated balance sheets.
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 at the end of the contract period. 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 typically 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 over the five -year 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 and pays the first of its 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. Sales tax collected on sales is netted against government remittances and thus, recorded on a net basis. Training revenue is recorded as the service is 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 7 for further disclosures about of 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 estimate and is based on their 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. The Company may, from time to time, enter into agreements with its customers to finance their purchases with a note receivable that may range in terms up to five years. Sales are recorded at the fair value of the note, which is generally sold and assigned to a third-party financing company. The terms of the assignments are such that the Company expects to receive payment within 30 days of the original sale. The assignments are non-recourse and the Company has no obligations or continuing involvement with the notes receivable. Prior to entering into an assignment, the Company evaluates the credit quality and financial condition of the third-party financing company. The Company does not generally record interest income on notes receivable due to minimal holding periods, nor has the Company recognized gains or losses upon the assignment of the notes
Cost of Products Sold and Services Provided	Cost of Products Sold and Services Provided Cost of products sold represents manufacturing costs, consisting of materials, labor and overhead related to finished goods and components. Shipping costs incurred related to product delivery are also included in cost of products sold. Cost of services delivered includes third party cloud services, and software maintenance and support costs, including personnel costs, associated with supporting Evidence.com.
Advertising Costs	Advertising Costs The Company expenses advertising costs in the period in which they are incurred. The Company incurred advertising costs of $0.6 million , $0.3 million and $0.2 million in the years ended December 31, 2015 , 2014 and 2013 , respectively. Advertising costs are included in sales, general and administrative expenses in the accompanying statements of operations.
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 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 consolidated balance sheets.
Research and Development Expenses	Research and Development Expenses The Company expenses as incurred research and development costs that do not meet the qualifications to be capitalized.
Income Taxes	Income Taxes Income taxes are accounted for under the asset and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement amounts of assets and liabilities and their respective tax bases and operating loss and tax credit carry forwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in future years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rate is recognized in income in the period that includes the enactment date. Deferred tax assets are reduced through the establishment of a valuation allowance if, based upon available evidence, it is determined that it is more likely than not that the deferred tax assets will not be realized. The Company recognizes the tax benefit from an uncertain tax position only if it is more likely than not that the tax position will be sustained on examination by the taxing authorities, based on the technical merits of the position. The tax benefits recognized in the consolidated financial statements from such a position are measured based on the largest benefit that has a greater than 50% likelihood of being realized upon ultimate resolution. Management also assesses whether uncertain tax positions, as filed, could result in the recognition of a liability for possible interest and penalties. The Company’s policy is to include interest and penalties related to unrecognized tax benefits as a component of income tax expense.
Concentration of Credit Risk and Major Customers / Suppliers	Concentration of Credit Risk and Major Customers / Suppliers Financial instruments that potentially subject the Company to concentrations of credit risk consist of accounts and notes receivable and cash. 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 losses. Uncollectible accounts are written off when deemed uncollectible, and accounts receivable are presented net of an allowance for doubtful accounts, which totaled $0.3 million as of December 31, 2015 and 2014 . Historically, the Company has experienced a low level of write-offs related to doubtful accounts. The Company maintains the majority of its cash and cash equivalents accounts at three depository institutions. As of December 31, 2015 , the aggregate balances in such accounts were $57.1 million . The Company’s balances with these institutions regularly exceed Federal Deposit Insurance Corporation (“FDIC”) insured limits for domestic deposits and various deposit insurance programs covering our deposits in the Netherlands, the United Kingdom and Germany. To manage the related credit exposure, management continually monitors the creditworthiness of the financial institutions where the Company has deposits. The Company sells some of its products through a network of unaffiliated distributors. The Company also reserves the right to sell directly to the end user to secure the customer’s account. In 2015 and 2014 , no customer represented more than 10% of total net sales. In 2013 one distributor represented 12.2% of total net sales with no other customers exceeding 10% . At December 31, 2015 and 2014 , the Company had a trade receivable from one unaffiliated customer comprising 12.5% and 13.4% , respectively, of the aggregate accounts receivable balance. The Company currently purchases finished circuit boards and injection-molded plastic components from suppliers located in the U.S., Mexico and Taiwan. Although the Company currently obtains many of these components from single source suppliers, the Company owns the injection molded component tooling used in their production. As a result, management believes it could obtain alternative suppliers in most cases without incurring significant production delays. The Company also purchases small, machined parts from a vendor in Taiwan, custom cartridge assemblies from a proprietary vendor in the U.S., and electronic components from a variety of foreign and domestic distributors. Management believes that there are readily available alternative suppliers in most cases who can consistently meet the Company's needs for these components. The Company acquires most of its components on a purchase order basis and does not have long-term contracts with suppliers.
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 December 31, 2015 and 2014 , 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 December 31, 2015 and 2014 was $2.2 million and $1.1 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 and accrued liabilities. Due to the short-term nature of these instruments, their fair values approximate their carrying values on the balance sheet.
Segment and Geographic Information	Segment and Geographic Information The Company is comprised of two reportable segments: the sale of CEWs, accessories and other products and services (the “TASER Weapons” segment); and the video business which includes the TASER Cam, Axon camera products and 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 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 16.
Sales to Customers Outside of the U.S.	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.
Stock-Based Compensation	Stock-Based Compensation The Company calculates the fair value of stock options using the Black-Scholes-Merton option pricing valuation model, which incorporates various assumptions including volatility, expected life and risk-free interest rates. No options were awarded during the years ended December 31, 2015 , 2014 or 2013 . The fair value of restricted stock units is estimated as the closing price of the Company's common stock on the date of grant. The estimated fair value of stock-based compensation awards is amortized to expense on a straight-line basis over the requisite 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.
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. Diluted income per share reflects the potential dilution that would occur if outstanding stock options were exercised utilizing the treasury stock method.
Recently Issued Accounting Guidance	Recently Issued Accounting Guidance In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2014-09, “Revenue from Contracts with Customers (Topic 606)” (“ASU 2014-09”). The core principle of ASU 2014-09 provides that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. This guidance also requires more detailed disclosures to enable users of financial statements to understand the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. The amendments are effective for annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period. The Company anticipates it will apply the guidance retrospectively to each prior period reported, and is evaluating the impact the adoption of this guidance will have on its financial position, results of operations and cash flows. In June 2014, the FASB issued ASU No. 2014-12, “Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could Be Achieved after the Requisite Service Period” (“ASU 2014-12”). The amendments in ASU 2014-12 require that a performance target that affects vesting and that could be achieved after the requisite service period be treated as a performance condition. A reporting entity should apply existing guidance in ASC Topic No. 718, “Compensation—Stock Compensation” (“ASC 718”) as it relates to awards with performance conditions that affect vesting to account for such awards. The amendments are effective for annual periods and interim periods within those annual periods beginning after December 15, 2015. 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 July 2015, the FASB issued ASU No. 2015-11, "Inventory (Topic 330)" ("ASU 2015-11"). 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 fiscal years beginning after December 15, 2016, including interim periods within those fiscal years. 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 September 2015, the FASB issued ASU No. 2015-16, "Business Combinations (Topic 805)" ("ASU 2015-16"). The amendments require that an acquirer recognize adjustments to provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined. The amendments require that the acquirer record, in the same period’s financial statements, the effect on earnings of changes in depreciation, amortization, or other income effects, if any, as a result of the change to the provisional amounts, calculated as if the accounting had been completed at the acquisition date. The amendments are effective for fiscal years beginning after December 15, 2015, including interim periods within those fiscal years. 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 November 2015, the FASB issued ASU No. 2015-17, “Income Taxes (Topic 740): Balance Sheet Classification of Deferred Taxes (“ASU 2015-17”). The standard requires that deferred tax assets and liabilities be classified as noncurrent on the balance sheet rather than being separated into current and noncurrent. ASU 2015-17 is effective for fiscal years, and interim periods within those years, beginning after December 15, 2016. Early adoption is permitted and the standard may be applied either retrospectively or on a prospective basis to all deferred tax assets and liabilities. The Company early adopted ASU 2015-17 during the fourth quarter of fiscal year 2015 on a retrospective basis. Accordingly, the Company reclassified the current deferred taxes to noncurrent on the Consolidated Balance Sheet as of December 31, 2014, which increased noncurrent deferred tax assets $5.2 million
Foreign Currency Translation	Foreign Currency Translation The Company’s foreign subsidiaries use their local currency as their functional currency. Assets and liabilities are translated at exchange rates in effect at the balance sheet date. Income and expense accounts are translated at the average monthly exchange rates during the year. Resulting translation adjustments are recorded as a component of accumulated other comprehensive income (loss) on the consolidated balance sheets
Reclassification of Prior Year Presentation	Reclassification of Prior Year Presentation Certain prior year amounts have been reclassified for consistency with the current year presentation

Organization and Summary of S27

Organization and Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Summary of Changes in Estimated Product Warranty Liabilities	Changes in the Company’s estimated product warranty liabilities were as follows (in thousands): 2015 2014 2013 Balance, January 1 $ 675 $ 955 $ 484 Utilization of accrual (299 ) (676 ) (530 ) Warranty (recoveries) expense (62 ) 396 1,001 Balance, December 31 $ 314 $ 675 $ 955
Net Sales by Geographic Area	For the three years ended December 31, 2015 , 2014 and 2013 , net sales by geographic area were as follows (in thousands): Year Ended December 31, 2015 2014 2013 United States $ 161,803 81.8 % $ 132,205 80.4 % $ 115,674 83.9 % Other Countries 36,089 18.2 32,320 19.6 22,157 16.1 Total $ 197,892 100.0 % $ 164,525 100.0 % $ 137,831 100.0 %
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): For the Year Ended December 31, 2015 2014 2013 Numerator for basic and diluted earnings per share: Net income $ 19,933 $ 19,918 $ 18,244 Denominator: Weighted average shares outstanding—basic 53,548 52,948 51,880 Dilutive effect of stock-based awards 1,090 1,552 2,272 Diluted weighted average shares outstanding 54,638 54,500 54,152 Anti-dilutive stock-based awards excluded 198 177 507 Net income per common share: Basic $ 0.37 $ 0.38 $ 0.35 Diluted $ 0.36 $ 0.37 $ 0.34

Cash, Cash Equivalents and In28

Cash, Cash Equivalents and Investments (Tables)	12 Months Ended
	Dec. 31, 2015
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 December 31 (in thousands): 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 As of December 31, 2014 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value Cash and Cash Equivalents Short-Term Investments Long-Term Investments Cash $ 44,260 $ — $ — $ 44,260 $ 44,260 $ — $ — Level 1: Money market funds 3,932 — — 3,932 3,932 — — Corporate bonds 20,388 — (34 ) 20,354 — 15,656 4,732 Subtotal 24,320 — (34 ) 24,286 3,932 15,656 4,732 Level 2: State and municipal obligations 19,145 18 — 19,163 175 15,891 3,079 Certificates of deposit 2,712 — — 2,712 — 1,227 1,485 Subtotal 21,857 18 — 21,875 175 17,118 4,564 Total $ 90,437 $ 18 $ (34 ) $ 90,421 $ 48,367 $ 32,774 $ 9,296
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 December 31, 2015 by contractual maturity (in thousands): Amortized Cost Fair Value Due in less than one year $ 50,254 $ 50,190 Due after one year, through two years 8,525 8,521 Due after two years — — Total short-term and long-term investments $ 58,779 $ 58,711

Inventory (Tables)

Inventory (Tables)	12 Months Ended
	Dec. 31, 2015
Inventory Disclosure [Abstract]
Inventory	Inventories consisted of the following at December 31 (in thousands): 2015 2014 Raw materials $ 8,748 $ 11,031 Work-in-process 105 111 Finished goods 6,910 7,181 Total inventory $ 15,763 $ 18,323

Property and Equipment (Tables)

Property and Equipment (Tables)	12 Months Ended
	Dec. 31, 2015
Property, Plant and Equipment [Abstract]
Summary of Property and Equipment	Property and equipment consisted of the following at December 31 (in thousands): Estimated Useful Life 2015 2014 Land N/A $ 2,900 $ 2,900 Building and leasehold improvements 3-39 years 15,246 14,302 Production equipment 3-7 years 18,689 18,443 Computer equipment 3-5 years 8,048 7,209 Furniture and office equipment 5-7 years 4,116 3,066 Vehicles 5 years 713 270 Website development costs 3 years 601 601 Capitalized software development costs 3 years 3,670 3,670 Construction-in-process N/A 3,885 968 Total cost 57,868 51,429 Less: Accumulated depreciation (36,020 ) (33,906 ) Property and equipment, net $ 21,848 $ 17,523

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill	The changes in the carrying amount of goodwill for the year ended December 31, 2015 were as follows (in thousands): Balance, January 1, 2015 $ 2,206 Goodwill acquired 7,390 Balance, December 31, 2015 $ 9,596
Intangible Assets Other than goodwill	Intangible assets (other than goodwill) consisted of the following (in thousands): December 31, 2015 December 31, 2014 Useful Life Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Amortized: Domain names 5 years $ 125 $ (120 ) $ 5 $ 125 $ (114 ) $ 11 Issued patents 4-15 years 1,866 (659 ) 1,207 1,759 (549 ) 1,210 Issued trademarks 3-11 years 603 (255 ) 348 566 (205 ) 361 Customer relationships 4-8 years 1,035 (93 ) 942 — — — Non-compete agreements 3-4 years 464 (164 ) 300 — — — Developed technology 7 years 3,470 (326 ) 3,144 — — — Total amortized 7,563 (1,617 ) 5,946 2,450 (868 ) 1,582 Not amortized: TASER trademark 900 900 900 900 Patents and trademarks pending 742 742 633 633 Total not amortized 1,642 1,642 1,533 1,533 Total intangible assets $ 9,205 $ (1,617 ) $ 7,588 $ 3,983 $ (868 ) $ 3,115
Estimated Amortization Expense of Intangible Assets	Estimated amortization for intangible assets with definitive lives for the next five years is as follows for the years ended December 31 (in thousands): 2016 $ 942 2017 938 2018 925 2019 803 2020 741 Thereafter 1,597 Total $ 5,946

Other Long-Term Assets (Tables)

Other Long-Term Assets (Tables)	12 Months Ended
	Dec. 31, 2015
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Schedule of other long-term assets	Other long-term assets consisted of the following at December 31 (in thousands): 2015 2014 Cash surrender value of corporate-owned life insurance policies (Note 1) $ 2,180 $ 1,080 Prepaid commissions (i) 3,543 1,058 Accounts receivable (ii) 1,227 — Prepaid expenses, deposits and other 246 385 Total other long-term assets $ 7,196 $ 2,523 (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 December 31, 2015 consist of balances related to sales made under the Officer Safety Program (Note 1h). These balances are collectible over the stated contract period, which is typically five years, and are actively monitored for collectability.

Deferred Revenue (Tables)

Deferred Revenue (Tables)	12 Months Ended
	Dec. 31, 2015
Deferred Revenue Disclosure [Abstract]
Summary of Deferred Revenue	Deferred revenue consisted of the following at December 31 (in thousands): December 31, 2015 December 31, 2014 Current Long-Term Total Current Long-Term Total Warranty: TASER Weapons $ 7,278 $ 13,982 $ 21,260 $ 6,591 $ 13,809 $ 20,400 Axon 2,332 2,344 4,676 679 894 1,573 9,610 16,326 25,936 7,270 14,703 21,973 Hardware: TASER Weapons 952 2,459 3,411 365 753 1,118 Axon 786 7,382 8,168 491 2,643 3,134 1,738 9,841 11,579 856 3,396 4,252 Axon Services 9,303 4,023 13,326 5,717 3,569 9,286 Other 200 — 200 177 — 177 Total $ 20,851 $ 30,190 $ 51,041 $ 14,020 $ 21,668 $ 35,688 December 31, 2015 December 31, 2014 Current Long-Term Total Current Long-Term Total TASER Weapons and other $ 8,430 $ 16,441 $ 24,871 $ 7,133 $ 14,562 $ 21,695 Axon 12,421 13,749 26,170 6,887 7,106 13,993 Total $ 20,851 $ 30,190 $ 51,041 $ 14,020 $ 21,668 $ 35,688

Accrued Liabilities (Tables)

Accrued Liabilities (Tables)	12 Months Ended
	Dec. 31, 2015
Payables and Accruals [Abstract]
Accrued Liabilities	Accrued liabilities consisted of the following at December 31 (in thousands): 2015 2014 Accrued salaries and benefits $ 3,637 $ 3,699 Accrued judgments and settlements 65 108 Accrued professional fees 718 257 Accrued warranty expense 314 675 Accrued income and other taxes 1,215 539 Other accrued expenses 2,694 3,967 Accrued liabilities $ 8,643 $ 9,245

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Future Minimum Lease Payments Under Non-Cancelable Leases	Future minimum lease payments under non-cancelable leases at December 31, 2015 , are as follows (in thousands): Operating Capital 2016 $ 771 $ 30 2017 776 — 2018 702 — 2019 474 — 2020 484 — Thereafter 1,112 — Total minimum lease payments $ 4,319 30 Less: Amount representing interest (1 ) Capital lease obligation $ 29
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 Thompson Mar-10 11th Judicial Circuit Court, Miami-Dade County, FL Suspect Injury During Arrest 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, Manatee 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 Discover Phase - Trial scheduled July 2016 Llach Sep-15 11th Judicial Circuit Court, Miami-Dade County, FL Wrongful Death Discovery Phase Bennett Sep-15 11th Judicial Circuit Court, Miami-Dade County, FL Wrongful Death Discovery Phase
Summary of Cases Dismissed or Judgment Entered	Plaintiff Month Served Jurisdiction Claim Type Status Koon Dec-08 17th Judicial Circuit Court, Broward County, FL Training Injury Dismissed Moore Nov-14 St. Louis County Circuit Court, MO Wrongful Death Dismissed Jones Jan-15 Los Angeles County Superior Court, CA Suspect Injury Dismissed McKelvey Apr-15 US District Court, OR Wrongful Death Dismissed Price Jul-15 US District Court, OR Wrongful Death Dismissed Mitchell Apr-12 US District Court, ED MI Wrongful Death Company won appeal with three judge panel, Plaintiff's petition for full Court of Appeals review denied Demery Aug-15 US District Court, WD LA Wrongful Death Dismissed
Information Regarding the Company's Insurance Coverage	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 2004 12/1/2003 12/1/2004 $ 2.0 $ 0.1 N $ 2.0 n/a 2005 12/1/2004 12/1/2005 10.0 0.3 Y 7.0 n/a 2006 12/1/2005 12/1/2006 10.0 0.3 Y 3.7 n/a 2007 12/1/2006 12/1/2007 10.0 0.3 Y 8.0 n/a 2008 12/1/2007 12/15/2008 10.0 0.5 Y — n/a 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 Thompson, 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 Llach, Bennett

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Components of Deferred Income Tax Assets and Liabilities	Significant components of the Company’s deferred income tax assets and liabilities are as follows at December 31 (in thousands): 2015 2014 Deferred income tax assets: Net operating loss carryforward $ 649 $ 343 Deferred revenue 6,762 4,141 Deferred compensation 1,252 423 Inventory reserve 956 508 Non-qualified and non-employee stock option expense 3,393 3,094 Capitalized research and development 3,348 4,847 Alternative minimum tax carryforward — 1,081 Research and development tax credit carryforward 2,386 2,139 Reserves, accruals, and other 1,067 1,897 Total deferred income tax assets 19,813 18,473 Deferred income tax liabilities: Depreciation (2,228 ) (1,674 ) Amortization (1,979 ) (236 ) Other (187 ) — Total deferred income tax liabilities (4,394 ) (1,910 ) Net deferred income tax assets before valuation allowance 15,419 16,563 Valuation allowance (1,700 ) (500 ) Net deferred income tax assets $ 13,719 $ 16,063
Significant Components of the Provision for Income Taxes	Significant components of the provision for income taxes are as follows for the years ended December 31 (in thousands): 2015 2014 2013 Current: Federal $ 13,594 $ 7,793 $ 7,963 State 996 800 987 Total current 14,590 8,593 8,950 Deferred: Federal 288 2,656 764 State 984 942 (143 ) Foreign (278 ) — — Total deferred 994 3,598 621 Tax provision recorded as an increase in liability for unrecorded tax benefits (156 ) 202 219 Provision for income taxes $ 15,428 $ 12,393 $ 9,790
Reconciliation of the Company's Effective Income Tax Rate to the Federal Statutory Rate	A reconciliation of the Company’s effective income tax rate to the federal statutory rate follows for the years ended December 31 (in thousands): 2015 2014 2013 Federal income tax at the statutory rate $ 12,347 $ 11,236 $ 9,812 State income taxes, net of federal benefit 1,061 1,433 1,283 Difference between statutory and foreign tax rates (i) 2,442 — — Permanent differences (ii) (205 ) 98 (96 ) Research and development (1,050 ) (452 ) (386 ) Return to provision adjustment (67 ) 28 (361 ) Change in liability for unrecognized tax benefits (156 ) 202 219 Incentive stock option benefit (144 ) (616 ) (538 ) Change in valuation allowance 1,200 500 — Other — (36 ) (143 ) Provision for income taxes $ 15,428 $ 12,393 $ 9,790 Effective tax rate 43.6 % 38.4 % 34.9 % (i) The difference between statutory and foreign tax rates of $2.4 million was largely driven by losses incurred in a newly formed foreign entity for which no tax benefit will be realized, partially reduced by a tax benefit for newly formed foreign entities for which the statutory tax rate is lower than the U.S. statutory tax rate. (ii) Permanent differences include certain expenses that are not deductible for tax purposes including lobbying fees as well as favorable items including the domestic production activities deduction
Roll Forward of Liability for Unrecognized Tax Benefits Exclusive of Accrued Interest	The following table presents a roll forward of the Company's liability for unrecognized tax benefits, exclusive of accrued interest, as of December 31 (in thousands): 2015 2014 2013 Balance, beginning of period $ 3,325 $ 3,110 $ 2,903 (Decrease) increase in previous year tax positions (389 ) — 57 Increase in current year tax positions 270 121 144 Decrease due to lapse of statute of limitations (14 ) — — Increase related to adjustment of previous estimates of activity 204 94 6 Balance, end of period $ 3,396 $ 3,325 $ 3,110

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2015
Equity [Abstract]
Summary of Restricted Stock Unit Activity	The following table summarizes RSU activity for the years ended December 31: 2015 2014 2013 Number of Units Weighted Average Grant-Date Fair Value Number of Units Weighted Average Grant-Date Fair Value Number of Units Weighted Average Grant-Date Fair Value Units outstanding, beginning of year 1,226,088 $ 13.23 1,279,123 $ 9.67 582,212 $ 5.42 Granted 515,633 26.18 554,328 16.98 1,054,293 10.72 Released (487,951 ) 11.82 (432,706 ) 7.61 (257,693 ) 5.44 Forfeited (114,493 ) 16.72 (174,657 ) 13.08 (99,689 ) 6.86 Units outstanding, end of year 1,139,277 19.30 1,226,088 13.23 1,279,123 9.67 Aggregate intrinsic value at year end (in thousands) $ 19,698
Summary of the Company's Stock Options Activity	The following table summarizes stock option activity for the years ended December 31: 2015 2014 2013 Number of Options Weighted Average Exercise Price Number of Options Weighted Average Exercise Price Number of Options Weighted Average Exercise Price Options outstanding, beginning of year 1,641,083 $ 5.26 3,365,692 $ 6.15 6,321,076 $ 6.05 Granted — — — — — — Exercised (525,180 ) 4.95 (1,644,146 ) 6.69 (2,671,058 ) 5.75 Expired / terminated (13,158 ) 7.27 (80,463 ) 16.59 (284,326 ) 7.83 Options outstanding, end of year 1,102,745 5.37 1,641,083 5.26 3,365,692 6.15 Options exercisable, end of year 1,072,145 5.39 1,605,789 5.27 3,217,146 6.22 Options expected to vest, end of year 25,000 4.75
Summary of Stock Options Outstanding and Exercisable	The following table summarizes information about stock options outstanding and exercisable as of December 31, 2015 : Options Outstanding Options Exercisable Range of Exercise Price Number of Options Outstanding Weighted Average Exercise Price Weighted Average Remaining Contractual Life (Years) Number of Options Exercisable Weighted Average Price Weighted Average Remaining Contractual Life (Years) $4.00 - $5.00 783,598 $ 4.64 3.73 752,998 $ 4.63 3.76 $5.01 - $7.00 137,936 5.58 2.95 137,936 5.58 2.95 $7.01 - $10.00 113,322 7.24 2.20 113,322 7.24 2.20 $10.01 - $16.23 67,889 10.30 1.40 67,889 10.30 1.40 $4.00 - $16.23 1,102,745 5.37 3.33 1,072,145 5.39 3.34
Reported Share-Based Compensation	The Company accounts for stock-based compensation using the fair-value method. Reported stock-based compensation was classified as follows for the years ended December 31 (in thousands): 2015 2014 2013 Cost of products sold and services delivered $ 402 $ 204 $ 175 Sales, general and administrative expenses 4,285 3,555 3,158 Research and development expenses 2,576 1,820 1,007 Total stock-based compensation $ 7,263 $ 5,579 $ 4,340

Business Acquisitions (Tables)

Business Acquisitions (Tables)	12 Months Ended
	Dec. 31, 2015
Business Combinations [Abstract]
Schedule of Allocation of Purchase Price	The major classes of assets and liabilities to which the Company has allocated the purchase price, on a preliminary basis, are as follows (in thousands): Accounts receivable and other current assets $ 590 Inventory 35 Property and equipment 53 Intangible assets 4,145 Goodwill 5,849 Accounts payable and accrued liabilities (697 ) Deferred revenue (111 ) Deferred income tax liabilities, net (1,041 ) Total purchase price $ 8,823 The major classes of assets and liabilities to which the Company has allocated the purchase price, on a preliminary basis, are as follows (in thousands): Accounts receivable $ 726 Inventory 497 Property and equipment 583 Other Assets 20 Intangible assets 881 Goodwill 1,608 Accounts payable and accrued liabilities (207 ) Notes payable (169 ) Income tax liabilities (605 ) Total purchase price $ 3,334

Segment Data (Tables)

Segment Data (Tables)	12 Months Ended
	Dec. 31, 2015
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): For the year ended December 31, 2015 TASER Weapons Axon Total Product sales $ 162,375 $ 22,855 $ 185,230 Service revenue — 12,662 12,662 Net sales 162,375 35,517 197,892 Cost of products sold 48,821 16,201 65,022 Cost of services delivered — 4,223 4,223 Gross margin 113,554 15,093 128,647 Sales, general and administrative 47,640 22,058 69,698 Research and development 4,470 19,144 23,614 Income (loss) from operations $ 61,444 $ (26,109 ) $ 35,335 Purchase of property and equipment $ 4,159 $ 1,844 $ 6,003 Purchase of intangible assets 277 224 501 Purchase of property and equipment and intangible assets in connection with business acquisitions (a) 1,536 11,583 13,119 Depreciation and amortization 2,311 980 3,291 (a) Total goodwill recorded in connection with business acquisitions during the year ended December 31, 2015 was $7.5 million . Of this amount, $0.8 million was assigned to the TASER Weapons segment and $6.7 million was assigned to the Axon segment. For the year ended December 31, 2014 TASER Axon Total Product sales $ 145,613 $ 14,700 $ 160,313 Service revenue — 4,212 4,212 Net sales 145,613 18,912 164,525 Cost of products sold 47,680 13,233 60,913 Cost of services delivered — 2,064 2,064 Gross margin 97,933 3,615 101,548 Sales, general and administrative 42,989 11,169 54,158 Research and development 3,872 11,013 14,885 Litigation judgment — — — Income (loss) from operations $ 51,072 $ (18,567 ) $ 32,505 Purchase of property and equipment $ 2,233 $ 272 $ 2,505 Purchase of intangible assets 180 3 183 Depreciation and amortization 3,936 381 4,317 For the year ended December 31, 2013 TASER Axon Total Product sales $ 127,474 $ 8,649 $ 136,123 Service revenue — 1,708 1,708 Net sales 127,474 10,357 137,831 Cost of products sold 44,025 6,074 50,099 Cost of services delivered — 1,889 1,889 Gross margin 83,449 2,394 85,843 Sales, general and administrative 40,174 6,383 46,557 Research and development 4,311 5,577 9,888 Litigation recovery 1,450 — 1,450 Income (loss) from operations $ 37,514 $ (9,566 ) $ 27,948 Purchase of property and equipment $ 1,324 $ 459 $ 1,783 Purchase of intangible assets 307 16 323 Depreciation and amortization 4,011 1,120 5,131

Selected Quarterly Financial 40

Selected Quarterly Financial Data (unaudited) (Tables)	12 Months Ended
	Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Selected Quarterly Financial Data	Selected quarterly financial data for years ended December 31, 2015 and 2014 follows (in thousands, except per share data): Quarter Ended March 31, June 30, September 30, December 31, 2015 2015 2015 2015 Net sales $ 44,762 $ 46,713 $ 50,376 $ 56,041 Gross margin 29,868 30,723 31,068 36,988 Net income 7,205 6,103 1,521 5,104 Earnings per share (1) : Basic $ 0.14 $ 0.11 $ 0.03 $ 0.10 Diluted $ 0.13 $ 0.11 $ 0.03 $ 0.09 Quarter Ended March 31, June 30, September 30, December 31, 2014 2014 2014 2014 Net sales $ 36,185 $ 37,175 $ 44,349 $ 46,816 Gross margin 22,208 23,214 28,713 27,413 Net income 3,391 3,883 7,558 5,086 Earnings per share (1) : Basic $ 0.06 $ 0.07 $ 0.14 $ 0.10 Diluted $ 0.06 $ 0.07 $ 0.14 $ 0.09 (1) Basic and diluted earnings per share are computed independently for each of the quarters presented. Therefore, the sum of quarterly basic and diluted per share information may not equal annual basic and diluted earnings per share.

Supplemental Disclosure to Ca41

Supplemental Disclosure to Cash Flows (Tables)	12 Months Ended
	Dec. 31, 2015
Supplemental Cash Flow Elements [Abstract]
Summary of Supplemental Non-Cash and Other Cash Flow Information	Supplemental non-cash and other cash flow information are as follows for the years ended December 31 (in thousands): 2015 2014 2013 Cash paid for income taxes, net of refunds $ 6,759 $ 386 $ 3,625 Non-cash transactions: Stock issued for business acquisition $ — $ — $ 1,578 Property and equipment purchases in accounts payable 315 270 279

Organization and Summary of S42

Organization and Summary of Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2015USD ($)SegmentSourceDepositoryCustomer	Dec. 31, 2014USD ($)DistributorCustomer	Dec. 31, 2013USD ($)Distributor	Dec. 31, 2012
Summary Of Significant Accounting Policy [Line Items]
Number of revenue sources | Source	2
Note receivable in term (up to)	5 years
Days within the original sale during which Company expects to receive payment	30 days
Accounts and notes receivable related to purchases	$ 0	$ 0
Advertising cost	$ 600,000	300,000	$ 200,000
Warranty period	1 year
Research and development costs	$ 23,614,000	14,885,000	$ 9,888,000
Allowance for doubtful accounts	$ 322,000	$ 251,000
Number of depository institutions | Depository	3
Aggregate balances in depository institution accounts	$ 57,100,000
Number of customers | Customer	0	0
Unaffiliated distributors | Distributor		1	1
Percentage of total net sales represented	10.00%	10.00%	10.00%
Accounts and notes receivable by customers one	12.50%	13.40%
Unaffiliated customers | Customer	1
Corporate owned life insurance policies fair value	$ 2,180,000	$ 1,080,000
Number of reportable segments of company | Segment	2
Reclassification of deferred tax assets to noncurrent	$ 13,719,000	16,063,000
New Accounting Pronouncement, Early Adoption, Effect
Summary Of Significant Accounting Policy [Line Items]
Reclassification of deferred tax assets to noncurrent		$ 5,200,000
Sales
Summary Of Significant Accounting Policy [Line Items]
Percentage of total net sales represented			12.20%
Minimum
Summary Of Significant Accounting Policy [Line Items]
Service term for services purchased	1 year			3 years
Maximum
Summary Of Significant Accounting Policy [Line Items]
Service term for services purchased	5 years			5 years
Evidence. Com
Summary Of Significant Accounting Policy [Line Items]
Amortization of capitalized software development costs			$ 600,000
Service term for services purchased	2 years 6 months
Extended Product Warranty
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]
Period of extended warranty after expiration of standard warranty	1 year
Extended Product Warranty | Maximum
Summary Of Significant Accounting Policy [Line Items]
Period of extended warranty after expiration of standard warranty	5 years

Organization and Summary of S43

Organization and Summary of Significant Accounting Policies - Summary of Changes in Estimated Product Warranty Liabilities (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Balance, January 1	$ 675	$ 955	$ 484
Utilization of accrual	(299)	(676)	(530)
Warranty (recoveries) expense	(62)	396	1,001
Balance, December 31	$ 314	$ 675	$ 955

Organization and Summary of S44

Organization and Summary of Significant Accounting Policies - Net Sales by Geographic Area (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Net sales by geographic area	$ 197,892	$ 164,525	$ 137,831
Percentage of net sales by geographic area	100.00%	100.00%	100.00%
United States
Segment Reporting Information [Line Items]
Net sales by geographic area	$ 161,803	$ 132,205	$ 115,674
Percentage of net sales by geographic area	81.80%	80.40%	83.90%
Other Countries
Segment Reporting Information [Line Items]
Net sales by geographic area	$ 36,089	$ 32,320	$ 22,157
Percentage of net sales by geographic area	18.20%	19.60%	16.10%

Organization and Summary of S45

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								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Numerator for basic and diluted earnings per share:
Net income	$ 5,104	$ 1,521	$ 6,103	$ 7,205	$ 5,086	$ 7,558	$ 3,883	$ 3,391	$ 19,933	$ 19,918	$ 18,244
Denominator:
Weighted average shares outstanding—basic									53,548	52,948	51,880
Dilutive effect of stock-based awards (in shares)									1,090	1,552	2,272
Diluted weighted average shares outstanding									54,638	54,500	54,152
Anti-dilutive stock-based awards excluded (in shares)									198	177	507
Net income (loss) per common share:
Basic (in dollars per share)	$ 0.10	$ 0.03	$ 0.11	$ 0.14	$ 0.10	$ 0.14	$ 0.07	$ 0.06	$ 0.37	$ 0.38	$ 0.35
Diluted (in dollars per share)	$ 0.09	$ 0.03	$ 0.11	$ 0.13	$ 0.09	$ 0.14	$ 0.07	$ 0.06	$ 0.36	$ 0.37	$ 0.34

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	Dec. 31, 2015	Dec. 31, 2014
Restricted Cash and Cash Equivalents Items [Line Items]
Amortized Cost	$ 118,305	$ 90,437
Gross Unrealized Gains	11	18
Gross Unrealized Losses	(79)	(34)
Fair Value	118,237	90,421
Cash and Cash Equivalents	59,526	48,367
Short-term investments	50,254	32,774
Long-term investments	8,525	9,296
State and municipal obligations
Restricted Cash and Cash Equivalents Items [Line Items]
Amortized Cost	19,002	19,145
Gross Unrealized Gains	11	18
Gross Unrealized Losses	(9)	0
Fair Value	19,004	19,163
Cash and Cash Equivalents	0	175
Short-term investments	12,000	15,891
Long-term investments	7,002	3,079
Certificates of deposit
Restricted Cash and Cash Equivalents Items [Line Items]
Amortized Cost	3,371	2,712
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	3,371	2,712
Cash and Cash Equivalents	0	0
Short-term investments	2,577	1,227
Long-term investments	794	1,485
Level 1
Restricted Cash and Cash Equivalents Items [Line Items]
Amortized Cost	38,795	24,320
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(70)	(34)
Fair Value	38,725	24,286
Cash and Cash Equivalents	2,389	3,932
Short-term investments	35,677	15,656
Long-term investments	729	4,732
Level 2
Restricted Cash and Cash Equivalents Items [Line Items]
Amortized Cost	22,373	21,857
Gross Unrealized Gains	11	18
Gross Unrealized Losses	(9)	0
Fair Value	22,375	21,875
Cash and Cash Equivalents	0	175
Short-term investments	14,577	17,118
Long-term investments	7,796	4,564
Cash
Restricted Cash and Cash Equivalents Items [Line Items]
Amortized Cost	57,137	44,260
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	57,137	44,260
Cash and Cash Equivalents	57,137	44,260
Short-term investments	0	0
Long-term investments	0	0
Money market funds
Restricted Cash and Cash Equivalents Items [Line Items]
Amortized Cost	2,389	3,932
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	2,389	3,932
Cash and Cash Equivalents	2,389	3,932
Short-term investments	0	0
Long-term investments	0	0
Corporate bonds
Restricted Cash and Cash Equivalents Items [Line Items]
Amortized Cost	36,406	20,388
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(70)	(34)
Fair Value	36,336	20,354
Cash and Cash Equivalents	0	0
Short-term investments	35,677	15,656
Long-term investments	$ 729	$ 4,732

Cash, Cash Equivalents, and I47

Cash, Cash Equivalents, and Investments - Summary of Amortized Cost and Fair Value of Short-term and Long-term Investments (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Due in less than one year	$ 50,254	$ 32,774
Due after one year, through two years	8,525	$ 9,296
Amortized Cost
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Due in less than one year	50,254
Due after one year, through two years	8,525
Due after two years	0
Total short-term and long-term investments	58,779
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Due in less than one year	50,190
Due after one year, through two years	8,521
Due after two years	0
Total short-term and long-term investments	$ 58,711

Inventory (Detail)

Inventory (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Inventory Disclosure [Abstract]
Raw materials	$ 8,748	$ 11,031
Work-in-process	105	111
Finished goods	6,910	7,181
Total inventory	$ 15,763	$ 18,323

Property and Equipment - Additi

Property and Equipment - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Abstract]
(Loss) gain for write-down and disposal of property and equipment, net	$ 19	$ (17)	$ 27
Depreciation and amortization expense relative to property and equipment	2,300	4,000	4,800
Cost of products sold and services provided	$ 700	$ 2,800	$ 3,700

Property and Equipment - Summar

Property and Equipment - Summary of Property and Equipment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Total cost	$ 57,868	$ 51,429
Less: Accumulated depreciation	(36,020)	(33,906)
Property and equipment, net	21,848	17,523
Land
Property, Plant and Equipment [Line Items]
Total cost	2,900	2,900
Building and Leasehold Improvements
Property, Plant and Equipment [Line Items]
Total cost	$ 15,246	14,302
Building and Leasehold Improvements | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Life	3 years
Building and Leasehold Improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Life	39 years
Production Equipment
Property, Plant and Equipment [Line Items]
Total cost	$ 18,689	18,443
Production Equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Life	3 years
Production Equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Life	7 years
Computer Equipment
Property, Plant and Equipment [Line Items]
Total cost	$ 8,048	7,209
Computer Equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Life	3 years
Computer Equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Life	5 years
Furniture and Office Equipment
Property, Plant and Equipment [Line Items]
Total cost	$ 4,116	3,066
Furniture and Office Equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Life	5 years
Furniture and Office Equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Life	7 years
Vehicles
Property, Plant and Equipment [Line Items]
Estimated Useful Life	5 years
Total cost	$ 713	270
Website Development Costs
Property, Plant and Equipment [Line Items]
Estimated Useful Life	3 years
Total cost	$ 601	601
Capitalized Software Development Costs
Property, Plant and Equipment [Line Items]
Estimated Useful Life	3 years
Total cost	$ 3,670	3,670
Construction-in-Process
Property, Plant and Equipment [Line Items]
Total cost	$ 3,885	$ 968

Goodwill and Intangible Asset51

Goodwill and Intangible Assets - Changes in Carrying Amount of Goodwill (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2015USD ($)
Changes in carrying amount of goodwill
Balance, January 1, 2015	$ 2,206
Goodwill acquired	7,390
Balance, December 31, 2015	$ 9,596

Goodwill and Intangible Asset52

Goodwill and Intangible Assets - Intangible Assets Other than Goodwill (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Acquired Indefinite-lived Intangible Assets [Line Items]
Amortized intangible assets, gross carrying amount	$ 7,563	$ 2,450
Accumulated amortization	(1,617)	(868)
Total	5,946	1,582
Not amortized intangible assets, carrying amount	1,642	1,533
Intangible assets, gross carrying amount	9,205	3,983
Intangible assets, net carrying amount	7,588	3,115
Amortization of Intangible Assets	800	200	$ 200
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	$ 742	633
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	(120)	(114)
Total	5	11
Issued patents
Acquired Indefinite-lived Intangible Assets [Line Items]
Amortized intangible assets, gross carrying amount	1,866	1,759
Accumulated amortization	(659)	(549)
Total	$ 1,207	1,210
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	$ 603	566
Accumulated amortization	(255)	(205)
Total	$ 348	361
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	$ 1,035	0
Accumulated amortization	(93)	0
Total	$ 942	0
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	$ 464	0
Accumulated amortization	(164)	0
Total	$ 300	0
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	0
Accumulated amortization	(326)	0
Total	$ 3,144	$ 0

Goodwill and Intangible asset53

Goodwill and Intangible assets - Estimated Amortization Expense of Intangible Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
2,016	$ 942
2,017	938
2,018	925
2,019	803
2,020	741
Thereafter	1,597
Total	$ 5,946	$ 1,582

Other Long-Term Assets (Details

Other Long-Term Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Corporate owned life insurance policies fair value	$ 2,180	$ 1,080
Prepaid commissions	3,543	1,058
Accounts receivable	1,227	0
Prepaid expenses, deposits and other	246	385
Total other long-term assets	$ 7,196	$ 2,523
Long-term accounts receivable, stated contract period	5 years

Deferred Revenue - Summary of D

Deferred Revenue - Summary of Deferred Revenue (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Deferred Revenue Arrangement [Line Items]
Current portion of deferred revenue	$ 20,851	$ 14,020
Long-term portion of deferred revenue	30,190	21,668
Total deferred revenue	51,041	35,688
Warranty
Deferred Revenue Arrangement [Line Items]
Current portion of deferred revenue	9,610	7,270
Long-term portion of deferred revenue	16,326	14,703
Total deferred revenue	25,936	21,973
Hardware Equipment
Deferred Revenue Arrangement [Line Items]
Current portion of deferred revenue	1,738	856
Long-term portion of deferred revenue	9,841	3,396
Total deferred revenue	11,579	4,252
AXON services
Deferred Revenue Arrangement [Line Items]
Current portion of deferred revenue	9,303	5,717
Long-term portion of deferred revenue	4,023	3,569
Total deferred revenue	13,326	9,286
Other
Deferred Revenue Arrangement [Line Items]
Current portion of deferred revenue	200	177
Long-term portion of deferred revenue	0	0
Total deferred revenue	200	177
TASER Weapons | Warranty
Deferred Revenue Arrangement [Line Items]
Current portion of deferred revenue	7,278	6,591
Long-term portion of deferred revenue	13,982	13,809
Total deferred revenue	21,260	20,400
TASER Weapons | Hardware Equipment
Deferred Revenue Arrangement [Line Items]
Current portion of deferred revenue	952	365
Long-term portion of deferred revenue	2,459	753
Total deferred revenue	3,411	1,118
Axon
Deferred Revenue Arrangement [Line Items]
Current portion of deferred revenue	12,421	6,887
Long-term portion of deferred revenue	13,749	7,106
Total deferred revenue	26,170	13,993
Axon | Warranty
Deferred Revenue Arrangement [Line Items]
Current portion of deferred revenue	2,332	679
Long-term portion of deferred revenue	2,344	894
Total deferred revenue	4,676	1,573
Axon | Hardware Equipment
Deferred Revenue Arrangement [Line Items]
Current portion of deferred revenue	786	491
Long-term portion of deferred revenue	7,382	2,643
Total deferred revenue	8,168	3,134
TASER Weapons and other
Deferred Revenue Arrangement [Line Items]
Current portion of deferred revenue	8,430	7,133
Long-term portion of deferred revenue	16,441	14,562
Total deferred revenue	$ 24,871	$ 21,695

Accrued Liabilities (Detail)

Accrued Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Payables and Accruals [Abstract]
Accrued salaries and benefits	$ 3,637	$ 3,699
Accrued judgments and settlements	65	108
Accrued professional fees	718	257
Accrued warranty expense	314	675	$ 955	$ 484
Accrued income and other taxes	1,215	539
Other accrued expenses	2,694	3,967
Accrued liabilities	$ 8,643	$ 9,245

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) $ in Millions	3 Months Ended		12 Months Ended
	Dec. 31, 2015USD ($)LawsuitCase	Sep. 30, 2011Case	Dec. 31, 2015USD ($)Lawsuit	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)
Loss Contingencies [Line Items]
Rent expense under operating lease			$ 1	$ 0.9	$ 0.8
Open purchase order	$ 23		$ 23
Number of lawsuits against Company | Lawsuit	9		9
Number of active product liability cases | Case	9	55
Cases that were dismissed or judgment entered | Case	7
Severance costs				$ 0.5
Letters of credit outstanding amount	$ 3		$ 3
Surety Bond
Loss Contingencies [Line Items]
Bonds outstanding	2.4		2.4
Outstanding surety bonds expected to be released during period	0.2		0.2
Expiring May 2017
Loss Contingencies [Line Items]
Letters of credit outstanding amount	2.7		2.7
Expiring January 2017
Loss Contingencies [Line Items]
Letters of credit outstanding amount	0.3		0.3
Expiring in July 2018 | Surety Bond
Loss Contingencies [Line Items]
Bonds outstanding	2.2		$ 2.2
Minimum
Loss Contingencies [Line Items]
Operating leases, term (ranging from less than one year)			1 year
Amount payable on termination of contract	1		$ 1
Maximum
Loss Contingencies [Line Items]
Operating leases, term (ranging from less than one year)			15 years
Amount payable on termination of contract	$ 2		$ 2

Commitments and Contingencies58

Commitments and Contingencies - Lease Obligations (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2015USD ($)
Commitments and Contingencies Disclosure [Abstract]
2,016	$ 771
2,017	776
2,018	702
2,019	474
2,020	484
Thereafter	1,112
Total minimum lease payments	4,319
2,016	30
2,017	0
2,018	0
2,019	0
2,020	0
Thereafter	0
Total minimum lease payments	30
Less: Amount representing interest	(1)
Capital lease obligation	$ 29

Commitments and Contingencies59

Commitments and Contingencies - Information Regarding the Company's Insurance Coverage (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2015USD ($)
2,004
Product Liability Contingency [Line Items]
Insurance Coverage	$ 2
Deductible Amount	0.1
Remaining Insurance Coverage	2
2,005
Product Liability Contingency [Line Items]
Insurance Coverage	10
Deductible Amount	0.3
Remaining Insurance Coverage	7
2,006
Product Liability Contingency [Line Items]
Insurance Coverage	10
Deductible Amount	0.3
Remaining Insurance Coverage	3.7
2,007
Product Liability Contingency [Line Items]
Insurance Coverage	10
Deductible Amount	0.3
Remaining Insurance Coverage	8
2,008
Product Liability Contingency [Line Items]
Insurance Coverage	10
Deductible Amount	0.5
Remaining Insurance Coverage	0
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

Income Taxes - Components of De

Income Taxes - Components of Deferred Income Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Deferred income tax assets:
Net operating loss carryforward	$ 649	$ 343
Deferred revenue	6,762	4,141
Deferred compensation	1,252	423
Inventory reserve	956	508
Non-qualified and non-employee stock option expense	3,393	3,094
Capitalized research and development	3,348	4,847
Alternative minimum tax carryforward	0	1,081
Research and development tax credit carryforward	2,386	2,139
Reserves, accruals, and other	1,067	1,897
Total deferred income tax assets	19,813	18,473
Deferred income tax liabilities:
Depreciation	(2,228)	(1,674)
Amortization	(1,979)	(236)
Other	(187)	0
Total deferred income tax liabilities	(4,394)	(1,910)
Net deferred income tax assets before valuation allowance	15,419	16,563
Valuation allowance	(1,700)	(500)
Net deferred income tax assets	$ 13,719	$ 16,063

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Contingency [Line Items]
Tax expense resulting from share-based compensation tax benefits	$ 6,900	$ 8,000	$ 6,800
Deferred tax assets, state NOLs	300
Deferred tax assets, federal NOLs	1,300
Deferred tax assets, foreign NOLs	$ 1,000
R&D credit carry forwards carry forwards expiration period	various dates between 2018 and 2029
Research and development tax credit studies	$ 12,000
Liability for unrecognized tax benefits	3,200
Threshold to favorably impact effective tax rate	3,400
Unrecognized tax benefits, accrued interest	55	$ 46
ARIZONA | Expiring in Two Thousand Ninteen
Income Tax Contingency [Line Items]
Minimum tax credit carryover	$ 1,200
State
Income Tax Contingency [Line Items]
NOL carry forward expiration date	various dates between 2016 and 2031
Liability for unrecognized tax benefits	$ 200
State | ARIZONA
Income Tax Contingency [Line Items]
State research and development credit carry forwards	5,800
State | CALIFORNIA
Income Tax Contingency [Line Items]
State research and development credit carry forwards	100
Federal
Income Tax Contingency [Line Items]
Federal research and development credit carry forwards	$ 43
Federal | CALIFORNIA
Income Tax Contingency [Line Items]
NOL carry forward expiration date	between 2031 and 2035

Income Taxes - Net Deferred Tax

Income Taxes - Net Deferred Tax Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Net deferred income tax assets	$ 13,719	$ 16,063

Income Taxes - Significant Comp

Income Taxes - Significant Components of the Provision (Benefit) for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current:
Federal	$ 13,594	$ 7,793	$ 7,963
State	996	800	987
Total current	14,590	8,593	8,950
Deferred:
Federal	288	2,656	764
State	984	942	(143)
Foreign	(278)	0	0
Total deferred	994	3,598	621
Tax provision recorded as an increase in liability for unrecorded tax benefits	(156)	202	219
Provision for income taxes	$ 15,428	$ 12,393	$ 9,790

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of the Company's Effective Income Tax Rate to the Federal Statutory Rate (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Federal income tax at the statutory rate	$ 12,347	$ 11,236	$ 9,812
State income taxes, net of federal benefit	1,061	1,433	1,283
Difference between statutory and foreign tax rates	2,442	0	0
Permanent differences	(205)	98	(96)
Research and development	(1,050)	(452)	(386)
Return to provision adjustment	(67)	28	(361)
Change in liability for unrecognized tax benefits	(156)	202	219
Incentive stock option benefit	(144)	(616)	(538)
Change in valuation allowance	1,200	500	0
Other	0	(36)	(143)
Provision for income taxes	$ 15,428	$ 12,393	$ 9,790
Effective tax rate	43.60%	38.40%	34.90%

Income Taxes - Roll Forward of

Income Taxes - Roll Forward of Liability for Unrecognized Tax Benefits Exclusive of Accrued Interest (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance, beginning of period	$ 3,325	$ 3,110	$ 2,903
(Decrease) increase in previous year tax positions	(389)	0	57
Increase in current year tax positions	270	121	144
Decrease due to lapse of statute of limitations	(14)	0	0
Increase related to adjustment of previous estimates of activity	204	94	6
Balance, end of period	$ 3,396	$ 3,325	$ 3,110

Line of Credit - Additional Inf

Line of Credit - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2015USD ($)
Debt Instrument [Line Items]
Total availability under line of credit agreement	$ 10,000,000
Letters of credit outstanding amount	3,000,000
Available borrowing under letter of credit	$ 7,000,000
Varying interest on line of credit agreement	LIBOR plus 1.5% or Prime less 0.75%
Maximum ratio of total liabilities to tangible net worth	1
Minimum required fixed coverage charge ratio	1.25
Period used for calculating ratios	12 months
Company's tangible net worth ratio	0.52
Fixed coverage charge ratio	2.41
LIBOR
Debt Instrument [Line Items]
Line of credit interest rate	1.50%
Prime Rate
Debt Instrument [Line Items]
Line of credit interest rate	0.75%

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Detail)	1 Months Ended	3 Months Ended	12 Months Ended			48 Months Ended
	May. 31, 2014USD ($)$ / sharesshares	Jun. 30, 2013USD ($)$ / sharesshares	Dec. 31, 2015USD ($)Number_of_stock_repurchase$ / sharesshares	Dec. 31, 2014USD ($)$ / sharesshares	Dec. 31, 2013USD ($)$ / sharesshares	Dec. 31, 2011shares	May. 23, 2013shares	Feb. 28, 2013USD ($)	Dec. 31, 2012$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of repurchase programs authorized | Number_of_stock_repurchase			2
Common stock, par value (in dollars per share) | $ / shares			$ 0.00001	$ 0.00001
Common stock, shares authorized			200,000,000	200,000,000
Preferred stock, shares authorized			25,000,000	25,000,000
Outstanding common stock repurchase program authorized amount | $	$ 30,000,000							$ 25,000,000
Shares repurchased	2,000,000	3,000,000
Additional stock repurchase program authorized amount | $	$ 30,000,000	$ 25,000,000	$ 7,556,000	$ 22,442,000	$ 25,000,000
Remaining authorized repurchase amount | $			0
Tax payments, for net share settlement of share based award | $			1,370,000	1,347,000	309,000
Excess tax benefit from stock-based compensation | $			6,936,000	7,985,000	$ 6,797,000
Share based compensation arrangement by share based payment award future tax benefit | $			$ 3,400,000	$ 3,100,000
2013 Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for future grants							1,600,000
Shares available for future grants			1,300,000
Service Based Restricted Stock Unit
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Contractual maturity of plan			10 years
Service Based Restricted Stock Unit | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			3 years
Service Based Restricted Stock Unit | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			5 years
Performance Based Restricted Stock Unit
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Contractual maturity of plan			10 years
Approximate units of performance restricted stock granted (in shares)			49,000	140,000	270,000
Performance criteria met for approximate units (in shares)			0
Approximate units outstanding (in shares)			100,000
Incremental stock option expense | $			$ 1,500,000	$ 1,000,000	$ 1,400,000
Performance Based Restricted Stock Unit | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			1 year
Percentage of targeted shares earned that can vest			0.00%
Performance Based Restricted Stock Unit | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			5 years
Percentage of targeted shares earned that can vest			200.00%
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock price on the last trading day of the period (in dollars per share) | $ / shares			$ 17.29
Aggregate intrinsic value, RSUs vested | $			$ 12,200,000
Shares withheld, for net share settlement of share based award			54,182
Tax payments, for net share settlement of share based award | $			$ 1,400,000
Performance criteria met for approximate units (in shares)			487,951	432,706	257,693
Approximate units outstanding (in shares)			1,139,277	1,226,088	1,279,123				582,212
Unrecognized stock-based compensation expense related to non-vested stock options | $			$ 16,800,000
Weighted average period			2 years 7 months 24 days
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total intrinsic value of options exercised | $			$ 13,600,000	$ 20,200,000	$ 15,700,000
Aggregate intrinsic value, option outstanding | $			13,100,000
Aggregate intrinsic value, options exercisable | $			$ 12,800,000
Number of options outstanding (in shares)			1,102,745	1,641,083	3,365,692				6,321,076
Weighted average exercise price (in dollars per share) | $ / shares			$ 5.37	$ 5.26	$ 6.15				$ 6.05
New option granted (in shares)			0	0	0
Options expected to vest, end of year (in shares)			25,000
Non-Vested Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options outstanding (in shares)			30,600
Weighted average exercise price (in dollars per share) | $ / shares			$ 4.75
Weighted average fair value (in dollars per share) | $ / shares			$ 2.58
Weighted average remaining contractual life			3 years
Aggregate intrinsic value of unvested options | $			$ 400,000
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incremental stock option expense | $			$ 100,000	$ 0	$ 100,000
Number of options outstanding (in shares)			200,000
New option granted (in shares)						1,000,000
Unvested performance options (in shares)			30,600
Unvested share, expected to vest (in share)			25,000
Options expected to vest, end of year (in shares)			200,000
Fair value of performance-based stock options outstanding and expected to vest | $			$ 600,000
Incentive Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incremental stock option expense | $			100,000	28,000	100,000
Non Qualified Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Tax benefit recorded | $			$ 200,000	$ 700,000	$ 600,000
Repurchase of Equity
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Average cost of repurchase (in dollars per share) | $ / shares	$ 14.85	$ 8.20

Stockholders' Equity - Summary

Stockholders' Equity - Summary of Restricted Stock Unit Activity (Detail) - Restricted Stock Units (RSUs) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
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)	1,226,088	1,279,123	582,212
Number of units, Granted (in shares)	515,633	554,328	1,054,293
Number of units, Released (in shares)	(487,951)	(432,706)	(257,693)
Number of units, Forfeited (in shares)	(114,493)	(174,657)	(99,689)
Number of units outstanding, end of year (in shares)	1,139,277	1,226,088	1,279,123
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Weighted average grant date fair value, Units outstanding, beginning of year (in dollars per share)	$ 13.23	$ 9.67	$ 5.42
Weighted average grant date fair value, Granted (in dollars per share)	26.18	16.98	10.72
Weighted average grant date fair value, Released (in dollars per share)	11.82	7.61	5.44
Weighted average grant date fair value, Forfeited (in dollars per share)	16.72	13.08	6.86
Weighted average grant date fair value, Units outstanding, end of year (in dollars per share)	$ 19.30	$ 13.23	$ 9.67
Aggregate intrinsic value at year end (in thousands)	$ 19,698

Stockholders' Equity - Summar69

Stockholders' Equity - Summary of the Company's Stock Options Activity (Detail) - Stock Options - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Number of options, Options outstanding, beginning of year (in shares)	1,641,083	3,365,692	6,321,076
Number of options, Granted (in shares)	0	0	0
Number of options, Exercised (in shares)	(525,180)	(1,644,146)	(2,671,058)
Number of options, Expired / terminated (in shares)	(13,158)	(80,463)	(284,326)
Number of options, Options outstanding, end of year (in shares)	1,102,745	1,641,083	3,365,692
Number of options, Options exercisable, end of year (in shares)	1,072,145	1,605,789	3,217,146
Number of options, Options expected to vest, end of year (in shares)	25,000
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)	$ 5.26	$ 6.15	$ 6.05
Weighted average exercise price, Granted (in dollars per share)	0	0	0
Weighted average exercise price, Exercised (in dollars per share)	4.95	6.69	5.75
Weighted average exercise price, Expired / terminated (in dollars per share)	7.27	16.59	7.83
Weighted average exercise price, Options outstanding, end of year (in dollars per share)	5.37	5.26	6.15
Weighted average exercise price, Options exercisable, end of year (in dollars per share)	5.39	$ 5.27	$ 6.22
Weighted average exercise price, Options expected to vest, end of year (in dollars per share)	$ 4.75

Stockholders' Equity - Summar70

Stockholders' Equity - Summary of Stock Options Outstanding and Exercisable (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Range One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of exercise price, Lower limit (in dollars per share)	$ 4
Range of exercise price, Upper limit (in dollars per share)	5
Range Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of exercise price, Lower limit (in dollars per share)	5.01
Range of exercise price, Upper limit (in dollars per share)	7
Range Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of exercise price, Lower limit (in dollars per share)	7.01
Range of exercise price, Upper limit (in dollars per share)	10
Range Four
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of exercise price, Lower limit (in dollars per share)	10.01
Range of exercise price, Upper limit (in dollars per share)	16.23
Range Five
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Range of exercise price, Lower limit (in dollars per share)	4
Range of exercise price, Upper limit (in dollars per share)	$ 16.23
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options outstanding (in shares)	1,102,745	1,641,083	3,365,692	6,321,076
Options outstanding, Weighted average exercise price (in dollars per share)	$ 5.37	$ 5.26	$ 6.15	$ 6.05
Number of options exercisable (in shares)	1,072,145	1,605,789	3,217,146
Options exercisable, Weighted average exercise price (in dollars per share)	$ 5.39	$ 5.27	$ 6.22
Stock Options | Range One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options outstanding (in shares)	783,598
Options outstanding, Weighted average exercise price (in dollars per share)	$ 4.64
Options outstanding, Weighted average remaining contractual life	3 years 8 months 23 days
Number of options exercisable (in shares)	752,998
Options exercisable, Weighted average exercise price (in dollars per share)	$ 4.63
Options exercisable, Weighted average remaining contractual life	3 years 9 months 4 days
Stock Options | Range Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options outstanding (in shares)	137,936
Options outstanding, Weighted average exercise price (in dollars per share)	$ 5.58
Options outstanding, Weighted average remaining contractual life	2 years 11 months 12 days
Number of options exercisable (in shares)	137,936
Options exercisable, Weighted average exercise price (in dollars per share)	$ 5.58
Options exercisable, Weighted average remaining contractual life	2 years 11 months 12 days
Stock Options | Range Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options outstanding (in shares)	113,322
Options outstanding, Weighted average exercise price (in dollars per share)	$ 7.24
Options outstanding, Weighted average remaining contractual life	2 years 2 months 12 days
Number of options exercisable (in shares)	113,322
Options exercisable, Weighted average exercise price (in dollars per share)	$ 7.24
Options exercisable, Weighted average remaining contractual life	2 years 2 months 12 days
Stock Options | Range Four
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options outstanding (in shares)	67,889
Options outstanding, Weighted average exercise price (in dollars per share)	$ 10.30
Options outstanding, Weighted average remaining contractual life	1 year 4 months 24 days
Number of options exercisable (in shares)	67,889
Options exercisable, Weighted average exercise price (in dollars per share)	$ 10.30
Options exercisable, Weighted average remaining contractual life	1 year 4 months 24 days
Stock Options | Range Five
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options outstanding (in shares)	1,102,745
Options outstanding, Weighted average exercise price (in dollars per share)	$ 5.37
Options outstanding, Weighted average remaining contractual life	3 years 3 months 29 days
Number of options exercisable (in shares)	1,072,145
Options exercisable, Weighted average exercise price (in dollars per share)	$ 5.39
Options exercisable, Weighted average remaining contractual life	3 years 4 months 2 days

Stockholders' Equity - Reported

Stockholders' Equity - Reported Share-Based Compensation (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 7,263	$ 5,579	$ 4,340
Cost of products sold and services delivered
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	402	204	175
Sales, general and administrative expenses
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	4,285	3,555	3,158
Research and development expenses
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 2,576	$ 1,820	$ 1,007

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Detail) $ in Thousands	Jul. 16, 2015USD ($)contract	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)	Dec. 31, 2013USD ($)
Director
Related Party Transaction [Line Items]
Transaction expenses incurred by parent company		$ 200	$ 200	$ 200
Outstanding payables due to related party		31	8
Affiliate
Related Party Transaction [Line Items]
Annual software licensing fee	$ 45	80
Deferred costs related to annual subscription		$ 36	$ 20
Average remaining contractual term of leases	11 years 3 months 16 days
Employee | Tactical Safety Responses Limited
Related Party Transaction [Line Items]
Number of contracts | contract	2

Employee Benefit Plans - Additi

Employee Benefit Plans - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Compensation and Retirement Disclosure [Abstract]
Company's contributions to the plan	$ 1,200	$ 900	$ 700
Deferral percentage of base salary (up to)	80.00%
Deferral percentage of other compensation (up to)	100.00%
Employee deferrals deemed vested percentage upon contribution	100.00%
Company's expected contributions to the plan	$ 40

Business Acquisitions (Details)

Business Acquisitions (Details) - USD ($) $ in Thousands	Jul. 16, 2015	May. 05, 2015	Dec. 31, 2015	Dec. 31, 2014
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Goodwill			$ 9,596	$ 2,206
MediaSolv Solutions Corporation
Business Acquisition [Line Items]
Total purchase price		$ 8,823
Cash acquired		100
Payments to acquire businesses, net		7,800
Contingent liability		1,000
Additional earn-out provisions and compensation adjustments		$ 4,000
Intangible assets, weighted average useful life		6 years 6 months
Acquisition transaction costs		$ 200
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Accounts receivable and other current assets		590
Inventory		35
Property and equipment		53
Intangible assets		4,145
Goodwill		5,849
Accounts payable and accrued liabilities		(697)
Deferred revenue		(111)
Deferred income tax liabilities, net		$ (1,041)
Tactical Safety Responses Limited
Business Acquisition [Line Items]
Total purchase price	$ 3,300
Cash acquired	$ 700
Intangible assets, weighted average useful life	7 years
Acquisition transaction costs	$ 100
Cash payments to acquire businesses	4,000
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Accounts receivable and other current assets	726
Inventory	497
Property and equipment	583
Other Assets	20
Intangible assets	881
Goodwill	1,608
Accounts payable and accrued liabilities	(207)
Notes payable	(169)
Deferred income tax liabilities, net	(605)
Total purchase price	$ 3,334

Segment Data - Additional Infor

Segment Data - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2015Segment
Segment Reporting [Abstract]
Number of reportable segments of company	2

Segment Data - Summary of Opera

Segment Data - Summary of Operational Information Relative to the Company's Reportable Segments (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Product sales	$ 56,041	$ 50,376	$ 46,713	$ 44,762	$ 46,816	$ 44,349	$ 37,175	$ 36,185	$ 185,230	$ 160,313	$ 136,123
Service revenue									12,662	4,212	1,708
Net sales									197,892	164,525	137,831
Cost of products sold									65,022	60,913	50,099
Cost of services delivered									4,223	2,064	1,889
Gross margin	36,988	$ 31,068	$ 30,723	$ 29,868	27,413	$ 28,713	$ 23,214	$ 22,208	128,647	101,548	85,843
Sales, general and administrative									69,698	54,158	46,557
Research and development									23,614	14,885	9,888
Litigation settlement (judgement)									0	0	1,450
Income from operations									35,335	32,505	27,948
Purchase of property and equipment									6,003	2,505	1,783
Purchase of intangible assets									501	183	323
Purchase of property and equipment and intangible assets in connection with business acquisitions (a)									13,119
Depreciation and amortization									3,291	4,317	5,131
Goodwill	9,596				$ 2,206				9,596	2,206
Various business acquisitions
Segment Reporting Information [Line Items]
Goodwill	7,500								7,500
TASER Weapons
Segment Reporting Information [Line Items]
Product sales									162,375	145,613	127,474
Service revenue									0
Net sales									162,375	145,613	127,474
Cost of products sold									48,821	47,680	44,025
Cost of services delivered									0
Gross margin									113,554	97,933	83,449
Sales, general and administrative									47,640	42,989	40,174
Research and development									4,470	3,872	4,311
Litigation settlement (judgement)										0	1,450
Income from operations									61,444	51,072	37,514
Purchase of property and equipment									4,159	2,233	1,324
Purchase of intangible assets									277	180	307
Purchase of property and equipment and intangible assets in connection with business acquisitions (a)									1,536
Depreciation and amortization									2,311	3,936	4,011
Goodwill	800								800
Axon
Segment Reporting Information [Line Items]
Product sales									22,855	14,700	8,649
Service revenue									12,662	4,212	1,708
Net sales									35,517	18,912	10,357
Cost of products sold									16,201	13,233	6,074
Cost of services delivered									4,223	2,064	1,889
Gross margin									15,093	3,615	2,394
Sales, general and administrative									22,058	11,169	6,383
Research and development									19,144	11,013	5,577
Income from operations									(26,109)	(18,567)	(9,566)
Purchase of property and equipment									1,844	272	459
Purchase of intangible assets									224	3	16
Purchase of property and equipment and intangible assets in connection with business acquisitions (a)									11,583
Depreciation and amortization									980	$ 381	$ 1,120
Goodwill	$ 6,700								$ 6,700

Selected Quarterly Financial 77

Selected Quarterly Financial Data (unaudited) (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 56,041	$ 50,376	$ 46,713	$ 44,762	$ 46,816	$ 44,349	$ 37,175	$ 36,185	$ 185,230	$ 160,313	$ 136,123
Gross margin	36,988	31,068	30,723	29,868	27,413	28,713	23,214	22,208	128,647	101,548	85,843
Net income	$ 5,104	$ 1,521	$ 6,103	$ 7,205	$ 5,086	$ 7,558	$ 3,883	$ 3,391	$ 19,933	$ 19,918	$ 18,244
Earnings Per Share [Abstract]
Basic (in dollars per share)	$ 0.10	$ 0.03	$ 0.11	$ 0.14	$ 0.10	$ 0.14	$ 0.07	$ 0.06	$ 0.37	$ 0.38	$ 0.35
Diluted (in dollars per share)	$ 0.09	$ 0.03	$ 0.11	$ 0.13	$ 0.09	$ 0.14	$ 0.07	$ 0.06	$ 0.36	$ 0.37	$ 0.34

Supplemental Disclosure to Ca78

Supplemental Disclosure to Cash Flows - Summary of Supplemental Non-Cash and Other Cash Flow Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Supplemental Cash Flow Elements [Abstract]
Cash paid for income taxes, net of refunds	$ 6,759	$ 386	$ 3,625
Non-cash transactions:
Stock issued for business acquisition	0	0	1,578
Property and equipment purchases in accounts payable	$ 315	$ 270	$ 279

Schedule II - Valuation and Qua

Schedule II - Valuation and Qualifying Accounts (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Allowance for Doubtful Accounts
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	$ 251	$ 200	$ 200
Charged to Costs and Expenses	86	142	24
Deductions	(15)	(91)	(24)
Balance at End of Period	322	251	200
Warranty Reserve
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	675	955	484
Charged to Costs and Expenses	(62)	396	1,001
Deductions	(299)	(676)	(530)
Balance at End of Period	$ 314	$ 675	$ 955