Commitments and Contingencies	3 Months Ended
Mar. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Land Lease Purchase Agreement On December 13, 2018, we entered into a Purchase and Sale Agreement ("PSA") to purchase a leasehold interest to a parcel of land located in Maricopa County, Arizona for a period of 84 years, on which we intend to construct our new headquarters. The purchase price of the land lease was $13.1 million. It is also contemplated that we will prepay the rent under the lease in the amount of $10.9 million. The PSA includes a due diligence period, during which we may terminate and forfeit our initial deposit of $0.2 million. On March 4, 2019, we entered into an amendment to the PSA which extended the due diligence period to May 3, 2019. On May 3, 2019, we entered into a second amendment to the PSA which extended the due diligence period to June 28, 2019. The second amendment also revised certain stated approval dates and removed the requirement for an additional deposit originally due at the end of the due diligence period. Product Litigation We are currently named as a defendant in seven lawsuits in which the plaintiffs allege either wrongful death or personal injury in situations in which a TASER CEW was used by law enforcement officers in connection with arrests. While the facts vary from case to case, these product liability claims typically allege defective product design, manufacturing, and/or failure to warn. They seek compensatory and sometimes punitive damages, often in unspecified amounts. We continue to aggressively defend all product litigation. As a general rule, it is our policy not to settle suspect injury or death cases. Exceptions are sometimes made where the settlement is strategically beneficial to us. Due to the confidential nature of our litigation strategy and the confidentiality agreements that are executed in the event of a settlement, we do not identify or comment on specific settlements by case or amount. Based on current information, we do not believe that the outcome of any such legal proceeding will have a material effect on our financial position, results of operations, or cash flows. We are self-insured for the first $5.0 million of any product claim made after 2014. No judgment or settlement has ever exceeded this amount in any products case. We continue to maintain product liability insurance coverage, including an insurance policy fronting arrangement, above our self-insured retention with various limits depending on the policy period. Other Litigation We are a defendant in a litigation matter filed by Digital Ally Inc. (“Digital”) in the District of Kansas alleging patent infringement regarding our Axon Signal technology. Digital seeks a judgment of infringement, monetary damages, a permanent injunction, punitive damages and attorneys’ fees and costs. Both fact and expert discovery are complete. The parties filed motions for summary judgment on January 31, 2019 and briefing is now complete. Rulings are not expected before the fourth quarter of 2019. No trial date has been set but, if necessary, is not expected to occur before the first quarter of 2020. We are vigorously defending this litigation. The case has been substantially narrowed based on (1) the district court’s dismissal of all of Digital’s antitrust claims in January 2017, which ruling was affirmed by the Federal Circuit in May 2018 and the U.S. Supreme Court denied review; (2) the district court’s dismissal of Digital’s ‘292 patent from the litigation with prejudice in March 2018, and Digital’s execution of a covenant not to sue Axon on that patent on existing Axon products; and (3) Digital’s dismissal of certain inconsistent claims in the ‘452 patent, leaving only one independent claim for resolution by the court. We believe the ‘452 patent is both invalid and not infringed, and we do not believe it is probable that we will incur a material loss. Although we have not yet been served, we are aware that a consumer class action lawsuit previously filed and dismissed in California in 2018 has been refiled in Nevada. The case alleges the TASER Pulse, X2 and X26P CEWs have a faulty safety switch based on Douglas Richey’s Pulse allegedly discharging inside its neoprene case in a jacket pocket without injury. Any such discharge was likely due to static electricity, as disclosed in our consumer warnings. We will vigorously defend this claim and the propriety of any class certification. U.S. Federal Trade Commission Investigation In June 2018 we received a letter from the U.S. Federal Trade Commission (“FTC”) with respect to its non-public investigation into our acquisition of VIEVU, LLC in May 2018. The FTC issued a subpoena for certain information and documentation relating to the acquisition on March 21, 2019. We are cooperating with the investigation. General From time to time, we are notified that we may be a party to a lawsuit or that a claim is being made against us. It is our policy to not disclose the specifics of any claim or threatened lawsuit until the summons and complaint are actually served on us. After carefully assessing the claim, and assuming we determine that we are not at fault or we disagree with the damages or relief demanded, we vigorously defend any lawsuit filed against us. We record a liability when losses are deemed probable and reasonably estimable. When losses are deemed reasonably possible but not probable, we determine whether it is possible to provide an estimate of the amount of the loss or range of possible losses for the claim, if material for disclosure. In evaluating matters for accrual and disclosure purposes, we take into consideration factors such as our historical experience with matters of a similar nature, the specific facts and circumstances asserted, the likelihood of our prevailing, the availability of insurance, and the severity of any potential loss. We reevaluate and update accruals as matters progress over time. Based on our assessment of outstanding litigation and claims as of March 31, 2019, we have determined that it is not reasonably possible that these lawsuits will individually, or in the aggregate, materially affect our 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 our insurance or will not be in excess of amounts recognized or provided by insurance coverage and will not have a material adverse effect on our operating results, financial condition or cash flows. Off-Balance Sheet Arrangements Under certain circumstances, we use letters of credit and surety bonds to guarantee our performance under various contracts, principally in connection with the installation and integration of Axon cameras and related technologies. Certain of our letters of credit and surety bonds have stated expiration dates with others being released as the contractual performance terms are completed. At March 31, 2019, we had outstanding letters of credit of $3.1 million that are expected to expire in May 2019 and September 2021. Additionally, we had $24.6 million of outstanding surety bonds at March 31, 2019, with $0.4 million expiring in 2019, $0.7 million expiring in 2020, $2.3 million expiring in 2021, $3.2 million expiring in 2022, $7.5 million expiring in 2023 and the remaining $10.5 million expiring in 2024.

Commitments and Contingencies

Land Lease Purchase Agreement

On December 13, 2018, we entered into a Purchase and Sale Agreement ("PSA") to purchase a leasehold interest to a parcel of land located in Maricopa County, Arizona for a period of 84 years, on which we intend to construct our new headquarters. The purchase price of the land lease was $13.1 million. It is also contemplated that we will prepay the rent under the lease in the amount of $10.9 million. The PSA includes a due diligence period, during which we may terminate and forfeit our initial deposit of $0.2 million. On March 4, 2019, we entered into an amendment to the PSA which extended the due diligence period to May 3, 2019. On May 3, 2019, we entered into a second amendment to the PSA which extended the due diligence period to June 28, 2019. The second amendment also revised certain stated approval dates and removed the requirement for an additional deposit originally due at the end of the due diligence period.

Product Litigation

We are currently named as a defendant in seven lawsuits in which the plaintiffs allege either wrongful death or personal injury in situations in which a TASER CEW was used by law enforcement officers in connection with arrests. While the facts vary from case to case, these product liability claims typically allege defective product design, manufacturing, and/or failure to warn. They seek compensatory and sometimes punitive damages, often in unspecified amounts.

We continue to aggressively defend all product litigation. As a general rule, it is our policy not to settle suspect injury or death cases. Exceptions are sometimes made where the settlement is strategically beneficial to us. Due to the confidential nature of our litigation strategy and the confidentiality agreements that are executed in the event of a settlement, we do not identify or comment on specific settlements by case or amount. Based on current information, we do not believe that the outcome of any such legal proceeding will have a material effect on our financial position, results of operations, or cash flows. We are self-insured for the first $5.0 million of any product claim made after 2014. No judgment or settlement has ever exceeded this amount in any products case. We continue to maintain product liability insurance coverage, including an insurance policy fronting arrangement, above our self-insured retention with various limits depending on the policy period.

Other Litigation

We are a defendant in a litigation matter filed by Digital Ally Inc. (“Digital”) in the District of Kansas alleging patent infringement regarding our Axon Signal technology. Digital seeks a judgment of infringement, monetary damages, a permanent injunction, punitive damages and attorneys’ fees and costs. Both fact and expert discovery are complete. The parties filed motions for summary judgment on January 31, 2019 and briefing is now complete. Rulings are not expected before the fourth quarter of 2019. No trial date has been set but, if necessary, is not expected to occur before the first quarter of 2020.

We are vigorously defending this litigation. The case has been substantially narrowed based on (1) the district court’s dismissal of all of Digital’s antitrust claims in January 2017, which ruling was affirmed by the Federal Circuit in May 2018 and the U.S. Supreme Court denied review; (2) the district court’s dismissal of Digital’s ‘292 patent from the litigation with prejudice in March 2018, and Digital’s execution of a covenant not to sue Axon on that patent on existing Axon products; and (3) Digital’s dismissal of certain inconsistent claims in the ‘452 patent, leaving only one independent claim for resolution by the court. We believe the ‘452 patent is both invalid and not infringed, and we do not believe it is probable that we will incur a material loss.

Although we have not yet been served, we are aware that a consumer class action lawsuit previously filed and dismissed in California in 2018 has been refiled in Nevada. The case alleges the TASER Pulse, X2 and X26P CEWs have a faulty safety switch based on Douglas Richey’s Pulse allegedly discharging inside its neoprene case in a jacket pocket without injury. Any such discharge was likely due to static electricity, as disclosed in our consumer warnings. We will vigorously defend this claim and the propriety of any class certification.

U.S. Federal Trade Commission Investigation

In June 2018 we received a letter from the U.S. Federal Trade Commission (“FTC”) with respect to its non-public investigation into our acquisition of VIEVU, LLC in May 2018. The FTC issued a subpoena for certain information and documentation relating to the acquisition on March 21, 2019. We are cooperating with the investigation.

General

From time to time, we are notified that we may be a party to a lawsuit or that a claim is being made against us. It is our policy to not disclose the specifics of any claim or threatened lawsuit until the summons and complaint are actually served on us. After carefully assessing the claim, and assuming we determine that we are not at fault or we disagree with the damages or relief demanded, we vigorously defend any lawsuit filed against us. We record a liability when losses are deemed probable and reasonably estimable. When losses are deemed reasonably possible but not probable, we determine whether it is possible to provide an estimate of the amount of the loss or range of possible losses for the claim, if material for disclosure. In evaluating matters for accrual and disclosure purposes, we take into consideration factors such as our historical experience with matters of a similar nature, the specific facts and circumstances asserted, the likelihood of our prevailing, the availability of insurance, and the severity of any potential loss. We reevaluate and update accruals as matters progress over time.

Based on our assessment of outstanding litigation and claims as of March 31, 2019, we have determined that it is not reasonably possible that these lawsuits will individually, or in the aggregate, materially affect our 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 our insurance or will not be in excess of amounts recognized or provided by insurance coverage and will not have a material adverse effect on our operating results, financial condition or cash flows.

Off-Balance Sheet Arrangements

Under certain circumstances, we use letters of credit and surety bonds to guarantee our performance under various contracts, principally in connection with the installation and integration of Axon cameras and related technologies. Certain of our letters of credit and surety bonds have stated expiration dates with others being released as the contractual performance terms are completed. At March 31, 2019, we had outstanding letters of credit of $3.1 million that are expected to expire in May 2019 and September 2021. Additionally, we had $24.6 million of outstanding surety bonds at March 31, 2019, with $0.4 million expiring in 2019, $0.7 million expiring in 2020, $2.3 million expiring in 2021, $3.2 million expiring in 2022, $7.5 million expiring in 2023 and the remaining $10.5 million expiring in 2024.