Commitments and Contingencies	3 Months Ended
Commitments and Contingencies	Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Guarantees and Product Warranties In the normal course of business to facilitate sales of its products, the Company indemnifies other parties, including customers, resellers, lessors, and parties to other transactions with the Company, with respect to certain matters. The Company has agreed to hold the other party harmless against losses arising from a breach of representations or covenants, or out of intellectual property infringement or other claims made against certain parties. These agreements may limit the time within which an indemnification claim can be made and the amount of the claim. The Company has entered into indemnification agreements with its officers and directors and certain other employees, and the Company's bylaws contain similar indemnification obligations to the Company's agents. It is not possible to determine the maximum potential amount under these indemnification agreements due to the limited history of prior indemnification claims and the unique facts and circumstances involved in each particular agreement. The Company generally offers warranties of one year for hardware for those customers without service contracts, with the option of purchasing additional warranty coverage in yearly increments. The Company accrues for warranty costs as part of its cost of sales based on associated material product costs and technical support labor costs. Accrued warranty costs as of December 31, 2022 and September 30, 2022 were not material. Commitments In October 2022, the Company entered into an unconditional purchase commitment with one of its suppliers for the delivery of systems components. Under the terms of the agreement, the Company is obligated to purchase $10 million of component inventory annually, with a total committed amount of $40 million over a four-year term. As of December 31, 2022, the Company has $1.8 million of remaining purchases under the first year of its commitment. The Company's total non-cancelable long-term purchase commitments outstanding as of December 31, 2022 was $31.8 million. The Company leases its facilities under operating leases that expire at various dates through 2033. There have been no material changes in the Company's lease obligations compared to those discussed in Note 7 to its annual consolidated financial statements. Legal Proceedings Lynwood Investment CY Limited v. F5 Networks et al. On June 8, 2020, Lynwood Investment CY Limited (“Lynwood”) filed a lawsuit in the United States District Court for the Northern District of California against the Company and certain affiliates, along with other defendants. In its complaint, Lynwood claims to be the assignee of all rights and interests of Rambler Internet Holding LLC (“Rambler”), and alleges that the intellectual property in the NGINX software originally released by the co-founder of NGINX in 2004 belongs to Rambler (and therefore Lynwood, by assignment) because the software was created and developed while the co-founder was employed by Rambler. Lynwood asserts 26 causes of action against the various defendants, including copyright infringement, violation of trademark law, tortious interference, conspiracy, and fraud. The complaint seeks damages, disgorgement of profits, fees and costs, declarations of copyright and trademark ownership, trademark cancellations, and injunctive relief. Lynwood also initiated several trademark opposition and cancellation proceedings before the Trademark Trial and Appeal Board of the United States Patent and Trademark Office, which have all since been suspended. In August and October 2020, the Company and the other defendants filed motions to dismiss all claims asserted against them in the lawsuit. While these motions were pending, the Court ordered Lynwood to select ten of its twenty-six claims to litigate through trial while the remaining sixteen claims would be stayed pending resolution of the ten selected claims. On March 25 and 30, 2021, the Court dismissed the ten selected claims and granted Lynwood leave to cure the deficiencies in its complaint though it expressed doubt about Lynwood’s ability to do so. The Court further ruled that Lynwood may not add new causes of action or add new parties without stipulation or leave of court, and that unless Lynwood corrects “all the defects” identified in the Court’s orders and the Company’s and other defendants’ motions to dismiss, the Court will dismiss the ten claims with prejudice. On April 6, 2021, the Court referred the parties to private mediation to be completed by June 1, 2021. Pursuant to the Court’s order, the parties held a private mediation on May 27, 2021. The matter did not resolve. On April 29, 2021, Lynwood filed its amended complaint, seeking the same relief against the Company and other defendants. On May 27, 2021, the Company and other defendants filed a consolidated motion to dismiss the claims Lynwood had selected to proceed to litigate through trial, reserving their right to move to dismiss the 16 stayed claims once the Court lifts the stay. The motion to dismiss was set to be heard by the Court on October 14, 2021, but on October 11, 2021, the Court vacated the hearing and gave notice that it will decide the motion on the papers without oral argument. On August 16, 2022, the Court granted the consolidated motion to dismiss the claims Lynwood had selected to proceed to litigate through trial, without leave to amend the claims, thereby dismissing those claims with prejudice. On September 2, 2022, Lynwood informed the Court it changed its name to Hemma Investments CY Limited. On September 9, 2022, the parties stipulated to the dismissal of the remaining 16 stayed claims, with prejudice, and the Court entered a final judgment. On September 14, 2022, Lynwood filed a notice of appeal to the Ninth Circuit Court of Appeals to appeal the Court’s dismissal of the claims Lynwood had selected to proceed to litigate through trial. Lynwood’s opening appeal brief was filed on December 16, 2022 after having been granted a 30-day extension by the Court. The Company was granted a 60-day extension to file its answering brief, which is now due on March 20, 2023. Lynwood’s reply will be due April 10, 2023. Following the Court’s order granting the consolidated motion to dismiss and final judgment in the Company’s favor, the Company filed a motion on September 30, 2022 for an award of attorneys’ fees and costs incurred in defending against Lynwood’s claim of direct copyright infringement and related claims that were dismissed by the Court’s order. On December 19, 2022, the Court granted the Company’s motion, finding that the Company is entitled to an award of attorneys’ fees. The Court asked for supplemental briefing and submissions to determine the exact amount of fees to which the Company is entitled. The supplemental briefing will be complete, and the motion will stand submitted, as of February 21, 2023. In addition to the above matters, the Company is subject to a variety of legal proceedings, claims, investigations, and litigation arising in the ordinary course of business, including intellectual property litigation. Management believes that the Company has meritorious defenses to the allegations made in its pending cases and intends to vigorously defend these lawsuits; however, the Company is unable to currently determine if an unfavorable outcome is probable or estimate any potential amount or range of possible loss of these or similar matters. There are many uncertainties associated with any litigation and these actions or other third-party claims against the Company may cause it to incur costly litigation and/or substantial settlement charges that could have a material adverse effect on the Company's business, financial condition, results of operations, and cash flows. The Company records an accrual for loss contingencies for legal proceedings when it believes that an unfavorable outcome is both (a) probable and (b) the amount or range of any possible loss is reasonably estimable. The Company has not recorded any accrual for loss contingencies associated with such legal proceedings or the investigations discussed above.