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Commitments and Contingencies | 12 Months Ended
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Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract] |
Commitments and Contingencies | Commitments and Contingencies Legal Proceedings Litigation From time to time, we may be party or subject to various legal proceedings and claims, either asserted or unasserted, which arise in the ordinary course of business. Some of these proceedings involve claims that are subject to substantial uncertainties and unascertainable damages. We make a provision for a liability when it is both probable that a liability has been incurred and the amount of the loss can be reasonably estimated. Unless otherwise specifically disclosed in this note, we have determined that no provision for liability nor disclosure is required related to any claim against us because: (a) there is not a reasonable possibility that a loss exceeding amounts already recognized (if any) may be incurred with respect to such claim; (b) a reasonably possible loss or range of loss cannot be estimated; or (c) such estimate is immaterial. On March 22, 2018, the Company, and certain of its current and former executive officers, were named as defendants in a putative class action lawsuit filed in the United States District Court for the Northern District of California, captioned Shah v. A10 Networks, Inc. et al., 3:18-cv-01772-VC (the “Securities Action”). On August 31, 2018, the court appointed a lead plaintiff. On October 5, 2018, the lead plaintiff filed an amended complaint. The amended complaint named the same defendants as the initial complaint, in addition to one of the Company’s former executive vice presidents. The amended complaint asserted claims under Sections 10(b) and 20(a) of the Securities Exchange Act of 1934 and Rule 10b-5 promulgated thereunder. The Company and individual defendants filed motions to dismiss the amended complaint. On February 21, 2019, the court granted the motions to dismiss with leave to amend within 21 days. The lead plaintiff did not file an amended complaint by the Court-ordered deadline. Instead, on March 21, 2019, the lead plaintiff filed a notice of appeal in the United States Court of Appeals for the Ninth Circuit. On April 5, 2019, the clerk of court suspended briefing on the appeal and ordered that, by April 26, 2019, appellants shall either move for voluntary dismissal or show cause why the appeal should not be dismissed for lack of jurisdiction. On April 25, 2019, appellants moved to voluntarily dismiss the appeal without prejudice, and that motion was granted on May 1, 2019. The district court entered final judgment dismissing lead plaintiff’s claims on May 8, 2019. The lead plaintiff subsequently filed a notice of appeal on June 6, 2019. The parties filed a stipulated motion to voluntarily dismiss the appeal on October 7, 2019, with each side to bear its own costs. The Court of Appeals granted the stipulated motion to dismiss on October 10, 2019. On May 30, 2018, certain of our current and former directors and officers were named as defendants in a putative shareholder derivative lawsuit filed in the United States District Court for the Northern District of California, captioned Moulton v. Chen et al., 3:18-cv-03223-VC (the “Derivative Action”). We were also named as a nominal defendant. The complaint in the Derivative Action alleged breaches of fiduciary duties and other related claims in connection with purported misrepresentations related to internal controls and revenues and alleged failures to ensure that financial statements were made in accordance with generally accepted accounting principles. Plaintiff sought unspecified damages allegedly sustained by the Company, restitution, and other relief. On July 11, 2018 the Derivative Action was stayed until a motion to dismiss in the Securities Action was granted with prejudice or denied in whole or in part. Following dismissal of the Securities Action, the plaintiff voluntarily dismissed his claims on June 7, 2019. Investigations The U.S. Securities and Exchange Commission (“SEC”) conducted a private investigation into possible violations of Section 17(a) of the Securities Act of 1933 and Sections 10(b), 13(a), and 13(b) of the Securities Exchange Act of 1934 (“Exchange Act”) and Rules 10b-5, 12b-20, 13a-1, 13a-11, 13a-13, 13a-14, 13a-15, and 13b2-1 thereunder. The Company cooperated with the SEC regarding this investigation. The SEC staff informed the Company on September 6, 2019 that it had concluded its investigation and did not intend to recommend an enforcement action to the SEC. Lease Commitments The Company leases various operating spaces in the United States, Asia and Europe under non-cancelable operating lease arrangements that expire on various dates through July 2027. These arrangements require us to pay certain operating expenses, such as taxes, repairs and insurance, and contain renewal and escalation clauses. The Company recognizes rent expense under these arrangements on a straight-line basis over the term of the lease. The Company has open purchase commitments with third-party contract manufacturers with facilities in Taiwan to supply nearly all of our finished goods inventories, spare parts, and accessories. These purchase orders are expected to be paid within one year of the issuance date. The following table summarizes our non-cancelable operating leases as of December 31, 2020 (in thousands):
Years Ending December 31, | Operating Leases and Other Contractual Obligation |  |  |
2021 | $ | 6,064 |  |  |  |
2022 | 4,840 |  |  |  |
2023 | 4,414 |  |  |  |
2024 | 4,518 |  |  |  |
2025 | 4,625 |  |  |  |
Thereafter | 7,148 |  |  |  |
Total | $ | 31,609 |  |  |  |
Rent expense was $6.7 million, $4.8 million and $4.5 million for the years ended December 31, 2020, 2019 and 2018, respectively. Guarantees and Indemnifications In the normal course of business, we provide indemnifications to customers against claims of intellectual property infringement made by third parties arising from the use of our products. Other guarantees or indemnification arrangements include guarantees of product and service performance, and standby letters of credit for lease facilities and corporate credit cards. We have not recorded a liability related to these indemnifications and guarantee provisions and our guarantees and indemnification arrangements have not had any significant impact on our consolidated financial statements to date.

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