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Defined Benefit Pension Plan | 6 Months Ended
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Mar. 31, 2026
Retirement Benefits [Abstract] |
Defined Benefit Pension Plan | 12. Defined Benefit Pension Plan Certain employees of Liquidity Services UK Limited (GoIndustry), which the Company acquired in July 2012, are covered by the Henry Butcher Pension Fund and Life Assurance Scheme (the Scheme), a qualified defined benefit pension plan. The Company guarantees GoIndustry's performance on all present and future obligations to make payments to the Scheme for up to a maximum of £10 million British pounds. The Scheme was closed to new members on January 1, 2002. The net periodic pension cost (benefit) is recognized within Interest and other income, net in the Condensed Consolidated Statements of Operations, and was $0.1 million and $0.1 million during the six months ended March 31, 2026 and 2025, respectively.

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