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Note 4 - Sale of Subsidiary | 12 Months Ended
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Sep. 30, 2025
Notes to Financial Statements |
Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] | 4. Sale of Subsidiary On August 30, 2024, the Company sold its oil and gas product manufacturing operations based in the Russian Federation. The sale was consummated pursuant to a stock purchase agreement between the Company and a group of former employees based in the Russian Federation ("the Buyer"). Consideration to the Company consisted of a $1.0 million cash payment due from the buyer within 90 days of the sale and a $3.5 million promissory note. The note is for a 10-year term and bears interest at 5% per annum. Principal and interest installments of $37,000 are due monthly. The Company recorded a loss on sale in connection with the transaction of $14.5 million, of which $13.1 million was related to the impact of cumulative foreign currency translation losses previously included in accumulated comprehensive loss. Based on a fair value analysis performed on the promissory note as of the sale date, the Company recorded a $0.9 million discount to fair value on the note receivable. The note receivable is included as components of current and non-current trade accounts and financing receivables, net, on the consolidated balance sheet as of September 30, 2024. The sale did not have a material effect on the Company's consolidated net assets and is not expected to have a material effect on the Company's future revenue, profits or losses. Also see Note 6. The Company has determined that the Buyer's legal entity is a variable interest entity ("VIE") due to the nature of the financing for the transaction. A VIE is an entity in which equity investors lack the characteristics of a controlling financial interest or do not have sufficient equity at risk for the entity to finance its activities without additional subordinated financial support. VIEs are consolidated by the primary beneficiary, which is the party who has the power to direct the activities of a VIE that most significantly impact the entity’s economic performance and who has an obligation to absorb losses of the entity or a right to receive benefits from the entity that could potentially be significant to the entity. The Company determines whether it is the primary beneficiary of a VIE upon initial involvement with a VIE and reassesses whether it is the primary beneficiary of a VIE on an ongoing basis. The determination of whether an entity is a VIE and whether it is primary beneficiary of a VIE is based upon the facts and circumstances for the VIE and requires significant judgments such as whether the entity's interest in a VIE is a variable interest, whether it controls the activities that most significantly impact the economic performance of the VIE, and whether it has the obligation to absorb losses or the right to receive benefits of the VIE that could be significant to the VIE. A VIE is consolidated if management determines it is the primary beneficiary of the VIE. While the debt represents a direct obligation to absorb significant losses of the VIE, the debt does not establish the right and power to direct activities that most significantly impact the economic performance of the entity. The Company retained no equity or voting interest, has no employees that are directors or advisors of the new ownership group, and has no direct influence on the day-to-day decisions in operations or affects on the VIE's ability to generate profits or losses. As such, the Company has determined it is not the primary beneficiary of the VIE. The Company's maximum exposure to loss at September 30, 2025 due to its involvement with the VIE is the carrying value of our note receivable from the sale of our former subsidiary, which was $3.2 million.

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