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v3.25.1

Note 5 - Trade Accounts and Financing Receivables (Details Textual) - USD ($) |  | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | --- | ---
Aug. 30, 2024 | Mar. 31, 2025 | Mar. 31, 2025 | Sep. 30, 2024 | Aug. 31, 2024
Financing Receivable, before Allowance for Credit Loss |  | $ 28,084,000 | $ 28,084,000 | $ 12,996,000 |
Financing Receivable, Allowance for Credit Loss |  | 1,106,000 | 1,106,000 | $ 900,000 |
Promissory Note for Sale of Product [Member] |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss |  |  |  |  | $ 9,400,000
Notes Receivable, Interest Rate, Stated Percentage |  |  |  |  | 9.50%
Promissory Note [Member] | Discontinued Operations, Disposed of by Sale [Member] | Subsidiary, Oil and Gas Product Manufacturing Operations in the Russian Federation [Member] |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss | $ 3,500,000 |  |  |  |
Notes Receivable, Interest Rate, Stated Percentage | 5.00% |  |  |  |
Notes Receivable, Term (Year) | 10 years |  |  |  |
Notes Receivable, Periodic Payment | $ 37,000 |  |  |  |
Financing Receivable, Allowance for Credit Loss | $ 900,000 |  |  |  |
Wireless Seismic Equipment Customer [Member] |  |  |  |  |
Sales-type Lease, Interest Income |  | $ 200,000 | $ 300,000 |  |

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