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Note 5 - Trade Accounts and Financing Receivables (Details Textual) - USD ($) |  | 3 Months Ended |
--- | --- | --- | ---
Aug. 30, 2024 | Dec. 31, 2024 | Aug. 31, 2024
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% | 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 and Direct Financing Leases, Payment to be Received |  | $ 16,700,000 |
Sales-type and Direct Financing Leases, Lease Receivable, Undiscounted Excess Amount |  | 600,000 |
Sales-type Lease, Interest Income |  | $ 100,000 |

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- Definition Period of time between issuance and maturity of notes receivable, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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