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Note 6 - Long-Term Debt (Details Textual) - USD ($) | 1 Months Ended |  |  |
--- | --- | --- | --- | ---
Nov. 30, 2024 | Sep. 30, 2025 | Mar. 31, 2025 | Sep. 23, 2024
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] | Secured Overnight Financing Rate (SOFR) [Member] |  |  |
RUS Loan Agreement [Member] | Amplex Holdings [Member] |  |  |  |
Debt Instrument, Face Amount |  |  |  | $ 21,341,792
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 2.00%
Bank Equipment Loans [Member] |  |  |  |
Debt Instrument, Variable Rate, Maximum | 18.00% |  |  |
Outstanding Long Term Debt [Member] |  |  |  |
Long-Term Debt, Weighted Average Interest Rate, at Point in Time |  | 2.62% | 4.73% |
Short-Term Debt, Weighted Average Interest Rate, at Point in Time |  | 7.07% | 15.50% |

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