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Note 10 - Other Comprehensive Loss (Details Textual) | 12 Months Ended
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Mar. 31, 2021 USD ($)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax, Parent, Total | $ (14,751,900) | [1]
Open Hedges Subject To Fair Value Changes [Member] |  |
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax, Parent, Total | (7,908,760) |
Closed Hedges with Hedged Transaction Still Expected to Occur [Member] |  |
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax, Parent, Total | $ (6,843,140) |
[1] | Of the $14,751,900 before tax comprehensive loss, $7,393,600 is associated with open hedges subject to fair value changes and $7,358,300 is realized losses associated with de-designated hedges with the hedged transaction still expected to occur.

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- Definition Amount, before tax and after reclassification, of gain (loss) from derivative instrument designated and qualifying cash flow hedge included in assessment of hedge effectiveness, attributable to parent. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=124509347&loc=d3e637-108580 + Details
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