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Note 6 - Derivative Financial Instruments - Loss Recognized in Earnings for Derivative Instruments (Details) | 12 Months Ended
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Mar. 31, 2021 USD ($)
Nonoperating Income (Expense) [Member] | Hot-rolled Coil Steel Contracts [Member] |
Hot-rolled coil steel contracts | $ 515,160

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- Definition Amount of realized and unrealized loss of derivative instruments not designated or qualifying as hedging instruments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5624171-113959 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4CC -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL109998890-113959 + Details
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- Details
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- Details
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