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Note 6 - Leases (Details Textual) - USD ($) | 1 Months Ended |  |
--- | --- | --- | ---
Aug. 31, 2025 | Sep. 30, 2025 | Mar. 31, 2025
Operating Lease, Right-of-Use Asset |  | $ 5,108,000 | $ 2,841,000
Operating Lease, Weighted Average Remaining Lease Term (Year) |  | 12 years 4 months 24 days |
Operating Lease, Weighted Average Discount Rate, Percent |  | 7.00% |
Operating Lease, Liability |  | $ 5,216,000 |
Orlando, FL Facility [Member] |  |  |
Operating Lease, Monthly Payments | $ 25,000 |  |
Tampa, FL Facility [Member] |  |  |
Operating Lease, Monthly Payments | $ 21,000 |  |
Century Leases [Member] |  |  |
Operating Lease, Right-of-Use Asset |  | 2,400,000 |
Operating Lease, Liability |  | $ 2,400,000 |

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- Definition Amount of monthly payments related to operating lease. + References No definition available. + Details
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Namespace Prefix: | frd_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Present value of lessee's discounted obligation for lease payments from operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479041/842-20-45-1 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Amount of lessee's right to use underlying asset under operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479041/842-20-45-1 + Details
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- Definition Weighted average discount rate for operating lease calculated at point in time. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 53 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479589/842-20-55-53 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (g)(4) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-4 + Details
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- Definition Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 53 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479589/842-20-55-53 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (g)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-4 + Details
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- Details
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- Details
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Period Type: |

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- Details
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Period Type: |