Note 9 - Leases (Details Textual) - USD ($)	Sep. 30, 2024	Mar. 31, 2024
Operating Lease, Liability, Current	$ 128,000	$ 93,000
Finance Lease, Liability, Current	1,000	0
Operating Lease, Liability, Noncurrent	397,000	198,000
Finance Lease, Liability, Noncurrent	6,000	0
Operating Lease, Right-of-Use Asset	509,000	282,000
Finance Lease, Right-of-Use Asset, after Accumulated Amortization	6,000	$ 0
Vigers Appraisal And Consulting Ltd [Member]
Operating Lease, Liability, Current	95,000
Operating Lease, Liability, Noncurrent	211,000
Operating Lease, Right-of-Use Asset	$ 306,000
Minimum [Member]
Lessee, Operating Lease, Term of Contract (Year)	35 years
Maximum [Member]
Lessee, Operating Lease, Term of Contract (Year)	57 years

Present value of lessee's discounted obligation for lease payments from finance lease, classified as current.

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

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- Definition

Present value of lessee's discounted obligation for lease payments from finance lease, classified as noncurrent.

+ References

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- Definition

Amount, after accumulated amortization, of right-of-use asset from finance 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

Term of lessee's 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/2009/role/commonPracticeRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-3

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- Definition

Present value of lessee's discounted obligation for lease payments from operating lease, classified as current.

+ References

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- Definition

Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent.

+ References

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- Definition

Amount of lessee's right to use underlying asset under operating lease.

+ References

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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