Note 14 - Leases (Details Textual) - USD ($)	Mar. 31, 2025	Mar. 31, 2024
Operating Lease, Liability, Current	$ 136,000	$ 93,000
Finance Lease, Liability, Current	1,200	0
Operating Lease, Liability, Noncurrent	321,000	198,000
Finance Lease, Liability, Noncurrent	5,100	0
Operating Lease, Right-of-Use Asset	443,000	282,000
Finance Lease, Right-of-Use Asset, after Accumulated Amortization	5,700	$ 0
Office Space [Member] | UNITED STATES
Operating Lease, Liability, Current	36,000
Operating Lease, Liability, Noncurrent	162,000
Operating Lease, Right-of-Use Asset	183,000
Vigers Appraisal And Consulting Ltd [Member]
Operating Lease, Liability, Current	100,000
Operating Lease, Liability, Noncurrent	160,000
Operating Lease, Right-of-Use Asset	$ 260,000
Minimum [Member]
Lessee, Operating Lease, Term of Contract (Year)	29 years
Maximum [Member]
Lessee, Operating Lease, Term of Contract (Year)	51 years