Note 14 - Leases (Details Textual) - USD ($)	Mar. 31, 2023	Mar. 31, 2022
Statement [Line Items]
Operating Lease, Liability, Current	$ 139,000	$ 211,000
Finance Lease, Liability, Current	1,200	1,000
Operating Lease, Liability, Noncurrent	62,000	201,000
Finance Lease, Liability, Noncurrent	300	2,000
Operating Lease, Right-of-Use Asset	200,000	403,000
Finance Lease, Right-of-Use Asset, after Accumulated Amortization	$ 1,300	$ 2,000
Minimum [Member]
Statement [Line Items]
Lessee, Operating Lease, Term of Contract (Month)	15 months
Maximum [Member]
Statement [Line Items]
Lessee, Operating Lease, Term of Contract (Month)	17 months