Note 6 - Leases (Details Textual) - USD ($)	1 Months Ended
	Jun. 30, 2026	Mar. 31, 2026
Operating Lease, Right-of-Use Asset	$ 6,173,000	$ 4,702,000
Operating Lease, Weighted Average Remaining Lease Term (Year)	10 years 1 month 6 days
Operating Lease, Weighted Average Discount Rate, Percent	7.00%
Operating Lease, Liability	$ 6,344,000
Century Leases [Member]
Operating Lease, Monthly Payments	47,000
Operating Lease, Right-of-Use Asset	1,700,000
Operating Lease, Liability	$ 1,700,000