Note 12 - Leases (Details Textual) - USD ($)	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Operating Lease, Expense	$ 88,000	$ 83,000
Lessee, Operating Lease, Renewal Term (Year)	4 years
Increase (Decrease) in Operating Lease, Right-of-use Assets			$ 394,000
Lessee, Operating Lease, Discount Rate	18.00%
Operating Lease, Weighted Average Remaining Lease Term (Year)	7 years		7 years
Lessee, Operating Lease, Liability, to be Paid			$ 2,042,000