Note 14 - Income Taxes - Reconciliation of Effective Income Tax Rate (Details)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Statutory U.S. federal income tax rate	21.00%	21.00%
State and local income taxes, net of federal income tax benefit	(3.70%)	0.60%
Other permanent differences	5.80%	0.40%
Change in valuation allowance	104.30%	22.80%
162(m)	0.00%	0.50%
Other	3.40%	0.20%
Other deferred adjustment	26.40%	(7.50%)
AMP credits	(151.20%)	(35.20%)
Effective income tax rate	6.00%	2.80%