Note 10 - Income Taxes - Reconciliation of Effective Income Tax Rate (Details)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Federal statutory rate	21.00%	21.00%
State tax, net of federal benefit	(5.00%)	0.50%
Deferred correction – State net operating losses	8.30%	(0.80%)
Prior period accrual adjustment	65.90%	0.00%
State tax credits true-up	0.00%	0.00%
Permanent differences	(0.50%)	0.00%
Change in valuation allowance	(96.70%)	(19.80%)
Other, net	1.20%	(0.90%)
Effective income tax rate	(5.80%)	0.00%