Note 9 - Income Taxes (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Mar. 31, 2023
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount			$ 168,000
Deferred Tax Assets, Valuation Allowance	$ 7,900,000		7,900,000
Operating Loss Carryforwards	$ 37,800,000		37,800,000
Income Taxes Paid, Net			$ 0	$ 0
Deferred Tax Assets, Net of Valuation Allowance					$ 0
Effective Income Tax Rate Reconciliation, Percent	16.30%	0.00%	3.00%	0.00%