Note 8 - Income Taxes (Details Textual) - USD ($)	3 Months Ended			6 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent				21.00%	21.00%
Change in Control Pursuant to Issuance of Common Stock, Shares (in shares)		4,199,998		4,199,998
Deferred Tax Liabilities, Net, Total	$ 900,000			$ 900,000
Deferred Income Tax Expense (Benefit), Total	$ (477,000)		$ 9,000	$ 948,000	$ 9,000
Effective Income Tax Rate Reconciliation, Other Reconciling Items, Amount, Total					$ 1.8