Note 4 - Income Tax Matters (Details Textual) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Effective Income Tax Rate Reconciliation, Percent, Total			41.00%
Income Tax Expense (Benefit), Total	$ (130,031)	$ 18,275	$ (92,764)	$ 127,364
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount			$ (2,170)	$ 47,032