Note 5 - Income Tax Matters (Details Textual) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	$ 35,169	$ 1,381
Effective Income Tax Rate Reconciliation, Percent	49.30%
Income Tax Expense (Benefit)	$ 87,775	$ 3,143