Note 8 - Income Taxes - Income Tax Expense From Change in Tax Rate (Details)	3 Months Ended
	Dec. 31, 2017 USD ($)
Transition tax on deemed repatriation of certain foreign earnings	$ 514,454	[1]
Foreign Withholding Taxes	290,128	[2]
Remeasuring deferred tax position at the lowered income tax rate	(463,800)
	$ 340,782

[1] classified as part of the Federal current provision

[2] classified as part of the Federal deferred benefit