Note 4 - Acquisitions - Summary of Pro Forma Adjustments (Details) - USD ($)	3 Months Ended		6 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Pro forma adjustments, net income	$ 54,851	$ (101,369)	$ 90,414	$ (101,369)
Acquisition-related Costs [Member]
Pro forma adjustments, net income	151,313		196,329
Depreciation and Amortization Costs [Member]
Pro forma adjustments, net income	(81,881)	(163,762)	(81,881)	(163,762)
Tax Effect of Adjustments [Member]
Pro forma adjustments, net income	$ (14,581)	$ 62,393	$ (24,034)	$ 62,393