Note 7 - Earnings Per Common Share - Summary of Earnings Per Share Calculation (Details) - USD ($)	3 Months Ended		6 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Earnings (Loss) Per Share - Basic
Net Income (Loss)	$ 213,140	$ (464,444)	$ (100,566)	$ (511,633)
Weighted average shares of common stock outstanding - Basic (in shares)	2,877,493	1,638,215	2,865,165	1,638,215
Earnings (Loss) Per Share - Basic (in dollars per share)	$ 0.07	$ (0.28)	$ (0.04)	$ (0.31)
Earnings (Loss) Per Share - Diluted
Weighted average shares of common stock outstanding - Basic (in shares)	2,877,493	1,638,215	2,865,165	1,638,215
Warrants and options (in shares)	87,236
Weighted average shares of common stock - Diluted (in shares)	2,964,729	1,638,215	2,865,165	1,638,215
Net Income (Loss)	$ 213,140	$ (464,444)	$ (100,566)	$ (511,633)
Earnings (Loss) Per Share - Diluted (in dollars per share)	$ 0.07	$ (0.28)	$ (0.04)	$ (0.31)