Note 12 - Income Taxes - Income Tax Reconciliation (Details) - USD ($)	12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2015
Income (Loss) Before Provision for (Recovery of) Income Taxes	$ 2,188,760	$ 1,333,248	$ (122,377)
Statutory rate	34.00%	34.00%	34.00%
Tax at statutory rate	$ 744,178	$ 453,304	$ (41,608)
Permanent differences	5,465	1,000	900
Research and development and other credits - net	(77,220)	(47,400)	(48,500)
Valuation allowance		(3,681,100)	82,200
State Tax	130,560
State Net Operating Loss	(174,223)
Transaction Costs	95,849
Other	55,755	(25,404)	7,008
Total Provision for (Recovery of) Income Taxes	$ 780,364	$ (3,299,600)