Note 12 - Income Taxes - Income Tax Reconciliation (Details) - USD ($)	3 Months Ended		12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2015
Income (Loss) Before Provision for (Recovery of) Income Taxes	$ 1,177,991		$ 2,188,760	$ 1,333,248	$ (122,377)
Statutory rate	34.00%		34.00%	34.00%	34.00%
Tax at statutory rate	$ 400,517		$ 744,178	$ 453,304	$ (41,608)
Permanent differences	2,055		5,465	1,000	900
Research and development and other credits - net			(77,220)	(47,400)	(48,500)
Valuation allowance	(452,681)			(3,681,100)	82,200
State Tax	25,654		130,560
State Net Operating Loss			(174,223)
Transaction Costs			95,849
Deferred Adjustments - change in tax rates	290,965
Change in Reserve for uncertain tax positions	395,000
Other	6,219		55,755	(25,404)	7,008
Total Provision for (Recovery of) Income Taxes	$ 667,729	$ 8,000	$ 780,364	$ (3,299,600)