Note 12 - Income Taxes - Income Tax Reconciliation (Details) - USD ($)	3 Months Ended		12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2018	Sep. 30, 2017
Income Before Provision for Income Taxes	$ 1,177,991	$ (305,706)	$ 5,281,730	$ 2,188,760
Statutory rate	34.00%		21.00%	34.00%
Tax at statutory rate	$ 400,517		$ 1,109,163	$ 744,178
Permanent differences	2,055		196,142	5,465
Research and development and other credits - net				(77,220)
Valuation allowance	(452,681)
State Tax	25,654		79,165	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
Return to Provision Adjustments and Other	6,219		283,550	55,755
Total Provision for Income Taxes	$ 667,729	$ 8,000	$ 1,668,020	$ 780,364