Note 7 - Right of Use Assets and Liabilities (Details Textual) - USD ($)	3 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Oct. 01, 2019	Sep. 30, 2019
Operating Lease, Liability, Total	$ 540,000
Operating Lease, Right-of-Use Asset	$ 545,000
Operating Lease, Weighted Average Discount Rate, Percent	3.50%		3.50%
Operating Lease, Expense	$ 100,000	$ 100,000
Accounting Standards Update 2016-02 [Member]
Operating Lease, Liability, Total			$ 636,000
Operating Lease, Right-of-Use Asset			$ 636,000