Quarterly report pursuant to Section 13 or 15(d)

Note 9 - Income Taxes (Details Textual)

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Note 9 - Income Taxes (Details Textual) - USD ($)
3 Months Ended 9 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Sep. 30, 2019
Income Tax Expense (Benefit), Total $ 763,000 $ 454,000 $ 1,076,000 $ 849,000  
Effective Income Tax Rate Reconciliation, Percent, Total 20.30% 25.90% 20.20% 24.10%  
Unrecognized Tax Benefits, Ending Balance $ 0   $ 0    
State and Local Jurisdiction [Member]          
Operating Loss Carryforwards, Valuation Allowance, Total $ 47,000   $ 47,000   $ 47,000