Quarterly report pursuant to Section 13 or 15(d)

Note 10 - Income Taxes (Details Textual)

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Note 10 - Income Taxes (Details Textual) - USD ($)
3 Months Ended 9 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Sep. 30, 2017
Income Tax Expense (Benefit), Total $ 766,000 $ 593,000 $ 462,000 $ 1,393,000  
Effective Income Tax Rate Reconciliation, Percent, Total 30.40% 42.50% 16.20% 35.00%  
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability     $ (384,000)    
Unrecognized Tax Benefits, Ending Balance $ 0   0    
State and Local Jurisdiction [Member]          
Operating Loss Carryforwards, Valuation Allowance, Total $ 191,000   191,000   $ 159,000
State and Local Jurisdiction [Member] | Deferred Tax Assets Related to Operating Loss Carryforwards [Member]          
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount     $ 32,000