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U.S. Tax Reform (Details) - USD ($)
 3 Months Ended 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Sep. 30, 2018
Investments, Owned, Federal Income Tax Note [Line Items]      
Effective Income Tax Rate     24.50%
Income tax expense $ 1,433,000 $ 1,781,000  
Change in tax rate, deferred tax asset, income tax expense (benefit) $ 551,000    
Deferred Tax Asset      
Investments, Owned, Federal Income Tax Note [Line Items]      
Income tax expense   $ 548,000