Income Taxes (Tables)

6 Months Ended

Mar. 31, 2020

Income Tax Disclosure [Abstract]

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

A reconciliation of income tax expense from applying the federal statutory rates in effect for each period to total income tax expense is presented below:

	Three Months Ended March 31,						Six Months Ended March 31,
	2020			2019			2020			2019
Income before income taxes	$	7,467,808		$	6,130,718		$	12,716,331		$	9,267,093
Corporate federal tax rate	21.00		%	21.00		%	21.00		%	21.00		%
Income tax expense computed at the federal statutory rate	$	1,568,240		$	1,287,451		$	2,670,430		$	1,946,090
State income taxes, net of federal tax benefit	338,631			290,481			588,668			441,070
Net amortization of excess deferred taxes on regulated operations	(86,208		)	(86,208		)	(124,332		)	(172,417		)
Other, net	(33,171		)	(31,096		)	(105,687		)	(51,902		)
Total income tax expense	$	1,787,492		$	1,460,628		$	3,029,079		$	2,162,841
Effective tax rate	23.9		%	23.8		%	23.8		%	23.3		%