Income Taxes (Narrative) (Details) - USD ($)	3 Months Ended		9 Months Ended	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Sep. 30, 2018	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Federal corporate income tax rate	35.00%		21.00%	21.00%	21.00%	24.50%	24.50%
Revaluation of net deferred tax liability		$ (7,500,000)
Effective income tax rate				20.00%	21.90%		20.20%
Valuation allowance				$ 1,808,000	$ 1,823,000
Unrecognized tax benefits			$ 0	$ 0	$ 0	$ 0	$ 0
Open tax year				2017