Summary of Significant Accounting Policies (Summary of Other Comprehensive Income) (Details) - USD ($)	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Before Tax Amount, Other comprehensive loss	$ (1,291,443)	$ (2,177,821)
Tax (Expense) or Benefit, Other comprehensive loss	332,416	560,572
OTHER COMPREHENSIVE LOSS, NET OF TAX	(959,027)	(1,617,249)
Interest Rate Swaps
Accumulated Other Comprehensive Income (Loss) [Line Items]
Before Tax Amount, Other comprehensive loss before reclassification	(1,594,126)	(1,117,595)
Tax (Expense) or Benefit, Other comprehensive loss before reclassification	410,328	287,669
Net of Tax Amount, Other comprehensive loss before reclassification	(1,183,798)	(829,926)
Before Tax Amount, Reclassification	264,911	(87,309)
Tax (Expense) or Benefit, Reclassification	(68,189)	22,474
Net of Tax Amount, Reclassification	196,722	(64,835)
Before Tax Amount, Other comprehensive loss	(1,329,215)	(1,204,904)
Tax (Expense) or Benefit, Other comprehensive loss	342,139	310,143
OTHER COMPREHENSIVE LOSS, NET OF TAX	(987,076)	(894,761)
Defined Benefit Plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Before Tax Amount, Other comprehensive loss before reclassification	(52,669)	(962,612)
Tax (Expense) or Benefit, Other comprehensive loss before reclassification	13,557	247,777
Net of Tax Amount, Other comprehensive loss before reclassification	(39,112)	(714,835)
Before Tax Amount, Reclassification	90,441	(10,305)
Tax (Expense) or Benefit, Reclassification	(23,280)	2,652
Net of Tax Amount, Reclassification	67,161	(7,653)
Before Tax Amount, Other comprehensive loss	37,772	(972,917)
Tax (Expense) or Benefit, Other comprehensive loss	(9,723)	250,429
OTHER COMPREHENSIVE LOSS, NET OF TAX	$ 28,049	$ (722,488)