Notes Payable (Components Of Notes Payable) (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Notes Payable [Line Items]
Total	$ 26,471	$ 22,023
Less current maturities	(580)	(6,560)
Accumulated Amortization, Debt Issuance Costs, Noncurrent	59	130
Long-term Debt, Excluding Current Maturities	$ 25,832	15,333
CoBank [Member] | Term Loan [Member]
Notes Payable [Line Items]
Debt Instrument, Description of Variable Rate Basis	LIBOR plus 3.35%
Variable interest rate	3.35%
Debt Instrument, Interest Rate During Period	5.37%
Line of Credit Facility, Amount Outstanding	$ 0	6,000
CoBank [Member] | Term Revolver [Member]
Notes Payable [Line Items]
Debt Instrument, Description of Variable Rate Basis	LIBOR plus 3.35%
Variable interest rate	3.35%
Debt Instrument, Interest Rate During Period	5.37%
Line of Credit Facility, Amount Outstanding	$ 23,902	12,894
Note Payable - IDED [Member]
Notes Payable [Line Items]
Line of Credit Facility, Amount Outstanding	$ 2,569	$ 3,129
Minimum [Member] | Other debt [Member]
Notes Payable [Line Items]
Debt Instrument, Interest Rate During Period	3.50%
Maximum [Member] | Other debt [Member]
Notes Payable [Line Items]
Debt Instrument, Interest Rate During Period	4.15%