Long-term Obligations (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Sep. 30, 2020
Long-term obligations (less current portion)
Finance lease obligations	$ 7,714	$ 7,809
Environmental post-closure monitoring and maintenance activities	602	602
Long-term disability	241	251
Deferred dividends	98	139
Less amounts due within one year	(308)	(292)
Long-term obligations (less current portion)	$ 8,347	$ 8,509

Total costs accrued as of the balance sheet date for environmental loss contingencies.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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