Debt (Details)	Dec. 31, 2023 USD ($) instrument item	Sep. 30, 2023	Dec. 31, 2022 USD ($)	Sep. 30, 2019 USD ($)
DEBT
Deposit	$ 5,000,000		$ 5,000,000
Finance lease	$ 1,759,000		$ 277,000
Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Long-term Debt and Capital Lease Obligations, Long-term Debt and Capital Lease Obligations, Current		Long-term Debt and Capital Lease Obligations, Long-term Debt and Capital Lease Obligations, Current
Dominion Loan Agreement
DEBT
Maximum borrowing capacity				$ 5,000,000
Deposit				$ 5,000,000.0
Available for withdrawal	$ 5,000,000
Dominion Loan Agreement | Minimum
DEBT
Interest rate (as a percent)		4.75%
Dominion Loan Agreement | Maximum
DEBT
Interest rate (as a percent)		7.75%
Dominion Letters of Credit
DEBT
Number of letters of credit | item	1
Amount of letter of credit	$ 265,000
Notes payable to finance companies for insurance
DEBT
Interest rate (as a percent)	8.75%		8.24%
Number of notes payable | instrument	1
Total insurance premiums	$ 910,000