Quarterly report pursuant to Section 13 or 15(d)

Long Term Debt - Equipment Loans - Additional Information (Details)

Long Term Debt - Equipment Loans - Additional Information (Details) - Marquis	1 Months Ended		3 Months Ended
	Dec. 31, 2022 USD ($) option	Dec. 31, 2021 USD ($) payment	Dec. 31, 2023 USD ($) payment	Sep. 30, 2023 USD ($)
Banc Note Payable Bank Three \| Equipment loans
Debt Instrument [Line Items]
Debt face amount			$ 3,700,000
Debt periodic frequency \| payment			84
Debt periodic payment			$ 52,000,000
Interest rate (percent)			4.80%
Balance outstanding			$ 0	$ 154,000,000
Banc Note Payable Bank Four \| Equipment loans
Debt Instrument [Line Items]
Debt face amount			$ 1,100,000
Debt periodic frequency \| payment			81
Debt periodic payment			$ 16,000,000
Interest rate (percent)			4.90%
Balance outstanding			$ 0	47,000,000
Banc Note Payable Bank Five \| Equipment loans
Debt Instrument [Line Items]
Debt face amount			$ 4,000,000
Debt periodic frequency \| payment			84
Debt periodic payment			$ 55,000,000
Interest rate (percent)			4.70%
Balance outstanding			$ 643,000,000	799,000
Banc Note Payable Bank Six
Debt Instrument [Line Items]
Debt face amount			$ 913,000,000
Debt periodic frequency \| payment			60
Debt periodic payment			$ 14,000,000
Interest rate (percent)			4.70%
Balance outstanding			$ 277,000,000	317,000,000
Debt instrument, periodic payment terms			197,000,000
Banc Note Payable Bank Seven
Debt Instrument [Line Items]
Debt face amount			$ 5,000,000
Debt periodic frequency \| payment			84
Debt periodic payment			$ 59,000,000
Interest rate (percent)			3.20%
Balance outstanding			$ 2,800,000	2,900,000
Debt instrument, periodic payment terms			809,000,000
Banc Note Payable Bank Eight
Debt Instrument [Line Items]
Debt face amount			$ 3,400,000
Debt periodic frequency \| payment			84
Debt periodic payment			$ 46,000,000
Interest rate (percent)			4.00%
Balance outstanding			$ 1,900,000	2,000,000
Banc Note Payable Bank Nine
Debt Instrument [Line Items]
Debt face amount		$ 5,500,000
Debt periodic frequency \| payment		60
Debt periodic payment		$ 92,000,000
Interest rate (percent)		3.75%
Balance outstanding			3,600,000	3,900,000
Debt instrument, periodic payment terms		$ 642,000,000
Banc Note Payable Bank Ten
Debt Instrument [Line Items]
Debt face amount	$ 5,700,000
Debt periodic frequency \| option	84
Debt periodic payment	$ 79,000,000
Interest rate (percent)	6.50%
Debt instrument, periodic payment terms	$ 650,000,000
Banc Note Payable Bank Ten \| Equipment loans
Debt Instrument [Line Items]
Balance outstanding			$ 5,100,000	$ 5,300,000