CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	9 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities:
Net loss	$ (11,884,000)	$ (37,680,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	18,119,000	21,231,000
Impairment of fixed assets	0	1,243,000
Postretirement Medical benefits gains	0	(14,577,000)
Deferred income taxes	0	13,472,000
Net gains from sales of assets	(4,003,000)	(62,000)
Net gains on derivatives instruments	(12,798,000)	(2,875,000)
Other adjustments	4,963,000	3,124,000
Change in operating assets and liabilities:
Accounts receivable	(7,559,000)	4,210,000
Inventories	(25,610,000)	(7,744,000)
Derivative assets, net	13,223,000	3,309,000
Other assets	1,989,000	3,184,000
Accounts payable	16,921,000	6,496,000
Accrued expenses and other	(2,988,000)	3,181,000
Net cash used in operating activities	(9,627,000)	(3,488,000)
Cash flows from investing activities:
Purchases of property, plant and equipment	(8,896,000)	(12,796,000)
Proceeds from sales of property, plant and equipment	9,062,000	2,009,000
Net cash provided by (used in) investing activities	166,000	(10,787,000)
Cash flows from financing activities:
Proceeds from Credit Facilities	15,000,000	27,150,000
Repayments on Credit Facilities	(4,950,000)	(61,150,000)
Payments of finance lease obligations	(144,000)	(57,000)
Payment of financing costs	(330,000)	(3,207,000)
Net cash provided by (used in) financing activities	9,576,000	(37,264,000)
Net increase (decrease) in cash and cash equivalents and restricted cash	115,000	(51,539,000)
Cash and cash equivalents and restricted cash at beginning of period	10,438,000	60,013,000
Cash and cash equivalents and restricted cash at end of period	10,553,000	8,474,000
Supplemental disclosure of non-cash investing and financing activities:
Non cash additions to property, plant and equipment	435,000	297,000
Non-cash issuance of 401-K common stock	$ 224,000	347,000
Cumulative preferred dividends, undeclared and unpaid		$ 428,000