CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	9 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash flows from operating activities:
Net loss	$ (37,680,000)	$ (27,369,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	21,231,000	22,544,000
Postretirement and Pension benefits gains	(14,577,000)	(5,760,000)
Deferred income taxes	(13,472,000)	0
Impairment of goodwill and intangible assets	0	42,030,000
Impairment of fixed assets	1,243,000	0
Net losses (gains) from sales of assets	(62,000)	(23,375,000)
Net (gains) losses on derivative instruments	(2,875,000)	9,830,000
Other adjustments	3,124,000	3,698,000
Change in operating assets and liabilities:
Accounts receivable	4,210,000	3,745,000
Inventories	(7,744,000)	1,004,000
Derivative assets/liabilities, net	3,309,000	(2,472,000)
Other assets	3,184,000	1,510,000
Accounts payable	6,496,000	(13,194,000)
Accrued expenses and other	3,181,000	(4,126,000)
Net cash (used) provided by operating activities	(3,488,000)	8,065,000
Cash flows from investing activities:
Purchases of property, plant and equipment	(12,796,000)	(13,114,000)
Proceeds from sales of property, plant and equipment	2,009,000	36,733,000
Net cash (used) provided in investing activities	(10,787,000)	23,619,000
Cash flows from financing activities:
Proceeds from revolving credit facility	27,150,000	48,000,000
Repayments on revolving credit facility	(61,150,000)	(60,000,000)
Payments of finance lease obligations	(57,000)	(40,000)
Payment of financing costs	(3,207,000)	(367,000)
Proceeds from stock option exercises	0	129,000
Net cash used by financing activities	(37,264,000)	(12,278,000)
Net (decrease) increase in cash and cash equivalents	(51,539,000)	19,406,000
Cash and cash equivalents at beginning of period	60,013,000	6,983,000
Cash and cash equivalents at end of period	8,474,000	26,389,000
Supplemental disclosure of non-cash investing and financing activities:
Non-cash additions to property, plant and equipment	297,000	1,130,000
Non-cash issuance of 401-K common stock	347,000	163,000
Cumulative preferred dividends, undeclared and unpaid	$ 428,000	$ 414,000