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Other Current Liabilities (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
Jun. 30, 2020
Payables and Accruals [Abstract]    
Accrued postretirement benefits (1) $ 50 $ 744
Accrued workers’ compensation liabilities 1,016 1,466
Cumulative preferred dividends, undeclared and unpaid 2,051 1,477
Finance lease liabilities 192 0
Other (2) 3,116 3,115
Other current liabilities $ 6,425 $ 6,802