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Other Long-Term Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Jun. 30, 2020
Other Liabilities Disclosure [Abstract]    
Other long-term liabilities-capital leases $ 0 $ 9
Derivative liabilities—noncurrent 2,224 2,859
Multiemployer Plan Holdback Liability, Long-Term 1,544 1,170
Deferred income taxes 1,486 1,494
Other long-term liabilities $ 5,254 $ 5,532