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Related Party Transactions (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Mar. 31, 2020
Mar. 31, 2019
Jun. 30, 2019
Auburn          
Related Party Transactions          
Sales to related party $ 0.9 $ 0.9 $ 2.1 $ 2.4  
Accounts receivable related party 0.8   0.8   $ 1.2
KeySource          
Related Party Transactions          
Sales to related party 0.7 $ 0.5 1.9 $ 2.0  
Accounts receivable related party $ 0.8   $ 0.8   $ 0.7