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Leases - Composition of net lease cost (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Mar. 31, 2020
Mar. 31, 2020
Leases    
Operating lease expense $ 1,885 $ 5,647
Variable lease expense 361 992
Short-term lease expense 196 613
Total lease cost $ 2,442 $ 7,252