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Restructuring and Asset Impairment Charges - Restructuring Charges (Details) - USD ($)
$ in Thousands
3 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Restructuring and Related Activities [Abstract]    
Employee separation charges $ 93 $ 1,198
Asset impairment and other non-cash charges 119 343
Restructuring and asset impairment charges $ 212 $ 1,541