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Inventories (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Mar. 31, 2019
Inventory Disclosure [Abstract]    
Packaging and raw materials $ 10,356 $ 17,082
Work in process 309 161
Finished goods 110,698 102,637
Inventories 121,363 119,880
Inventory valuation reserves related to obsolete and slow-moving inventory $ 8,000 $ 5,500