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Inventories (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Mar. 31, 2020
Inventory Disclosure [Abstract]    
Packaging and raw materials $ 9,107 $ 9,803
Work in process 297 355
Finished goods 104,622 105,868
Inventories 114,026 116,026
Inventory valuation reserves related to obsolete and slow-moving inventory $ 5,500 $ 6,500