Quarterly report pursuant to Section 13 or 15(d)

Inventories (Details)

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Inventories (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Mar. 31, 2019
Components of inventories    
Raw materials $ 2,263 $ 3,445
Finished goods 5,359 6,356
Total inventories $ 7,622 $ 9,801