Quarterly report pursuant to Section 13 or 15(d)

Inventories (Details)

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Inventories (Details) - USD ($)
$ in Thousands
Jun. 30, 2018
Mar. 31, 2018
Components of inventories    
Raw materials $ 3,264 $ 2,969
Finished goods 6,463 6,253
Total inventories $ 9,727 $ 9,222