Quarterly report pursuant to Section 13 or 15(d)

Inventories (Details)

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Inventories (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Inventory Disclosure [Abstract]    
Raw materials $ 2,184 $ 1,333
Work in process 88 88
Finished goods 72 676
Inventories $ 2,344 $ 2,097