Quarterly report pursuant to Section 13 or 15(d)

Inventories, Net (Details)

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Inventories, Net (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Summary of Inventory    
Raw materials $ 1,809 $ 2,223
Work in process 61 64
Finished goods 261 203
Inventories, gross 2,131 2,490
Less: inventory reserves (390) (711)
Inventories, net $ 1,741 $ 1,779