Quarterly report pursuant to Section 13 or 15(d)

Inventories (Details)

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Inventories (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Inventory Disclosure [Abstract]    
Raw materials $ 1,834 $ 1,739
Work in process 283 270
Finished goods 132 209
Inventories $ 2,249 $ 2,218