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Inventory (Tables)
3 Months Ended
Mar. 31, 2020
Inventory Disclosure [Abstract]  
Components of Inventories
Inventories consisted of the following at March 31, 2020 and December 31, 2019 (in thousands):

March 31,December 31,
20202019
Raw materials$5,041  $4,854  
Work in process1,786  1,561  
Finished goods1,700  1,644  
$8,527  $8,059