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Inventories (Tables)
9 Months Ended
Sep. 30, 2019
Inventory Disclosure [Abstract]  
Schedule of inventories

Inventories consist of the following:

 

 

 

September 30,

 

 

December 31,

 

(in thousands)

 

2019

 

 

2018

 

Raw materials

 

$

351

 

 

$

358

 

Work-in-process

 

 

350

 

 

 

500

 

Finished goods

 

 

35

 

 

 

 

Total inventories

 

$

736

 

 

$

858