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Inventories
6 Months Ended
Jun. 30, 2019
Inventory Disclosure [Abstract]  
Inventory Disclosure [Text Block]
3.
Inventories:
 
Inventories consist of the following:
 
(In thousands)   June 30,
2019
    December 31,
2018
 
             
Raw materials and component parts   $ 75,616     $ 67,508  
Finished goods     104,448       93,470  
                 
    $ 180,064     $ 160,978