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Inventories
6 Months Ended
Jun. 30, 2018
Inventory Disclosure [Abstract]  
Inventories
3. Inventories

 

    June 30,     December 31,  
    2018     2017  
    ($000's omitted)  
Raw material and common parts   $ 7,500     $ 8,375  
Work-in-process     4,568       2,940  
Finished goods     3,011       2,914  
      15,079       14,229  
Less inventory reserve     (1,492 )     (1,438 )
Total inventories   $ 13,587     $ 12,791