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Note 4 - Inventories (Tables)
6 Months Ended
Jun. 30, 2020
Notes Tables  
Schedule of Inventory, Current [Table Text Block]

Inventories, net:

 

June 30,

2020

  

December 31,

2019

 

Raw materials and in-process

 $19,843  $16,474 

Finished parts

  50,587   47,317 

Finished products

  12,264   12,206 

Total net inventories

 $82,694  $75,997