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Note 3 - Inventories
12 Months Ended
Dec. 31, 2017
Notes to Financial Statements  
Inventory Disclosure [Text Block]
Note
3
– Inventories
 
Inventories are stated at the lower of cost or market. Replacement cost approximates current cost and the excess over LIFO cost is approximately $
59.7
million and
$58.4
million at
December 
31,
2017
and
2016,
respectively. Some inventory quantities were reduced during
2017,
resulting in liquidation of some LIFO quantities carried at lower costs from earlier years versus current year costs. The related effect increased net income by approximately
$0.5
million. Allowances for excess and obsolete inventory totaled
$4.9
million and
$4.5
million at
December 
31,
2017
and
2016,
respectively.
 
Inventories
, net
 
201
7
   
201
6
 
Raw materials and in-process
  $
17,528
    $
17,986
 
Finished parts
   
48,247
     
43,423
 
Finished products
   
9,192
     
7,640
 
Total net inventories
  $
74,967
    $
69,049