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Schedule II - Valuations and Qualifying Accounts
 12 Months Ended
Dec. 31, 2016
Notes to Financial Statements  
Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]
Schedule II
 
NORTHWEST PIPE COMPANY
VALUATION
AND QUALIFYING ACCOUNTS
(Dollars in thousands)
 
 
 
Balance at Beginning of Period
 
 
Charged to Profit and Loss
 
 
Deduction from Reserves
 
 
Balance at End of Period
 
Year ended December 31, 2016:
                                
Allowance for doubtful accounts
   $
751
    $
295
    $
(531
 )   $
515
 
Valuation allowance for deferred tax assets
    
7,057
     
1,160
     
-
     
8,217
 
                                 
Year ended December 31, 2015:
                                
Allowance for doubtful accounts
   $
755
    $
416
    $
(420
 )   $
751
 
Valuation allowance for deferred tax assets
    
1,858
     
5,217
     
(18
 )    
7,057
 
                                 
Year ended December 31, 2014:
                                
Allowance for doubtful accounts
   $
685
    $
411
     $
(341
 )   $
755
 
Valuation allowance for deferred tax assets
    
1,894
     
26
     
(62
 )    
1,858