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Note 2 - Business Combination (Tables)
3 Months Ended
Mar. 31, 2019
Notes Tables  
Schedule of Business Acquisitions, by Acquisition [Table Text Block]
Assets
 
 
 
 
Cash and cash equivalents
  $
912
 
Trade and other receivables
   
8,887
 
Contract assets
   
12,018
 
Inventories
   
7,937
 
Prepaid expenses and other
   
3,777
 
Property and equipment
   
34,827
 
Other assets
   
320
 
Total assets acquired
   
68,678
 
         
Liabilities
 
Accounts payable
   
5,520
 
Accrued liabilities
   
1,599
 
Contract liabilities
   
123
 
Deferred income taxes
   
3,221
 
Total liabilities assumed
   
10,463
 
         
Bargain purchase gain
   
(20,080
)
         
Total purchase consideration
  $
38,135
 
Business Acquisition, Pro Forma Information [Table Text Block]
   
Three Months
Ended March 31,
2018
 
         
Net sales
  $
43,567
 
Net loss
   
(22,614
)