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Note 14 - Other Current Liabilities (Tables)
12 Months Ended
Dec. 31, 2017
Notes Tables  
Schedule of Accounts Payable and Accrued Liabilities [Table Text Block]
   
Year Ended December 31
,
 
   
201
7
   
201
6
 
Salaries, wages, commissions and vacation pay
  $
7,851
    $
5,600
 
Accrued rebate
s
   
1,089
     
1,932
 
Defined contribution plan accrua
l
   
104
     
897
 
Customer deposit
s
   
473
     
670
 
Other accrued expenses
   
2,892
     
1,617
 
    $
12,409
    $
10,716