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Note 14 - Other Current Liabilities (Tables)
12 Months Ended
Dec. 31, 2015
Notes Tables  
Schedule of Accounts Payable and Accrued Liabilities [Table Text Block]
   
Year Ended December 31,
 
   
2015
   
2014
 
Salaries, wages, commissions and vacation pay
  $ 5,371,000     $ 5,926,000  
Accrued rebates
    1,349,000       1,273,000  
Other accrued expenses
    1,587,000       1,796,000  
    $ 8,307,000     $ 8,995,000