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Note 7 - Term Loan and Line of Credit Agreements (Tables)
 9 Months Ended
Sep. 30, 2017
Notes Tables  
Schedule of Long-term Debt Instruments [Table Text Block]
   
September 30, 2017
  
   
Gross Amount
    
Debt Issuance Costs
    
Net Amount
  
Term loan agreement
   $
11,601
     $
(175
 )   $
11,426
  
Less current portion
    
(558
 )    
19
      
(539
 )
Long-term debt
   $
11,043
     $
(156
 )   $
10,887
  
   
December 31, 2016
  
   
Gross Amount
    
Debt Issuance Costs
    
Net Amount
  
Term loan agreement
   $
12,000
     $
(189
 )   $
11,811
  
Less current portion
    
(536
 )    
19
      
(517
 )
Long-term debt
   $
11,464
     $
(170
 )   $
11,294
  
Schedule of Maturities of Long-term Debt [Table Text Block]
For the Twelve Month Period Ending September 30,
  
 
 
 
2018
   $
558
  
2019
    
589
  
2020
    
621
  
2021
    
655
  
2022
    
691
  
Thereafter
    
8,487
  
Total
   $
11,601