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Note 7 - Loan Payable (Tables)
6 Months Ended
Jun. 30, 2018
Notes Tables  
Schedule of Standby Fees Based on Total Funded Debt to EBITDA Ratio [Table Text Block]
   
If Total Funded Debt to EBITDA is:
 
                                 
Availment type or fee
 
Less than
1.00
   
Greater than
or
equal to 1.00
and
less than 2.00
   
Greater than
or
equal to 2.00
and
less than 2.25
   
Greater than
or equal to
2.25
 
Canadian dollar borrowings based on Bankers’ Acceptance or U.S. dollar borrowings based on LIBOR (Margin)
   
2.00
%
   
2.25
%
   
2.75
%
   
3.25
%
                                 
Canadian or U.S. dollar borrowings based on Prime Rate or U.S. dollar borrowings based on Base Rate (Margin)
   
0.75
%
   
1.00
%
   
1.50
%
   
2.00
%
                                 
Standby fees
   
0.40
%
   
0.45
%
   
0.55
%
   
0.65
%
Schedule of Debt [Table Text Block]
   
June
3
0
,
2018
   
December 31,
2017
 
Facility B
   
2,500
     
-
 
Facility C
   
3,554
     
5,930
 
Facility D
   
63,373
     
71,823
 
Less: unamortized debt discount and issuance costs
   
(694
)
   
(829
)
Total loan payable
   
68,733
     
76,924
 
Less: loan payable, current portion
   
17,721
     
18,290
 
Loan payable, long-term portion
   
51,012
     
58,634
 
Schedule of Maturities of Long-term Debt [Table Text Block]
Remainder of 2018
   
8,771
 
2019
   
17,900
 
2020
   
17,900
 
2021
   
17,900
 
2022
   
5,225
 
Thereafter
   
1,731
 
    $
69,427