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Note 11 - Long-term Debt (Tables)
12 Months Ended
Dec. 31, 2017
Notes Tables  
Schedule of Debt [Table Text Block]
Term Loans   Drawn     December 31,     Movement in 2017     December 31,  
Issue Date   Maturity Date   Amount     2016     Additions     Repayments     2017  
June 21, 2007  
December 21, 2017
   
49,875,000
     
14,414,250
     
-
     
(14,414,250
)    
-
 
February 12, 2008  
February 19, 2020
   
40,250,000
     
16,875,000
     
-
     
(2,500,000
)    
14,375,000
 
July 30, 2008  
November 4, 2020
   
33,240,000
     
17,728,000
     
-
     
(1,939,000
)    
15,789,000
 
October 9, 2008  
October 9, 2020
   
29,437,000
     
7,090,000
     
-
     
(780,000
)    
6,310,000
 
September 15, 2016  
September 15, 2021
   
24,600,000
     
21,141,273
     
-
     
(4,026,908
)    
17,114,365
 
April 14, 2014  
April 14, 2020
   
20,400,000
     
14,900,000
     
-
     
(1,800,000
)    
13,100,000
 
February 1, 2011  
September 1, 2018
   
49,400,000
     
31,250,000
     
-
     
(3,300,000
)    
27,950,000
 
March 1, 2011  
June 20, 2020
   
43,250,000
     
29,375,000
     
-
     
(3,000,000
)    
26,375,000
 
September 23, 2013  
September 30, 2020
   
45,212,500
     
28,791,594
     
-
     
(5,052,587
)    
23,739,007
 
March 24, 2014  
July 31, 2022
   
50,225,000
     
42,840,000
     
-
     
(3,605,000
)    
39,235,000
 
April 16, 2014  
April 16, 2020
   
30,000,000
     
22,335,000
     
-
     
(3,330,000
)    
19,005,000
 
June 12, 2014  
October 2, 2020
   
13,000,000
     
11,240,000
     
-
     
(880,000
)    
10,360,000
 
June 20, 2014  
January 8, 2023
   
20,925,000
     
18,440,000
     
-
     
(1,420,000
)    
17,020,000
 
December 20, 2013  
June 30, 2023
   
67,200,000
     
59,475,000
     
-
     
(3,960,000
)    
55,515,000
 
December 24, 2015  
December 14, 2022
   
22,400,000
     
20,906,672
     
-
     
(1,493,328
)    
19,413,344
 
July 4, 2014  
September 3, 2021
   
22,750,000
     
20,718,750
     
-
     
(1,625,000
)    
19,093,750
 
July 29, 2014  
July 7, 2023
   
25,350,000
     
22,709,375
     
-
     
(2,112,500
)    
20,596,875
 
December 7, 2017  
December 11, 2022
   
22,275,000
     
-
     
10,500,000
     
-
     
10,500,000
 
May 18, 2016  
May 16, 2025
   
65,650,000
     
-
     
32,500,000
     
(1,015,500
)    
31,484,500
 
Total  
 
   
 
     
400,229,914
     
43,000,000
     
(56,254,073
)    
386,975,841
 
                                             
Current portion of long-term debt  
 
   
 
     
55,238,573
     
 
     
 
     
42,580,323
 
Long term debt  
 
   
 
     
344,991,341
     
 
     
 
     
344,395,518
 
Total debt  
 
   
 
     
400,229,914
     
 
     
 
     
386,975,841
 
                                             
                                             
Current portion of deferred finance charges  
 
   
 
     
644,858
     
 
     
 
     
613,716
 
Deferred finance charges non-current  
 
   
 
     
1,699,467
     
 
     
 
     
1,453,677
 
Total deferred finance charges  
 
   
 
     
2,344,325
     
 
     
 
     
2,067,393
 
                                             
Total debt  
 
   
 
     
400,229,914
     
 
     
 
     
386,975,841
 
Less: Total deferred finance charges  
 
   
 
     
2,344,325
     
 
     
 
     
2,067,393
 
Total debt, net of deferred finance charges  
 
   
 
     
397,885,589
     
 
     
 
     
384,908,448
 
Less: Current portion of long-term debt, net of current portion of deferred finance charges  
 
   
 
     
54,593,715
     
 
     
 
     
41,966,607
 
Long term debt, net of deferred finance charges  
 
   
 
     
343,291,874
     
 
     
 
     
342,941,841
 
Schedule of Maturities of Long-term Debt [Table Text Block]
December 31,
 
Amount
 
2018    
42,580,323
 
2019    
42,505,323
 
2020    
118,038,569
 
2021    
53,874,219
 
2022    
58,478,532
 
Thereafter    
71,498,875
 
         
Total    
386,975,841