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Note 20 - Commitments and Contingencies
 12 Months Ended
Dec. 31, 2017
Notes to Financial Statements  
Commitments and Contingencies Disclosure [Text Block]
20.
Commitments and contingencies
 
(a)  Lease commitments
Minimum operating lease payments are as follows:
 
Year ended December 31    
2018   $
81,727
  
2019    
69,389
  
2020    
58,273
  
2021    
46,076
  
2022    
36,685
  
Thereafter    
64,009
  
    $
356,159
  
 
(b)  Purchase commitments
Minimum contractual purchase commitments are as follows:
 
Year ended December 31    
2018   $
5,418
  
2019    
1,273
  
    $
6,691
  
 
(c) Contingencies
In the normal course of operations, the Company is subject to routine claims and litigation incidental to its business. Litigation currently pending or threatened against the Company includes disputes with former employees and commercial liability claims related to services provided by the Company. The Company believes resolution of such proceedings, combined with amounts set aside, will
not
have a material impact on the Company’s financial condition or the results of operations.