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Note 4 - Fair Value Measurements (Tables)
9 Months Ended
Sep. 30, 2019
Goodwill [Member]  
Notes Tables  
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]
   
Goodwill Impairment Analysis
 
   
Key Assumptions
 
   
2019 - Interim
   
2018 - Annual
 
                 
Income Approach - Discounted Cash Flows:
               
Revenue 5-year compound annual growth rate (CAGR)
 
 
1.5
%  
 
2.6
%
2019 EBITDA margins
 
 
3.9
%  
 
7.6
%
Cost of equity capital
 
 
15.4
%  
 
14.2
%
Cost of debt capital
 
 
4.0
%  
 
3.7
%
Weighted average cost of capital
 
 
14.0
%  
 
13.0
%
                 
Market Approach - Multiples of Guideline Companies:
               
Net operating revenue multiples used
 
 
0.3
   
 
0.4
 
Operating EBITDA multiples used
 
 
7.0 - 8.0
   
 
5.1 - 5.7
 
Invested capital control premium
 
 
25
%  
 
25
%
                 
Weighting of Valuation Methods:
               
Income Approach - Discounted Cash Flows
 
 
75
%  
 
75
%
Market Approach - Multiples of Guideline Companies
 
 
25
%  
 
25
%