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Note 2 - Summary of Significant Accounting Policies (Tables)
 3 Months Ended
Mar. 31, 2017
Notes Tables  
New Accounting Pronouncement, Early Adoption [Table Text Block]
   
Three Months Ended March 31, 2016
  
   
As
Previously
Reported
    
Effect of
Accounting
Change
    
As
Adjusted
  
                         
Cash Flows from Operating Activities:
 
 
 
 
 
 
 
 
 
 
 
 
Restricted cash and cash equivalents
   $
(6,519
 )   $
6,519
     $
–
  
Net cash provided by operating activities
    
17,731
      
6,519
      
24,250
  
                         
Cash Flows from Investing Activities:
 
 
 
 
 
 
 
 
 
 
 
 
Change in restricted cash and cash equivalents
    
3,170
      
(3,170
 )    
–
  
Net cash used in investing activities
    
(8,439
 )    
(3,170
 )    
(11,609
 )
                         
Net Increase in Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents
    
10,975
      
3,349
      
14,324
  
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash, Equivalents, Beginning of Period
    
38,208
      
11,106
      
49,314
  
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash, Equivalents, End of Period
   $
49,183
     $
14,455
     $
63,638