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Note 17 - Employee Benefit Plans (Tables)
 12 Months Ended
Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]  
Schedule of Defined Contribution Plan [Table Text Block]
Pension Trust
  Identification  
Pension Protection
Act (“PPA”)
Certified Zone
Status1
 
FIP / RP
Status
Pending / 		 
Contributions
   
Surcharge
 
Expiration
Date of
Collective
Bargaining
Fund   Number  
2014
 
2013
  Implemented2  
2014
   
2013
   
2012
    Imposed   Agreement3
Pension Trust Fund for Operating Engineers Pension Plan
  94-6090764  
Red
 
Red
 
Yes
  $ 1,757     $ 1,654     $ 508    
No
 
6/30/2016
Laborers Pension Trust for Northern California
  94-6277608  
Yellow
 
Yellow
 
Yes
    1,447       897       431    
No
 
6/30/2019
Carpenter Funds Administrative Office
  94-6050970  
Red
 
Red
 
Yes
    1,015       759       47    
No
 
6/30/2019
Cement Mason Pension Trust Fund For Northern California
  94-6277669  
Yellow
 
Yellow
 
Yes
    322       517       265    
No
 
6/30/2016
All other funds (84)4
                    6,267       2,608       4,290        
Various
Total Contributions:               $ 10,808     $ 6,435     $ 5,541