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Note 9 - Acquisitions and Subsidiaries and Joint Ventures with Noncontrolling Owners' Interests (Details) (USD $)
 1 Months Ended 3 Months Ended 1 Months Ended 3 Months Ended 1 Months Ended 3 Months Ended 1 Months Ended
Jan. 31, 2012
Aug. 31, 2011
Mar. 31, 2014
Mar. 31, 2013
Jan. 23, 2014
Dec. 31, 2013
Dec. 30, 2013
Upon Death [Member]
CEO Of RHB [Member]
Dec. 30, 2013
Upon Permanent Disability [Member]
CEO Of RHB [Member]
Jan. 23, 2014
Before Amendment [Member]
Mar. 31, 2014
Noncontrolling Owners [Member]
Mar. 31, 2014
Other Operating Income Net [Member]
Mar. 31, 2014
Interest Income [Member]
Jan. 31, 2012
RHB [Member]
Mar. 31, 2013
RHB [Member]
Apr. 27, 2012
RHB [Member]
Jan. 31, 2012
SWR Inc [Member]
Aug. 31, 2011
Years 2011 To 2015 [Member]
Aug. 31, 2011
Mar. 31, 2013
Minimum [Member]
Mar. 31, 2013
Maximum [Member]
Note 9 - Acquisitions and Subsidiaries and Joint Ventures with Noncontrolling Owners' Interests (Details) [Line Items]                                        
Number Of Assumed Construction Contracts                               6        
Deferred Revenue                               $ 25,000,000        
Non-Compete Agreement Term                               2 years        
Noncontrolling Interest, Ownership Percentage by Parent                             50.00%          
Long-term Line of Credit                         5,000,000              
Noncontrolling Interests Offer To Buy Percentage                         50.00%              
Noncontrolling Interests Offer To Sell Percentage                         50.00%              
Liquidation Value Multiplier 4.5                                      
Revaluation Pre-Tax Benenfit                           3,000,000            
Obligation To Purchase Member Interest             20,000,000 18,000,000                        
Obligation To Purchase Percentage Member Interest             50.00%                          
Cash Surrender Value of Life Insurance             20,000,000                          
Increase (Decrease) In Undistributed Earnings                     200,000                  
Business Acquisition Additional Price Payments   5,000,000                                    
Business Acquisition Additional Price Payments Term   5 years                                    
Business Acquisition Earn-Out Percentage   50.00%                                    
Business Acquisition Earn-Out Calculated Floor                                 2,000,000 1,200,000    
Business Acquisition Undiscounted Earn Out Liability Decrease         600,000                              
Business Acquisition Undiscounted Earn-Out Liability     400,000     1,400,000                            
Business Acquisition Earn Out Payment     800,000                                  
Business Acquisition Total Available Earn-Out Liability         10,000,000       5,000,000                      
EBITDA Earn Out Decrease Floor         1,500,000                              
EBITDA Earn-Out Increase Floor     17,700,000   2,000,000                              
Forcasted EBITDA Percentage                                     0.00% 33.00%
Business Acquisition Cost Of Acquired Entity Discounted Present Value Of Additional Purchase Price     400,000                                  
Revaluation Benefit                       200,000                
Business Acquisition Undiscounted Earn-Out Liability Increase     8,900,000                                  
Net Income (Loss) Attributable to Noncontrolling Interest     (275,000) (161,000)           300,000                    
Payments to Noncontrolling Interests     $ 994,000