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Note 5 - Acquisitions and Discontinued Operations (Details Textual) - USD ($)
$ in Thousands
2 Months Ended 3 Months Ended 7 Months Ended 9 Months Ended
Aug. 14, 2025
Aug. 01, 2025
Jul. 31, 2025
Jul. 01, 2025
Mar. 14, 2025
Sep. 26, 2024
Aug. 16, 2024
Sep. 30, 2025
Sep. 30, 2025
Sep. 30, 2025
Jun. 30, 2025
Sep. 30, 2024
Mar. 31, 2024
Sep. 30, 2025
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Goodwill               $ 69,544 $ 69,544 $ 69,544       $ 69,544 $ 69,544   $ 56,524
Goodwill, Measurement Period Adjustment                             (225)    
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax                   0   $ (216)     0 $ (620)  
VA Lafayette [Member]                                  
Disposal Group, Including Discontinued Operation, Consideration             $ 1,300                    
Disposal Group, Including Discontinued Operation, Consideration, Assumption of Mortgages             11,800                    
Proceeds from Divestiture of Businesses             $ 1,100                    
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax                   (200)     $ (400)   (600)    
Southside Plumbing [Member]                                  
Subsidiary, Ownership Percentage, Noncontrolling Owner 20.00%                                
Roundhouse Electric & Equipment Co. Inc. [Member]                                  
Business Combination, Voting Equity Interest Acquired, Percentage       100.00%                          
Business Combination, Consideration Transferred       $ 23,529                          
Goodwill       9,070                          
Business Combination, Consideration Transferred, Equity Interest       3,328                          
Business Combination, Acquiree's Revenue since Acquisition Date, Actual                   4,900              
Business Combination, Acquiree's Earnings (Loss) since Acquisition Date, Actual                   3,000              
Business Combination, Acquisition-Related Cost, Expense                   500         500    
Roundhouse Electric & Equipment Co. Inc. [Member] | Seller Phantom Equity Award [Member]                                  
Business Combination, Consideration Transferred, Equity Interest       3,300                          
Roundhouse Electric & Equipment Co. Inc. [Member] | Service Fee Receivable [Member]                                  
Business Combination, Recognized Asset Acquired, Receivable, Current       $ 4,259                          
Advanced Plumbing and Drain [Member]                                  
Business Combination, Consideration Transferred   $ 3,900 $ 3,862                            
Goodwill   600 594                            
Business Combination, Acquiree's Revenue since Acquisition Date, Actual               1,200                  
Business Combination, Acquiree's Earnings (Loss) since Acquisition Date, Actual               (100)                  
Business Combination, Acquisition-Related Cost, Expense                   200         200    
Business Combination, Contingent Consideration, Range of Outcomes, Maximum, Amount   1,500 1,500                            
Business Combination, Contingent Consideration, Liability   800           800 800 800       800 800    
Advanced Plumbing and Drain [Member] | Service Fee Receivable [Member]                                  
Business Combination, Recognized Asset Acquired, Receivable, Current   $ 500 $ 503                            
Southside Plumbing [Member]                                  
Business Combination, Voting Equity Interest Acquired, Percentage 80.00%                                
Business Combination, Consideration Transferred $ 4,650                                
Goodwill 2,587                                
Business Combination, Recognized Asset Acquired, Receivable, Current 334                                
Business Combination, Acquiree's Revenue since Acquisition Date, Actual                 500                
Business Combination, Acquiree's Earnings (Loss) since Acquisition Date, Actual                 (200)                
Business Combination, Acquisition-Related Cost, Expense                   200         200    
Business Combination, Contingent Consideration, Range of Outcomes, Maximum, Amount 1,125                                
Business Combination, Contingent Consideration, Liability 200             $ 200 $ 200 200       200 200    
Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value 925                                
Southside Plumbing [Member] | Service Fee Receivable [Member]                                  
Business Combination, Recognized Asset Acquired, Receivable, Current $ 300                                
M.L.C. Plumbing, LLC [Member]                                  
Business Combination, Voting Equity Interest Acquired, Percentage         100.00%                        
Business Combination, Consideration Transferred         $ 4,960                        
Goodwill         995                        
Business Combination, Recognized Asset Acquired, Receivable, Current         46                        
Business Combination, Acquiree's Revenue since Acquisition Date, Actual                           3,700      
Business Combination, Acquiree's Earnings (Loss) since Acquisition Date, Actual                           $ 100      
Business Combination, Acquisition-Related Cost, Expense                   100         500    
Business Combination, Consideration Transferred, Net         5,000                        
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Consideration Transferred         31                        
M.L.C. Plumbing, LLC [Member] | Maximum [Member]                                  
Business Combination, Recognized Asset Acquired, Receivable, Current         $ 100                        
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Consideration Transferred                     $ 100            
Image Solutions, LLC [Member]                                  
Business Combination, Voting Equity Interest Acquired, Percentage           100.00%                      
Business Combination, Consideration Transferred           $ 20,045                      
Goodwill           6,261                      
Business Combination, Recognized Asset Acquired, Receivable, Current           575                      
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Consideration Transferred           (309)                      
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustments Related to Previous Period                   $ 300              
Goodwill, Measurement Period Adjustment                             $ 100    
Image Solutions, LLC [Member] | Previously Reported [Member]                                  
Business Combination, Consideration Transferred           $ 20,400