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Note 2 - Acquisitions (Details Textual)
$ in Thousands
3 Months Ended 8 Months Ended 9 Months Ended 11 Months Ended 12 Months Ended
Dec. 12, 2022
USD ($)
Feb. 28, 2022
USD ($)
Feb. 21, 2022
USD ($)
Jan. 24, 2022
USD ($)
Jan. 19, 2022
USD ($)
Sep. 30, 2023
USD ($)
Mar. 31, 2023
USD ($)
Sep. 30, 2022
USD ($)
Mar. 31, 2022
USD ($)
Sep. 30, 2022
USD ($)
Sep. 30, 2023
USD ($)
Sep. 30, 2022
USD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2022
USD ($)
Revenue from Contract with Customer, Including Assessed Tax           $ 8,894   $ 7,420     $ 26,920 $ 21,217    
Proceeds from Divestiture of Businesses                     0 9,317    
Term Loan in Connection with Northbound Acquisition [Member]                            
Debt Instrument, Face Amount   $ 1,500                        
Debt Instrument, Interest Rate, Stated Percentage   4.00%                        
Debt Instrument, Term (Month)   36 months                        
Dubin [Member] | Royalty [Member]                            
Revenue from Contract with Customer, Including Assessed Tax           31   56     80 107    
Temporary Alternatives [Member] | Royalty [Member]                            
Revenue from Contract with Customer, Including Assessed Tax           119   72     388 252    
Northbound [Member] | Royalty [Member]                            
Revenue from Contract with Customer, Including Assessed Tax           270   $ 286     789 717    
MRINetwork [Member] | Royalty [Member]                            
Revenue from Contract with Customer, Including Assessed Tax           $ 1,600         5,800      
Dubin [Member]                            
Business Combination, Consideration Transferred, Total     $ 2,462   $ 2,500                  
Goodwill, Acquired During Period                         $ 200  
Proceeds from Divestiture of Businesses                       350    
Business Combination, Consideration Transferred, Liabilities Incurred     362                      
Dubin [Member] | Adjusted Net Working Capital Payable [Member]                            
Business Combination, Consideration Transferred, Liabilities Incurred     62                      
Dubin [Member] | Notes Payable, Other Payables [Member]                            
Business Combination, Consideration Transferred, Liabilities Incurred     $ 300                      
Dubin [Member] | Other Miscellaneous Income [Member]                            
Gain (Loss) on Disposition of Assets Acquired in Acquisition                           $ 150,000
Dubin [Member] | Other Miscellaneous Income [Member] | Previously Reported [Member]                            
Gain (Loss) on Disposition of Assets Acquired in Acquisition                 $ (478,000)          
Dubin [Member] | Other Miscellaneous Income [Member] | Revision of Prior Period, Adjustment [Member]                            
Gain (Loss) on Disposition of Assets Acquired in Acquisition                           $ (628)
Dubin [Member] | Customer Relationships [Member]                            
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles                         972  
Dubin [Member] | Customer Lists [Member]                            
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles                         $ (772)  
Temporary Alternatives [Member]                            
Business Combination, Consideration Transferred, Total       $ 7,043                    
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles                   $ (375)        
Goodwill, Acquired During Period                   375        
Proceeds from Divestiture of Businesses                       2,900    
Significant Changes, Franchises Purchased During Period       3                    
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Financial Assets                   $ (3)        
Business Combination, Consideration Transferred, Liabilities Incurred       $ 336                    
Temporary Alternatives [Member] | Other Miscellaneous Income [Member] | Previously Reported [Member]                            
Gain (Loss) on Disposition of Assets Acquired in Acquisition                 (1,500)          
Northbound [Member]                            
Business Combination, Consideration Transferred, Total   $ 11,428                        
Goodwill, Acquired During Period             $ 500              
Proceeds from Divestiture of Businesses                 6,400          
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Financial Assets                     363      
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Other Current Assets                     (34)      
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Other Liabilities                     64      
Northbound [Member] | Adjusted Net Working Capital Payable [Member]                            
Business Combination, Consideration Transferred, Liabilities Incurred   328                        
Northbound [Member] | Notes Payable, Other Payables [Member]                            
Business Combination, Consideration Transferred, Liabilities Incurred   $ 1,500                        
Northbound [Member] | Other Miscellaneous Income [Member] | Previously Reported [Member]                            
Gain (Loss) on Disposition of Assets Acquired in Acquisition                 $ (1,700)          
Northbound [Member] | Other Miscellaneous Income [Member] | Revision of Prior Period, Adjustment [Member]                            
Gain (Loss) on Disposition of Assets Acquired in Acquisition                       $ 389    
Northbound [Member] | Customer Relationships [Member]                            
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles                     (389)      
Northbound [Member] | Trade Names [Member]                            
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles                     $ (111)      
MRINetwork [Member]                            
Business Combination, Consideration Transferred, Total $ 13,283                          
MRINetwork [Member] | Contingent Consideration Liability [Member]                            
Business Combination, Consideration Transferred, Liabilities Incurred 60                          
MRINetwork [Member] | Adjusted Net Working Capital Payable [Member]                            
Business Combination, Consideration Transferred, Liabilities Incurred $ 223