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Note 1 - Organization and Significant Accounting Policies (Details Textual)
3 Months Ended 6 Months Ended 12 Months Ended
Dec. 30, 2019
$ / shares
shares
Jun. 27, 2019
USD ($)
May 24, 2019
USD ($)
May 18, 2018
USD ($)
Jan. 01, 2018
USD ($)
Jun. 13, 2017
Jan. 30, 2017
USD ($)
Jan. 01, 2017
USD ($)
Mar. 31, 2019
USD ($)
Jun. 30, 2019
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Nov. 12, 2019
shares
Oct. 01, 2019
Jun. 29, 2018
Apr. 28, 2018
$ / shares
shares
Jan. 10, 2018
Aug. 24, 2017
USD ($)
Number of Reportable Segments                     5 6            
Stockholders' Equity Attributable to Noncontrolling Interest, Ending Balance                     $ 0 $ 0            
Equity Securities without Readily Determinable Fair Value, Amount                     10,072,358 8,915,238            
Revenue from Contract with Customer, Including Assessed Tax                     3,589,899 1,332,743            
Product and Service, Other [Member]                                    
Revenue from Contract with Customer, Including Assessed Tax                 $ 212,631   212,631 160,492            
Triad Guaranty, Inc. [Member]                                    
Equity Method Investments       $ 55,000                           $ 100,000
Percentage of Annual Interest Rate on Promissory Note       10.00%                            
Percentage Rate of Issuance of Warrants       2.50%                            
Investment Warrants, Number of Securities Called By Warrants | shares                               450,000    
Investment Warrants, Purchase Price of Warrants | $ / shares                               $ 0.01    
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | shares                         450,000          
Sale of Stock, Number of Shares Issued in Transaction | shares 450,000                                  
Sale of Stock, Price Per Share | $ / shares $ 0.18                                  
Triad Guaranty, Inc. [Member] | Other Segments [Member] | Other Operating Income (Expense) [Member]                                    
Equity Method Investment, Realized Gain (Loss) on Disposal, Total                     76,500              
Willow Oak Asset Management LLC [Member]                                    
Percentage of Performance and Management Fees Earned           50.00%                        
Willow Oak Asset Management LLC [Member] | Alluvial Fund, LP [Member]                                    
Financial Instruments, Owned, Principal Investments, at Fair Value               $ 10,000,000                    
Period Before Full Withdrawal From Capital Account Permitted               5 years                    
Financial Instruments, Withdrawal from Capital Amount         $ 3,000,000                          
Percentage of Performance and Management Fees Earned           50.00%                        
Willow Oak Asset Management LLC [Member] | Focused Compounding Capital Management, LLC [Member]                                    
Investment Ownership Percentage                           10.00%        
Percentage of Gross Management and Performance Fees Earned                           10.00%        
Willow Oak Asset Management LLC [Member] | Huckleberry Real Estate Fund II, LLC [Member]                                    
Contributed Capital, Amount             $ 750,000                      
Equity Securities without Readily Determinable Fair Value, Amount                     $ 0 $ 468,750            
Mt. Melrose LLC [Member] | Residential Properties [Member]                                    
Number of Real Estate Properties                             69   44  
Restatement Adjustment [Member]                                    
Equity Effects of Deconsolidation                   $ 638,749                
Deconsolidation, Gain (Loss), Amount                   $ (638,749)                
Mt. Melrose LLC [Member]                                    
Equity Method Investment, Realized Gain (Loss) on Disposal, Total   $ (4,157,809)                                
Rooter Hero [Member]                                    
Proceeds from Sale of Productive Assets, Total     $ 0                              
Royalty Agreement, Percent of Revenue in First Year     7.50%                              
Royalty Agreement, Percent of Revenue in Year Two Through Five     5.00%                              
Woodmont [Member] | Mt. Melrose LLC [Member]                                    
Ownership Interest, Sold, Percent   65.00%                                
Proceeds from Divestiture of Interest in Consolidated Subsidiaries   $ 100,000