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Note 6 - Business Acquisitions (Details Textual) - USD ($)
Jun. 16, 2023
May 01, 2023
Nov. 21, 2022
Apr. 01, 2022
Sep. 30, 2023
May 31, 2023
Dec. 31, 2022
Goodwill         $ 181,466,376   $ 179,463,522
Minimum [Member]              
Finite-Lived Intangible Asset, Useful Life (Year)         2 years    
Minimum [Member] | Assets Acquired from Acquisition [Member]              
Property, Plant and Equipment, Useful Life (Year)         2 years    
Maximum [Member]              
Finite-Lived Intangible Asset, Useful Life (Year)         50 years    
Maximum [Member] | Assets Acquired from Acquisition [Member]              
Property, Plant and Equipment, Useful Life (Year)         15 years    
The 24th Street Asset Management, LLC [Member] | Boston Omaha Asset Management, LLC [Member]              
Business Acquisition, Percentage of Voting Interests Acquired   100.00%          
Business Combination, Consideration Transferred   $ 5,016,494          
Business Combination, Step Acquisition, Equity Interest in Acquiree, Percentage           48.00%  
Payments to Acquire Businesses, Gross   $ 2,759,072          
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares)   45,644          
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, Low   $ 7,226,672          
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High   $ 9,635,562          
Business Combination, Contingent Consideration Arrangements, Percentage of Excess   52.00%          
Business Combination, Contingent Consideration Arrangements, Earn-Out Threshold, Percentage   25.00%          
Business Combination, Step Acquisition, Equity Interest in Acquiree, Fair Value   $ 9,110,478          
Goodwill, Acquired During Period   536,626          
The 24th Street Asset Management, LLC [Member] | Boston Omaha Asset Management, LLC [Member] | Holdback Cash Consideration [Member]              
Payments to Acquire Businesses, Gross   1,254,102          
The 24th Street Asset Management, LLC [Member] | Boston Omaha Asset Management, LLC [Member] | Earn-Out Threshold [Member]              
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High   $ 9,635,562          
Broadband [Member}              
Payments to Acquire Businesses, Gross $ 2,881,000            
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment 844,500            
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill 1,046,000            
Broadband [Member} | Customer Relationships [Member]              
Goodwill $ 990,500            
Finite-Lived Intangible Asset, Useful Life (Year) 15 years            
InfoWest, Inc. (“InfoWest”) and Go Fiber LLC (“Go Fiber”) [Member]              
Business Combination, Consideration Transferred       $ 48,573,149      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment       5,983,410      
Goodwill       $ 18,071,004      
Business Combination, Consideration Transferred, Cash, Percentage       80.00%      
Business Combination, Consideration Transferred, Equity Issued, Percentage       20.00%      
InfoWest, Inc. (“InfoWest”) and Go Fiber LLC (“Go Fiber”) [Member] | Customer Relationships [Member]              
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill       $ 16,900,000      
Finite-Lived Intangible Asset, Useful Life (Year)       10 years      
InfoWest, Inc. (“InfoWest”) and Go Fiber LLC (“Go Fiber”) [Member] | Trade Names [Member]              
Finite-Lived Intangible Asset, Useful Life (Year)       20 years      
Elevation Outdoor Advertising [Member]              
Business Combination, Consideration Transferred     $ 14,239,257        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment     3,717,734        
Goodwill     8,017,554        
Elevation Outdoor Advertising [Member] | Customer Relationships [Member]              
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill     $ 2,484,000        
Finite-Lived Intangible Asset, Useful Life (Year)     15 years        
Elevation Outdoor Advertising [Member] | Permits [Member]              
Finite-Lived Intangible Asset, Useful Life (Year)     10 years