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Note 6 - Business Acquisitions - Schedule of Recognized Identified Assets Acquired and Liabilities Assumed (Details) - USD ($)	Mar. 31, 2022	Dec. 31, 2021
Goodwill, Ending Balance	$ 152,090,748	$ 151,336,976
Keleher Outdoor [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment, Total	3,276,245
Goodwill, Ending Balance	8,065,314
Right of use assets	1,634,263
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets	199,329
Total Assets Acquired	14,350,408
Lease liabilities	1,634,263
Other	496,145
Total Liabilities Assumed	2,130,408
Total	12,220,000
Keleher Outdoor [Member] | Permits [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total	179,257
Link Billboards Oklahoma LLC [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment, Total	8,419,759
Goodwill, Ending Balance	12,701,472
Right of use assets	4,093,478
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets	205,272
Total Assets Acquired	27,016,158
Lease liabilities	4,093,478
Other	777,332
Total Liabilities Assumed	4,870,810
Total	22,145,348
Link Billboards Oklahoma LLC [Member] | Customer Relationships [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total	1,174,000
Link Billboards Oklahoma LLC [Member] | Permits [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total	422,177
FibAire Communications LLC [Member] | Customer Relationships [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total	$ 996,000

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