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Note 7 - Intangible Assets - Schedule of Intangible Assets (Details) - USD ($)
Sep. 30, 2020
Dec. 31, 2019
Accumulated amortization $ (23,186,522) $ (20,173,881)
Balance 31,178,572  
Total, cost 58,605,096 52,445,462
Intangible assets, net 35,418,574 32,271,581
Easements [Member]    
Accumulated amortization 0 0
Balance 4,240,002 2,032,494
Customer Relationships [Member]    
Cost 39,321,524 37,743,900
Accumulated amortization (19,926,167) (17,890,487)
Balance 19,395,357 19,853,413
Permits, Licenses and Lease Acquisition Costs [Member]    
Cost 10,720,023 10,305,521
Accumulated amortization (2,166,042) (1,443,337)
Balance 8,553,981 8,862,184
Site Location [Member]    
Cost 849,347 849,347
Accumulated amortization (179,229) (136,839)
Balance 670,118 712,508
Noncompete Agreements [Member]    
Cost 626,000 626,000
Accumulated amortization (358,981) (269,318)
Balance 267,019 356,682
Technology-Based Intangible Assets [Member]    
Cost 1,128,000 138,000
Accumulated amortization (187,410) (138,000)
Balance 940,590 0
Trademarks and Trade Names [Member]    
Cost 1,692,200 722,200
Accumulated amortization (340,693) (267,900)
Balance 1,351,507 454,300
Nonsolicitation Agreement [Member]    
Cost 28,000 28,000
Accumulated amortization (28,000) (28,000)
Balance $ 0 $ 0