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Note 7 - Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Accumulated amortization | $ (26,531,597) | $ (24,160,885)
Balance | 40,114,107 |
Total, cost | 71,152,793 | 68,534,794
Intangible assets, net | 44,621,196 | 44,373,909
Easements [Member] |  |
Accumulated amortization | 0 | 0
Balance | 4,507,089 | 4,507,089
Customer Relationships [Member] |  |
Cost | 48,883,484 | 46,740,483
Accumulated amortization | (22,180,979) | (20,558,751)
Balance | 26,702,505 | 26,181,732
Permits, Licenses and Lease Acquisition Costs [Member] |  |
Cost | 11,278,673 | 11,053,673
Accumulated amortization | (2,923,192) | (2,412,313)
Balance | 8,355,481 | 8,641,360
Site Location [Member] |  |
Cost | 849,347 | 849,347
Accumulated amortization | (221,541) | (193,462)
Balance | 627,806 | 655,885
Noncompete Agreements [Member] |  |
Cost | 626,000 | 626,000
Accumulated amortization | (439,638) | (386,934)
Balance | 186,362 | 239,066
Technology-Based Intangible Assets [Member] |  |
Cost | 1,128,000 | 1,128,000
Accumulated amortization | (261,343) | (212,250)
Balance | 866,657 | 915,750
Trademarks and Trade Names [Member] |  |
Cost | 3,852,200 | 3,602,202
Accumulated amortization | (476,904) | (369,175)
Balance | 3,375,296 | 3,233,027
Nonsolicitation Agreement [Member] |  |
Cost | 28,000 | 28,000
Accumulated amortization | (28,000) | (28,000)
Balance | $ 0 | $ 0

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