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Note 7 - Intangible Assets (Tables) | 9 Months Ended
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Sep. 30, 2021
Notes Tables |
Schedule of Intangible Assets and Goodwill [Table Text Block] |
|  | September 30, 2021 |  |  | December 31, 2020 |
|  |  |  |  |  | Accumulated |  |  |  |  |  |  |  |  |  |  | Accumulated |  |  |  |  |
|  | Cost |  |  | Amortization |  |  | Balance |  |  | Cost |  |  | Amortization |  |  | Balance |
Customer relationships |  | $ | 48,283,484 |  |  | $ | (22,943,605 | ) |  | $ | 25,339,879 |  |  | $ | 46,740,483 |  |  | $ | (20,558,751 | ) |  | $ | 26,181,732 |
Permits, licenses, and lease acquisition costs |  |  | 10,948,673 |  |  |  | (3,159,510 | ) |  |  | 7,789,163 |  |  |  | 11,053,673 |  |  |  | (2,412,313 | ) |  |  | 8,641,360 |
Site location |  |  | 849,347 |  |  |  | (235,813 | ) |  |  | 613,534 |  |  |  | 849,347 |  |  |  | (193,462 | ) |  |  | 655,885 |
Noncompetition agreements |  |  | 626,000 |  |  |  | (463,884 | ) |  |  | 162,116 |  |  |  | 626,000 |  |  |  | (386,934 | ) |  |  | 239,066 |
Technology |  |  | 1,128,000 |  |  |  | (286,296 | ) |  |  | 841,704 |  |  |  | 1,128,000 |  |  |  | (212,250 | ) |  |  | 915,750 |
Trade names and trademarks |  |  | 3,852,200 |  |  |  | (533,739 | ) |  |  | 3,318,461 |  |  |  | 3,602,202 |  |  |  | (369,175 | ) |  |  | 3,233,027 |
Nonsolicitation agreement |  |  | 28,000 |  |  |  | (28,000 | ) |  |  | - |  |  |  | 28,000 |  |  |  | (28,000 | ) |  |  | - |
Easements |  |  | 4,611,089 |  |  |  | - |  |  |  | 4,611,089 |  |  |  | 4,507,089 |  |  |  | - |  |  |  | 4,507,089 |
Total |  | $ | 70,326,793 |  |  | $ | (27,650,847 | ) |  | $ | 42,675,946 |  |  | $ | 68,534,794 |  |  | $ | (24,160,885 | ) |  | $ | 44,373,909 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] |
|  | September 30, |  |  |  |  |  |  |  |  |
|  | 2022 |  |  | 2023 |  |  | 2024 |  |  | 2025 |  |  | 2026 |  |  | Thereafter |  |  | Total |
Customer relationships |  | $ | 3,218,366 |  |  | $ | 3,218,366 |  |  | $ | 3,218,366 |  |  | $ | 3,218,366 |  |  | $ | 3,218,366 |  |  | $ | 9,248,049 |  |  | $ | 25,339,879 |
Permits, licenses, and lease acquisition costs |  |  | 1,002,448 |  |  |  | 1,002,448 |  |  |  | 1,002,448 |  |  |  | 995,796 |  |  |  | 968,813 |  |  |  | 2,817,210 |  |  |  | 7,789,163 |
Site location |  |  | 56,623 |  |  |  | 56,623 |  |  |  | 56,623 |  |  |  | 56,623 |  |  |  | 56,623 |  |  |  | 330,419 |  |  |  | 613,534 |
Noncompetition agreements |  |  | 95,208 |  |  |  | 64,903 |  |  |  | 2,005 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 162,116 |
Technology |  |  | 99,000 |  |  |  | 99,000 |  |  |  | 99,000 |  |  |  | 99,000 |  |  |  | 99,000 |  |  |  | 346,704 |  |  |  | 841,704 |
Trade names and trademarks |  |  | 225,567 |  |  |  | 225,567 |  |  |  | 225,567 |  |  |  | 225,567 |  |  |  | 225,567 |  |  |  | 2,190,626 |  |  |  | 3,318,461 |
Total |  | $ | 4,697,212 |  |  | $ | 4,666,907 |  |  | $ | 4,604,009 |  |  | $ | 4,595,352 |  |  | $ | 4,568,369 |  |  | $ | 14,933,008 |  |  | $ | 38,064,857 |
Customer relationships |  |  | 94 |
Permits, licenses, and lease acquisition costs |  |  | 93 |
Site location |  |  | 130 |
Noncompetition agreements |  |  | 20 |
Technology |  |  | 102 |
Trade names and trademarks |  |  | 177 |

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