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Note 7 - Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2021
Notes Tables |
Schedule of Intangible Assets and Goodwill [Table Text Block] |
|  | December 31, 2021 |  |  | December 31, 2020 |
|  |  |  |  |  | Accumulated |  |  |  |  |  |  |  |  |  |  | Accumulated |  |  |  |  |
|  | Cost |  |  | Amortization |  |  | Balance |  |  | Cost |  |  | Amortization |  |  | Balance |
Customer relationships |  | $ | 49,535,976 |  |  | $ | (23,611,856 | ) |  | $ | 25,924,120 |  |  | $ | 46,740,483 |  |  | $ | (20,558,751 | ) |  | $ | 26,181,732 |
Permits, licenses, and lease acquisition costs |  |  | 11,560,896 |  |  |  | (3,413,876 | ) |  |  | 8,147,020 |  |  |  | 11,053,673 |  |  |  | (2,412,313 | ) |  |  | 8,641,360 |
Site location |  |  | 849,347 |  |  |  | (250,085 | ) |  |  | 599,262 |  |  |  | 849,347 |  |  |  | (193,462 | ) |  |  | 655,885 |
Noncompetition agreements |  |  | 626,000 |  |  |  | (488,134 | ) |  |  | 137,866 |  |  |  | 626,000 |  |  |  | (386,934 | ) |  |  | 239,066 |
Technology |  |  | 1,128,000 |  |  |  | (311,250 | ) |  |  | 816,750 |  |  |  | 1,128,000 |  |  |  | (212,250 | ) |  |  | 915,750 |
Trade names and trademarks |  |  | 3,852,200 |  |  |  | (590,575 | ) |  |  | 3,261,625 |  |  |  | 3,602,202 |  |  |  | (369,175 | ) |  |  | 3,233,027 |
Nonsolicitation agreement |  |  | 28,000 |  |  |  | (28,000 | ) |  |  | - |  |  |  | 28,000 |  |  |  | (28,000 | ) |  |  | - |
Capitalized contract costs |  |  | 1,018,600 |  |  |  | (16,717 | ) |  |  | 1,001,883 |  |  |  | - |  |  |  | - |  |  |  | - |
Easements |  |  | 5,463,526 |  |  |  | - |  |  |  | 5,463,526 |  |  |  | 4,507,089 |  |  |  | - |  |  |  | 4,507,089 |
Total |  | $ | 74,062,545 |  |  | $ | (28,710,493 | ) |  | $ | 45,352,052 |  |  | $ | 68,534,794 |  |  | $ | (24,160,885 | ) |  | $ | 44,373,909 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] |
|  | December 31, |  |  |  |  |  |  |  |  |
|  | 2022 |  |  | 2023 |  |  | 2024 |  |  | 2025 |  |  | 2026 |  |  | Thereafter |  |  | Total |
Customer relationships |  | $ | 3,245,199 |  |  | $ | 3,245,199 |  |  | $ | 3,245,199 |  |  | $ | 3,245,199 |  |  | $ | 3,245,199 |  |  | $ | 9,698,125 |  |  | $ | 25,924,120 |
Permits, licenses and lease acquisition costs |  |  | 1,063,670 |  |  |  | 1,063,670 |  |  |  | 1,063,670 |  |  |  | 1,050,662 |  |  |  | 1,024,172 |  |  |  | 2,881,176 |  |  |  | 8,147,020 |
Site location |  |  | 56,623 |  |  |  | 56,623 |  |  |  | 56,623 |  |  |  | 56,623 |  |  |  | 56,623 |  |  |  | 316,147 |  |  |  | 599,262 |
Noncompetition agreements |  |  | 90,366 |  |  |  | 46,100 |  |  |  | 1,400 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 137,866 |
Technology |  |  | 99,000 |  |  |  | 99,000 |  |  |  | 99,000 |  |  |  | 99,000 |  |  |  | 99,000 |  |  |  | 321,750 |  |  |  | 816,750 |
Trade names and trademarks |  |  | 225,567 |  |  |  | 225,567 |  |  |  | 225,567 |  |  |  | 225,567 |  |  |  | 225,567 |  |  |  | 2,133,790 |  |  |  | 3,261,625 |
Capitalized contract costs |  |  | 101,860 |  |  |  | 101,860 |  |  |  | 101,860 |  |  |  | 101,860 |  |  |  | 101,860 |  |  |  | 492,583 |  |  |  | 1,001,883 |
Total |  | $ | 4,882,285 |  |  | $ | 4,838,019 |  |  | $ | 4,793,319 |  |  | $ | 4,778,911 |  |  | $ | 4,752,421 |  |  | $ | 15,843,571 |  |  | $ | 39,888,526 |
Customer relationships |  |  | 96 |
Permits, licenses, and lease acquisition costs |  |  | 92 |
Site location |  |  | 127 |
Noncompetition agreements |  |  | 17 |
Technology |  |  | 99 |
Trade names and trademarks |  |  | 174 |
Capitalized contract costs |  |  | 118 |

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