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Intangible assets - Costs and accumulated amortization (Details) - USD ($) | Dec. 31, 2023 | Dec. 31, 2022
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Cost |  |
Finite-Lived Intangible Assets, Gross | $ 6,008,390 | $ 4,900,000
Accumulated amortization |  |
Finite-Lived Intangible Assets, Accumulated Amortization | (2,655,205) | (2,081,112)
Intangible assets, net | 3,353,185 | 2,818,888
Trade name |  |
Cost |  |
Finite-Lived Intangible Assets, Gross | 3,096,900 | 2,700,000
Accumulated amortization |  |
Finite-Lived Intangible Assets, Accumulated Amortization | (1,106,615) | (920,000)
Non-compete agreement |  |
Cost |  |
Finite-Lived Intangible Assets, Gross | 268,590 |
Accumulated amortization |  |
Finite-Lived Intangible Assets, Accumulated Amortization | (13,430) |
Customer relationships |  |
Cost |  |
Finite-Lived Intangible Assets, Gross | 442,900 |
Accumulated amortization |  |
Finite-Lived Intangible Assets, Accumulated Amortization | (7,382) |
Facility management contracts |  |
Cost |  |
Finite-Lived Intangible Assets, Gross | 2,200,000 | 2,200,000
Accumulated amortization |  |
Finite-Lived Intangible Assets, Accumulated Amortization | $ (1,527,778) | $ (1,161,112)

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