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Cost of revenues and general and administrative expenses (Tables) | 12 Months Ended
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Dec. 31, 2021
Cost of revenues and general and administrative expenses |
Schedule of cost of revenues and general and administrative expenses | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31,
​ |  | 2021 |  | 2020
Cost of revenue consist of: | ​ | ​ | ​ | ​ | ​ | ​
Electricity | ​ | $ | 5,698,148 | ​ | $ | 5,389,361
Depreciation | ​ |  | 5,855,073 | ​ |  | 6,202,012
Fuel oil | ​ |  | 5,742,056 | ​ |  | 4,157,393
Employee costs | ​ |  | 12,439,042 | ​ |  | 11,465,514
Maintenance | ​ |  | 2,092,776 | ​ |  | 2,859,262
Retail license royalties | ​ |  | 1,418,820 | ​ |  | 1,489,862
Insurance | ​ |  | 1,625,862 | ​ |  | 1,491,799
Materials | ​ |  | 1,952,764 | ​ |  | 5,786,698
Other | ​ |  | 6,531,770 | ​ |  | 7,017,770
​ | ​ | $ | 43,356,311 | ​ | $ | 45,859,671
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31,
​ | ​ | 2021 | ​ | 2020
General and administrative expenses consist of: | ​ |  |  | ​ |  |
Employee costs | ​ | $ | 9,562,125 | ​ | $ | 10,086,588
Insurance | ​ |  | 1,813,026 | ​ |  | 1,436,957
Professional fees | ​ |  | 1,506,423 | ​ |  | 1,488,948
Directors’ fees and expenses | ​ |  | 851,775 | ​ |  | 865,555
Depreciation | ​ |  | 140,140 | ​ |  | 133,477
Amortization of intangible assets | ​ |  | 746,667 | ​ |  | 891,667
Other | ​ |  | 3,730,203 | ​ |  | 3,531,706
​ | ​ | $ | 18,350,359 | ​ | $ | 18,434,898

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