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Accounting policies (Tables) | 9 Months Ended
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Sep. 30, 2023
Accounting policies |
Schedule of Disaggregation of revenue | The following table presents the Company’s revenue disaggregated by revenue source. ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended September 30, |  | Nine Months Ended September 30,
​ |  | 2023 |  | 2022 |  | 2023 |  | 2022
Retail revenue | ​ | $ | 7,216,574 | ​ | $ | 6,274,650 | ​ | $ | 22,560,998 | ​ | $ | 19,114,653
Bulk revenue | ​ |  | 8,488,615 | ​ |  | 8,667,931 | ​ |  | 25,975,483 | ​ |  | 24,442,324
Services revenue | ​ |  | 29,427,664 | ​ |  | 8,731,124 | ​ |  | 66,243,328 | ​ |  | 18,530,427
Manufacturing revenue | ​ |  | 4,721,222 | ​ |  | 1,378,000 | ​ |  | 12,180,519 | ​ |  | 3,589,333
Total revenue | ​ | $ | 49,854,075 | ​ | $ | 25,051,705 | ​ | $ | 126,960,328 | ​ | $ | 65,676,737
​ ​ ​ ​ ​ ​ Services revenue consists of the following: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended September 30, |  | Nine Months Ended September 30,
​ |  | 2023 |  | 2022 |  | 2023 |  | 2022
Construction revenue | ​ | $ | 24,204,446 | ​ | $ | 4,781,613 | ​ | $ | 52,563,822 | ​ | $ | 5,347,023
Operations and maintenance revenue | ​ |  | 5,021,081 | ​ |  | 3,394,142 | ​ |  | 12,750,902 | ​ |  | 10,740,623
Design and consulting revenue | ​ |  | 202,137 | ​ |  | 555,369 | ​ |  | 928,604 | ​ |  | 2,442,781
Total services revenue | ​ | $ | 29,427,664 | ​ | $ | 8,731,124 | ​ | $ | 66,243,328 | ​ | $ | 18,530,427
​
Summary of revenue recognized and amounts billed on services segment and manufacturing segment contracts in progress | Revenue recognized and amounts billed on contracts in progress are summarized as follows:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | September 30, | ​ | December 31, | ​
​ | ​ | 2023 | ​ | 2022 | ​
Revenue recognized to date on contracts in progress |  | $ | 86,655,434 | ​ | $ | 25,469,014 | ​
Amounts billed to date on contracts in progress | ​ |  | (94,162,641) | ​ |  | (33,407,182) | ​
Retainage | ​ | ​ | 6,951,198 | ​ | ​ | 2,047,969 | ​
Net contract liability | ​ | $ | (556,009) | ​ | $ | (5,890,199) | ​
Summary of net balances of billings reflected in the accompanying consolidated balance sheet | The above net balances are reflected in the accompanying condensed consolidated balance sheets as follows:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | September 30, | ​ | December 31, | ​
​ | ​ | 2023 | ​ | 2022 | ​
Contract assets |  | $ | 8,972,740 |  | $ | 2,913,722 | ​
Contract liabilities | ​ |  | (9,528,749) | ​ |  | (8,803,921) | ​
Net contract liability | ​ | $ | (556,009) | ​ | $ | (5,890,199) | ​

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- Definition Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-10 + Details
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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-5 + Details
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