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Accounting policies (Tables) | 6 Months Ended
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Jun. 30, 2024
Accounting policies |
Schedule of Disaggregation of revenue | The following table presents the Company’s revenue disaggregated by revenue source. ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended June 30, |  | Six Months Ended June 30,
​ |  | 2024 |  | 2023 |  | 2024 |  | 2023
Retail revenue | ​ | $ | 8,181,884 | ​ | $ | 7,573,329 | ​ | $ | 16,806,822 | ​ | $ | 15,344,424
Bulk revenue | ​ |  | 8,447,958 | ​ |  | 8,482,495 | ​ |  | 16,790,052 | ​ |  | 17,486,868
Services revenue | ​ |  | 11,922,469 | ​ |  | 24,093,963 | ​ |  | 29,340,080 | ​ |  | 36,815,664
Manufacturing revenue | ​ |  | 3,926,847 | ​ |  | 4,087,476 | ​ |  | 9,231,594 | ​ |  | 7,459,297
Total revenue | ​ | $ | 32,479,158 | ​ | $ | 44,237,263 | ​ | $ | 72,168,548 | ​ | $ | 77,106,253
​ Services revenue consists of the following: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended June 30, |  | Six Months Ended June 30,
​ |  | 2024 |  | 2023 |  | 2024 |  | 2023
Construction revenue | ​ | $ | 3,324,610 | ​ | $ | 19,827,827 | ​ | $ | 12,528,274 | ​ | $ | 28,521,342
Operations and maintenance revenue | ​ |  | 7,068,922 | ​ |  | 4,044,015 | ​ |  | 14,168,275 | ​ |  | 7,729,821
Design and consulting revenue | ​ |  | 1,528,937 | ​ |  | 222,121 | ​ |  | 2,643,531 | ​ |  | 564,501
Total services revenue | ​ | $ | 11,922,469 | ​ | $ | 24,093,963 | ​ | $ | 29,340,080 | ​ | $ | 36,815,664
​
Summary of revenue recognized and amounts billed on contracts in progress | Revenue recognized and amounts billed on contracts in progress are summarized as follows:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | June 30, | ​ | December 31, | ​
​ | ​ | 2024 | ​ | 2023 | ​
Revenue recognized to date on contracts in progress |  | $ | 125,716,611 | ​ | $ | 108,952,682 | ​
Amounts billed to date on contracts in progress | ​ |  | (129,687,174) | ​ |  | (101,724,459) | ​
Retainage | ​ | ​ | 3,673,945 | ​ | ​ | 8,087,823 | ​
Net contract asset /(liability) | ​ | $ | (296,618) | ​ | $ | 15,316,046 | ​
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:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | June 30, | ​ | December 31, | ​
​ | ​ | 2024 | ​ | 2023 | ​
Contract assets |  | $ | 5,413,780 |  | $ | 21,553,057 | ​
Contract liabilities | ​ |  | (5,710,398) | ​ |  | (6,237,011) | ​
Net contract asset /(liability) | ​ | $ | (296,618) | ​ | $ | 15,316,046 | ​

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- Definition The tabular disclosure of revenue recognized and amounts billed on services segment and manufacturing segment contracts in progress. + References No definition available. + Details
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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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