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Accounting policies (Tables) | 3 Months Ended
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Mar. 31, 2025
Accounting policies |
Schedule of Disaggregation of revenue | The following table presents the Company’s revenue disaggregated by revenue source. ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended March 31, |
​ |  | 2025 |  | 2024 |
Retail revenue | ​ | $ | 9,411,342 | ​ | $ | 8,624,938 | ​
Bulk revenue | ​ |  | 8,411,716 | ​ |  | 8,342,094 | ​
Services revenue | ​ |  | 10,078,268 | ​ |  | 17,417,611 | ​
Manufacturing revenue | ​ |  | 5,814,059 | ​ |  | 5,304,747 | ​
Total revenue | ​ | $ | 33,715,385 | ​ | $ | 39,689,390 | ​
​ Services revenue consists of the following: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended March 31, |
​ |  | 2025 |  | 2024 |
Construction revenue | ​ | $ | 2,218,230 | ​ | $ | 9,203,662 | ​
Operations and maintenance revenue | ​ |  | 7,725,298 | ​ |  | 7,099,354 | ​
Design and consulting revenue | ​ |  | 134,740 | ​ |  | 1,114,595 | ​
Total services revenue | ​ | $ | 10,078,268 | ​ | $ | 17,417,611 | ​
​
Summary of revenue recognized and amounts billed on contracts in progress | Revenue recognized and amounts billed on contracts in progress are summarized as follows:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | March 31, | ​ | December 31, | ​
​ | ​ | 2025 | ​ | 2024 |
Revenue recognized to date on contracts in progress |  | $ | 111,400,995 | ​ | $ | 114,590,991 | ​
Amounts billed to date on contracts in progress | ​ |  | (117,315,578) | ​ |  | (121,833,354) | ​
Retainage | ​ | ​ | 3,030,454 | ​ | ​ | 2,585,952 | ​
Net contract asset /(liability) | ​ | $ | (2,884,129) | ​ | $ | (4,656,411) | ​
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:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | March 31, | ​ | December 31, | ​
​ | ​ | 2025 | ​ | 2024 | ​
Contract assets |  | $ | 9,517,668 |  | $ | 4,470,243 | ​
Contract liabilities | ​ |  | (12,401,797) | ​ |  | (9,126,654) | ​
Net contract asset /(liability) | ​ | $ | (2,884,129) | ​ | $ | (4,656,411) | ​

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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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