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Accounting policies - Revenue recognized and billed on services (Details) - USD ($) | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2023 | Dec. 31, 2022
Accounting policies |  |
Revenue recognized to date on contracts in progress | $ 58,727,821 | $ 25,469,014
Amounts billed to date on contracts in progress | (68,535,879) | (33,407,182)
Retainage | 5,072,338 | 2,047,969
Net contract asset | (4,735,720) | (5,890,199)
Contract assets | 8,192,770 | 2,913,722
Contract liabilities | (12,928,490) | (8,803,921)
Net contract liability | $ (4,735,720) | $ (5,890,199)

X
- Definition Amount, after allowance for credit loss and obligation to transfer good or service to customer for which consideration has been received or is receivable, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time, classified as current. + References No definition available. + Details
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Balance Type: | debit
Period Type: | instant

X
- Definition Represents the amounts billed to date on contracts in progress. + References No definition available. + Details
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- Definition Represents the total revenue recognized and amount billed on contracts in progress. + References No definition available. + Details
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- Definition Amount of retainage with contract for customers. + References No definition available. + Details
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- Definition Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due. + References No definition available. + Details
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- Definition Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time, classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479837/606-10-45-3 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479837/606-10-45-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-8 + Details
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