Accounts Receivable (Details) - USD ($)	Sep. 30, 2020	Dec. 31, 2019
Summary of accounts receivable
Total gross receivables	$ 5,122,915	$ 1,887,080
Less: allowance for doubtful accounts	(785,895)	(785,895)
Total net receivables	4,337,020	1,101,185
Construction services [Member]
Summary of accounts receivable
Total gross receivables	4,475,588	1,321,575
Engineering services [Member]
Summary of accounts receivable
Total gross receivables	5,232	14,594
Retainage receivable [Member]
Summary of accounts receivable
Total gross receivables	615,136	544,911
Other receivable [Member]
Summary of accounts receivable
Total gross receivables	$ 26,959	$ 6,000

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
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Name:	us-gaap_AccountsReceivableNetCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant