Accounts Receivable (Details) - USD ($)	Jun. 30, 2020	Dec. 31, 2019
Summary of accounts receivable
Total gross receivables	$ 2,370,147	$ 1,887,080
Less: allowance for doubtful accounts	(785,895)	(785,895)
Total net receivables	1,584,252	1,101,185
Construction services [Member]
Summary of accounts receivable
Total gross receivables	1,773,473	1,321,575
Engineering services [Member]
Summary of accounts receivable
Total gross receivables	44,263	14,594
Retainage receivable [Member]
Summary of accounts receivable
Total gross receivables	543,416	544,911
Other receivable [Member]
Summary of accounts receivable
Total gross receivables	$ 8,995	$ 6,000