Accounts Receivable (Details) - USD ($)	Mar. 31, 2022	Dec. 31, 2021
Summary of accounts receivable
Total gross receivables	$ 3,387,617	$ 3,880,762
Less: allowance for doubtful accounts	(963,116)	(963,116)
Total net receivables	2,424,501	2,917,646
Construction services [Member]
Summary of accounts receivable
Total gross receivables	2,370,435	2,293,187
Engineering services [Member]
Summary of accounts receivable
Total gross receivables	11,795	86,388
Medical [Member]
Summary of accounts receivable
Total gross receivables	122,939	679,446
Retainage receivable [Member]
Summary of accounts receivable
Total gross receivables	686,560	635,049
Other receivable [Member]
Summary of accounts receivable
Total gross receivables	$ 195,888	$ 186,692