Quarterly report pursuant to Section 13 or 15(d)

Accounts Receivable (Details)

v3.21.1
Accounts Receivable (Details) - USD ($)
Mar. 31, 2021
Dec. 31, 2020
Summary of accounts receivable    
Total gross receivables $ 4,012,821 $ 3,431,522
Less: allowance for doubtful accounts (795,914) (795,914)
Total net receivables 3,216,907 2,635,608
Construction services [Member]    
Summary of accounts receivable    
Total gross receivables 2,049,179 1,391,555
Engineering services [Member]    
Summary of accounts receivable    
Total gross receivables 68,223 86,264
Medical [Member]    
Summary of accounts receivable    
Total gross receivables 1,098,271 1,157,819
Retainage receivable [Member]    
Summary of accounts receivable    
Total gross receivables 615,136 615,136
Other receivable [Member]    
Summary of accounts receivable    
Total gross receivables $ 182,012 $ 180,748