Quarterly report pursuant to Section 13 or 15(d)

Accounts Receivable (Details)

v3.21.2
Accounts Receivable (Details) - USD ($)
Jun. 30, 2021
Dec. 31, 2020
Summary of accounts receivable    
Total gross receivables $ 3,676,829 $ 3,431,522
Less: allowance for doubtful accounts (957,116) (795,914)
Total net receivables 2,719,713 2,635,608
Construction services [Member]    
Summary of accounts receivable    
Total gross receivables 2,111,793 1,391,555
Engineering services [Member]    
Summary of accounts receivable    
Total gross receivables 21,364 86,264
Medical [Member]    
Summary of accounts receivable    
Total gross receivables 679,578 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 $ 248,958 $ 180,748