Accounts Receivable (Tables)

12 Months Ended

Dec. 31, 2020

Accounts Receivable [Abstract]

Summary of accounts receivable

		2020		2019
Billed:
Construction services	$	1,391,555		$	1,321,575
Engineering services		86,264			14,594
Medical revenue		1,157,819			—
Retainage receivable		615,136			544,911
Other receivable		180,748			6,000
Total gross receivables		3,431,522			1,887,080
Less: allowance for doubtful accounts		(795,914	)		(785,895	)
Total net receivables	$	2,635,608		$	1,101,185