Quarterly report pursuant to Section 13 or 15(d)

Accounts Receivable

Accounts Receivable

3 Months Ended

Mar. 31, 2019

4.	Accounts Receivable

At March 31, 2019 and December 31, 2018, the Company’s accounts receivable consisted of the following:

	March 31, 2019			December 31, 2018
Billed:
Block sales	$	—		$	14,723
Construction services		2,826,999			1,619,498
Engineering services		416,894			400,877
Retainage receivable		544,910			543,417
Other receivable		7,706			7,706
Total gross receivables		3,796,509			2,586,221
Less: allowance for doubtful accounts ⁽¹⁾		(839,895	)		(839,895	)
Total net receivables	$	2,956,614		$	1,746,326
⁽¹⁾ The allowance for doubtful accounts is primarily due to unpaid billings on a contract that is currently in dispute.

Receivables are evaluated for collectability and allowances for potential losses are established or maintained on applicable receivables. The allowance for doubtful accounts was $839,895 as of March 31, 2019. There was no provision for doubtful accounts and no write offs for the three months ended March 31, 2019. The provision for doubtful accounts was $810,580 and write offs were $4,920 for the year ended December 31, 2018.