Condensed Consolidated Statements of Operations - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenue:
Revenue	$ 727,908	$ 2,305,797	$ 2,463,032	$ 3,849,325
Cost of revenue:
Cost of revenue	460,590	2,274,225	1,651,609	3,654,155
Gross profit	267,318	31,572	811,423	195,170
Operating expenses:
Payroll and related expenses	645,627	572,612	1,284,177	978,029
General and administrative expenses	506,664	555,087	839,664	981,362
Marketing and business development expense	84,216	97,541	131,575	178,588
Pre-project expenses	2,520	45,000	18,451	49,964
Total	1,239,027	1,270,240	2,273,867	2,187,943
Operating loss	(971,709)	(1,238,668)	(1,462,444)	(1,992,773)
Other income (expense):
Interest income				4
Other income		5,764		5,764
Total		5,764		5,768
Loss before income taxes	(971,709)	(1,232,904)	(1,462,444)	(1,987,005)
Income tax expense
Net loss	$ (971,709)	$ (1,232,904)	$ (1,462,444)	$ (1,987,005)
Net loss per share - basic and diluted:
Basic and diluted	$ (0.20)	$ (0.29)	$ (0.32)	$ (0.47)
Weighted average shares outstanding:
Basic and diluted	4,837,629	4,260,041	4,552,004	4,260,041
Blocks sales
Revenue:
Revenue			$ 42,799	$ 42,799
Cost of revenue:
Cost of revenue			33,084	33,084
Construction services
Revenue:
Revenue	675,170	2,262,998	2,333,244	3,806,526
Cost of revenue:
Cost of revenue	435,671	2,241,141	1,594,900	3,621,071
Engineering services
Revenue:
Revenue	52,738		129,788
Cost of revenue:
Cost of revenue	$ 24,919		$ 56,709