Condensed Consolidated Statements of Operations - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenue:
Revenue	$ 184,526	$ 2,082,825	$ 2,647,558	$ 5,932,150
Cost of revenue:
Cost of revenue	366,783	1,857,985	2,018,392	5,512,140
Gross profit (loss)	(182,257)	224,840	629,166	420,010
Operating expenses:
Payroll and related expenses	548,156	611,906	1,832,333	1,589,935
General and administrative expenses	478,726	557,078	1,318,390	1,538,441
Marketing and business development expense	63,016	133,378	194,591	311,965
Pre-project expenses	1,275		19,726	49,964
Total	1,091,173	1,302,362	3,365,040	3,490,305
Operating loss	(1,273,430)	(1,077,522)	(2,735,874)	(3,070,295)
Other income (expense):
Other income				5,768
Loss on asset disposal	(52,039)		(52,039)
Loss from equity affiliates		(960)		(960)
Total	(52,039)	(960)	(52,039)	4,808
Loss before income taxes	(1,325,469)	(1,078,482)	(2,787,913)	(3,065,487)
Income tax expense
Net loss	(1,325,469)	(1,078,482)	(2,787,913)	(3,065,487)
Less: Net loss attributable to non-controlling interest		(52,445)		(52,445)
Net loss attributable to common stockholders of SG Blocks, Inc.	$ (1,325,469)	$ (1,026,037)	$ (2,787,913)	$ (3,013,042)
Net loss per share - basic and diluted:
Basic and diluted	$ (0.23)	$ (0.24)	$ (0.56)	$ (0.71)
Weighted average shares outstanding:
Basic and diluted	5,694,748	4,260,041	4,938,547	4,260,041
Blocks sales
Revenue:
Revenue				$ 42,799
Cost of revenue:
Cost of revenue				33,084
Construction services
Revenue:
Revenue	187,895	2,033,769	2,521,139	5,307,168
Cost of revenue:
Cost of revenue	391,494	1,764,030	1,986,394	5,056,971
Engineering services
Revenue:
Revenue	(3,369)	49,056	126,419	582,183
Cost of revenue:
Cost of revenue	$ (24,711)	$ 93,955	$ 31,998	$ 422,085