Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information

Document and Entity Information - shares
9 Months Ended
Sep. 30, 2022
Nov. 14, 2022
Cover [Abstract]    
Entity Registrant Name SG BLOCKS, INC.  
Entity Central Index Key 0001023994  
Trading Symbol SGBX  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Document Type 10-Q  
Document Quarterly Report true  
Document Transition Report false  
Document Period End Date Sep. 30, 2022  
Document Fiscal Period Focus Q3  
Document Fiscal Year Focus 2022  
Entity Filer Category Non-accelerated Filer  
Entity Incorporation, State or Country Code DE  
Entity Address, State or Province FL  
Entity Address, Address Line One 5011 Gate Parkway,  
Entity Address, Address Line Two Building 100, Suite 100  
Entity Address, City or Town Jacksonville  
Entity Address, Postal Zip Code 32256  
City Area Code (646)  
Local Phone Number 240-4235  
Title of 12(b) Security Common Stock, par value $0.01 per share  
Security Exchange Name NASDAQ  
Entity Interactive Data Current Yes  
Entity Current Reporting Status Yes  
Entity File Number 001-38037  
Entity Tax Identification Number 95-4463937  
Entity Shell Company false  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Common Stock, Shares Outstanding   12,050,206