Name:	sgbx_RevenueFromContractWithSegmentsCustomerExcludingAssessedTax
Namespace Prefix:	sgbx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Percentage, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

No definition available.

Name:	sgbx_RevenueFromContractWithSegmentsCustomerExcludingAssessedTaxPercentage
Namespace Prefix:	sgbx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Amount of revenue recognized from building or developing real estate segment.

No definition available.

Name:	sgbx_TotalConstructionRevenueSegment
Namespace Prefix:	sgbx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The percentage of the revenue recognized from building or developing real estate segment.

No definition available.

Name:	sgbx_TotalConstructionRevenueSegmentPercentage
Namespace Prefix:	sgbx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Amount of revenue recognized from service provided for prevention, maintenance, diagnosis or treatment of physical and mental health.

No definition available.

Name:	sgbx_TotalMedicalRevenueSegment
Namespace Prefix:	sgbx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The percentage of the service provided for prevention, maintenance, diagnosis or treatment of physical and mental health.

No definition available.

Name:	sgbx_TotalMedicalRevenueSegmentPercentage
Namespace Prefix:	sgbx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_DisaggregationOfRevenueLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Name:	srt_ProductOrServiceAxis=us-gaap_GovernmentContractMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	srt_ProductOrServiceAxis=sgbx_HospitalityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	srt_ProductOrServiceAxis=sgbx_MultiFamiliesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	srt_ProductOrServiceAxis=sgbx_MedicalConstructionServicesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	srt_ProductOrServiceAxis=sgbx_OfficeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	srt_ProductOrServiceAxis=us-gaap_RetailMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: