XML 65 R55.htm IDEA: XBRL DOCUMENT
v3.21.2

Construction Backlog (Details) - USD ($) | 9 Months Ended
--- | ---
Sep. 30, 2021 | Sep. 30, 2020
Construction Backlog [Abstract] |  |
Balance - beginning of period | $ 25,117,461 | $ 17,634,261
New contracts and change orders during the period | 2,335,996 | 13,816,785
Adjustments and cancellations, net | (1,395,737) | (27,370)
Subtotal | 26,057,720 | 31,423,676
Less: contract revenue earned during the period | (5,983,027) | (6,306,215)
Balance - end of period | $ 20,074,693 | $ 25,117,461

X
- Definition Adjustments and cancellations, net. + References No definition available. + Details
Name: | sgbx_AdjustmentsAndCancellationsNet
Namespace Prefix: | sgbx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | sgbx_ConstructionBacklogAbstract
Namespace Prefix: | sgbx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Construction Backlog Gross + References No definition available. + Details
Name: | sgbx_ConstructionBacklogGross
Namespace Prefix: | sgbx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Construction contracts backlog. + References No definition available. + Details
Name: | sgbx_ConstructionContractsBacklog
Namespace Prefix: | sgbx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of contract revenue. + References No definition available. + Details
Name: | sgbx_ContractRevenue
Namespace Prefix: | sgbx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition New contracts received during the year. + References No definition available. + Details
Name: | sgbx_NewContractsReceivedDuringYear
Namespace Prefix: | sgbx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration