XML 63 R51.htm IDEA: XBRL DOCUMENT
v3.19.1

Construction Backlog (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Construction Backlog [Abstract] |  |
Balance - beginning of period | $ 76,659,029 | $ 541,291
New contracts and change orders during the period | 29,189,062 | 81,179,323
Construction backlog, gross | 105,848,091 | 81,720,614
Less: contract revenue earned during the period | (8,190,712) | (5,061,585)
Balance - end of period | $ 97,657,379 | $ 76,659,029

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