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v3.20.2

Contract Assets and Contract Liabilities (Details) - USD ($) | Jun. 30, 2020 | Dec. 31, 2019
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Costs and estimated earnings on uncompleted contracts |  |
Costs incurred on uncompleted contracts | $ 622,745 | $ 513,558
Estimated earnings to date on uncompleted contracts | 178,553 | 127,032
Gross contract assets | 801,298 | 640,590
Less: billings to date | (938,319) | (703,532)
Net contract liabilities | $ (137,021) | $ (62,942)

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- Definition The amount of contract assets gross. + References No definition available. + Details
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Namespace Prefix: | sgbx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Contract with customer asset liability + References No definition available. + Details
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Namespace Prefix: | sgbx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Costs in excess of billings to date. + References No definition available. + Details
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Namespace Prefix: | sgbx_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition Costs incurred on uncompleted contracts. + References No definition available. + Details
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Namespace Prefix: | sgbx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Estimated income loss on uncompleted contracts. + References No definition available. + Details
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Namespace Prefix: | sgbx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration