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COMMITMENTS AND CONTINGENCIES, Registration Rights (Details) | Sep. 14, 2020 Individuals
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Registration and Stockholder Rights [Abstract] |
Number of individuals can be nominated for election in board of directors by 50% funders share holder | 3
Number of individuals can be nominated for election in board of directors by 30% funders share holder | 2
Number of individuals can be nominated for election in board of directors by 20% funders share holder | 1
Maximum [Member] |
Registration and Stockholder Rights [Abstract] |
Number of demands eligible security holder can make | 2
Minimum [Member] |
Registration and Stockholder Rights [Abstract] |
Threshold percentage of outstanding registrable securities holder, to make demand | 20.00%

X
- Definition Represents the number of demands eligible security holder can make. + References No definition available. + Details
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Data Type: | xbrli:integerItemType
Balance Type: | na
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X
- Definition Represents the number of individuals can be nominated for election in board of directors by 20% funders share holder. + References No definition available. + Details
Name: | sbg_NumberOfIndividualsCanBeNominatedForElectionInBoardOfDirectorsBy20FundersShareHolder
Namespace Prefix: | sbg_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the number of individuals can be nominated for election in board of directors by 30% funders share holder. + References No definition available. + Details
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Namespace Prefix: | sbg_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the number of individuals can be nominated for election in board of directors by 50% funders share holder. + References No definition available. + Details
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Namespace Prefix: | sbg_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- References No definition available. + Details
Name: | sbg_RegistrationAndStockholderRightsAbstract
Namespace Prefix: | sbg_
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X
- Definition Required percentage of outstanding registrable securities holder eligible to make demand. + References No definition available. + Details
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Namespace Prefix: | sbg_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |