XML 82 R64.htm IDEA: XBRL DOCUMENT
v3.21.1

INITIAL PUBLIC OFFERING (FY) (Details) - $ / shares |  | 6 Months Ended
--- | --- | ---
Sep. 17, 2020 | Dec. 31, 2020
Public Shares [Member] |  |
Initial Public Offering [Abstract] |  |
Units issued (in shares) |  | 23,000,000
Initial Public Offering [Member] | Public Shares [Member] |  |
Initial Public Offering [Abstract] |  |
Units issued (in shares) | 23,000,000 |
Unit price (in dollars per share) | $ 10.00 |
Initial Public Offering [Member] | Public Warrant [Member] |  |
Initial Public Offering [Abstract] |  |
Number of securities called by each unit (in shares) | 0.5 |
Exercise price of warrant (in dollars per share) | $ 11.50 |
Initial Public Offering [Member] | Class A Common Stock [Member] |  |
Initial Public Offering [Abstract] |  |
Number of securities called by each unit (in shares) | 1 |
Number of securities called by each warrant (in shares) | 1 |
Over-Allotment Option [Member] | Public Shares [Member] |  |
Initial Public Offering [Abstract] |  |
Units issued (in shares) | 3,000,000 |
Unit price (in dollars per share) | $ 10.00 |

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

X
- Definition Number of new units issued during the period. Each Unit consists of one share of Class A common stock and one-half of one redeemable warrant. + References No definition available. + Details
Name: | sbg_UnitsIssuedDuringPeriodSharesNewIssues
Namespace Prefix: | sbg_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of securities into which each unit may be converted. For example, but not limited to, each unit may be converted into two shares of common stock. + References No definition available. + Details
Name: | sbg_UnitsNumberOfSecuritiesCalledByUnits
Namespace Prefix: | sbg_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644 + Details
Name: | us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares. + References No definition available. + Details
Name: | us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Per share or per unit amount of equity securities issued. + References No definition available. + Details
Name: | us-gaap_SharesIssuedPricePerShare
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=sbg_PublicSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=us-gaap_IPOMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=sbg_PublicWarrantMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=us-gaap_OverAllotmentOptionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |