XML 77 R45.htm IDEA: XBRL DOCUMENT
v3.22.1

Stockholders' Equity (Deficit) - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands |  | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jul. 01, 2020 | Sep. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2020 | Dec. 31, 2021
Class of Stock [Line Items] |  |  |  |  |
Common stock, par value |  |  |  | $ 0.0001 | $ 0.0001
Common stock, shares authorized |  |  |  | 200,000,000 | 200,000,000
Preferred stock , shares authorized |  |  |  | 10,000,000 | 10,000,000
Preferred stock, par value |  |  |  | $ 0.0001 | $ 0.0001
Redeemable Convertible Preferred Stock [Member] |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Accretion to Redemption value |  |  |  | $ 0 |
Redeemable Stock Excersible On Agreed Upon Milestones [Member] | Redeemable Convertible Preferred Stock [Member] |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Issuance of Series B redeemable convertible preferred stock |  |  | 21,732,862 |  |
Proceeds from Issuance of Convertible Preferred Stock |  |  | $ 46,900 |  |
Series B [Member] | Redeemable Convertible Preferred Stock [Member] |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Issuance of Series B redeemable convertible preferred stock |  |  | 14,701,054 |  |
Issuance of Series B redeemable convertible preferred stock for cash | 10,669,834 | 11,063,028 | 4,673,388 |  |
Issuance of Series B redeemable convertible preferred stock upon conversion of convertible notes |  |  | 10,027,666 |  |
Preferred stock, Par or Stated Value Per Share | $ 2.16 | $ 2.16 | $ 2.16 |  |
Proceeds from Issuance of Convertible Preferred Stock | $ 23,000 | $ 23,900 |  |  |
Series B [Member] | Redeemable Stock Excersible On Agreed Upon Milestones [Member] |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Proceeds from Issuance of Convertible Preferred Stock |  |  | $ 21,500 |  |
Series C [Member] | Redeemable Convertible Preferred Stock [Member] |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Preferred stock, Par or Stated Value Per Share |  | $ 3.41 |  |  |
Proceeds from Issuance of Convertible Preferred Stock |  | $ 84,900 |  |  |
Issuance of series C redeemable convertible preferred stock for cash |  | 24,926,685 |  |  |

X
- Definition Issuance of Series B redeemable convertible preferred stock for cash. + References No definition available. + Details
Name: | sbtx_IssuanceOfSeriesBRedeemableConvertiblePreferredStockForCash
Namespace Prefix: | sbtx_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Issuance of series C redeemable convertible preferred stock for cash. + References No definition available. + Details
Name: | sbtx_IssuanceOfSeriesCRedeemableConvertiblePreferredStockForCash
Namespace Prefix: | sbtx_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Temporary Equity Stock Issued During Period Issues Value on Conversion of Convertible Notes. + References No definition available. + Details
Name: | sbtx_TemporaryEquityStockIssuedDuringPeriodIssuesValueOnConversionOfConvertibleNotes
Namespace Prefix: | sbtx_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of shares of new stock classified as temporary equity issued during the period. + References No definition available. + Details
Name: | sbtx_TemporaryEquityStockIssuedDuringPeriodSharesNewIssues
Namespace Prefix: | sbtx_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ClassOfStockLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Face amount or stated value per share of common stock. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_CommonStockParOrStatedValuePerShare
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition The maximum number of common shares permitted to be issued by an entity's charter and bylaws. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_CommonStockSharesAuthorized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123467817&loc=SL123496158-112644 + Details
Name: | us-gaap_PreferredStockParOrStatedValuePerShare
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_PreferredStockSharesAuthorized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The cash inflow from issuance of preferred stocks identified as being convertible into another form of financial instrument, typically the entity's common stock. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3255-108585 + Details
Name: | us-gaap_ProceedsFromIssuanceOfConvertiblePreferredStock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Value of accretion of temporary equity to its redemption value during the period. + References No definition available. + Details
Name: | us-gaap_TemporaryEquityAccretionToRedemptionValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=sbtx_RedeemableStockExcersibleOnAgreedUponMilestonesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AuctionMarketPreferredSecuritiesStockSeriesAxis=us-gaap_SeriesBMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AuctionMarketPreferredSecuritiesStockSeriesAxis=sbtx_SeriesCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |