XML 48 R37.htm IDEA: XBRL DOCUMENT v3.21.2

Related-Party Transactions (Details)	Dec. 31, 2020
Takeda
Related Party Transaction [Line Items]
Shareholder ownership percentage	0.050

X

- Definition

Shareholder Ownership Percentage

+ References

No definition available.

+ Details

Name:	sttk_ShareholderOwnershipPercentage
Namespace Prefix:	sttk_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

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_RelatedPartyTransactionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	dei_LegalEntityAxis=sttk_TakedaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: