Beneficial ownership limitation notice period.

No definition available.

Name:	tsha_BeneficialOwnershipLimitationNoticePeriod
Namespace Prefix:	tsha_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Increase or decrease in beneficial ownership limitation percentage.

+ References

No definition available.

+ Details

Name:	tsha_IncreaseOrDecreaseInBeneficialOwnershipLimitationPercentage
Namespace Prefix:	tsha_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Payments to investors as additional liquidated damages percentage.

+ References

No definition available.

+ Details

Name:	tsha_PaymentsToInvestorsAsAdditionalLiquidatedDamagesPercentage
Namespace Prefix:	tsha_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Payments to investors as liquidated damages.

+ References

No definition available.

+ Details

Name:	tsha_PaymentsToInvestorsAsLiquidatedDamages
Namespace Prefix:	tsha_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Pro rata payments to Investors as liquidated damages.

+ References

No definition available.

+ Details

Name:	tsha_ProRataPaymentsToInvestorsAsLiquidatedDamages
Namespace Prefix:	tsha_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- 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 https://asc.fasb.org/extlink&oid=126973232&loc=d3e21475-112644

+ Details

Name:	us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

+ References

+ Details

Name:	us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- 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 https://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

- Definition

Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

+ References

+ Details

Name:	us-gaap_CommonStockSharesIssued
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The cash inflow from the additional capital contribution to the entity.

+ 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 https://asc.fasb.org/extlink&oid=126954810&loc=d3e3255-108585

+ Details

Name:	us-gaap_ProceedsFromIssuanceOfCommonStock
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- 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

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

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

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TypeOfArrangementAxis=tsha_SecuritiesPurchaseAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ClassOfWarrantOrRightAxis=tsha_PreFundedWarrantsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Subsequent Events - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands			6 Months Ended
	Aug. 14, 2023	Aug. 11, 2023	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Subsequent Event [Line Items]
Common stock, shares issued			64,432,637		63,207,507
Common stock, par value per share			$ 0.00001		$ 0.00001
Gross proceeds from issuance of common stock				$ 11,640
Private Placement
Subsequent Event [Line Items]
Gross proceeds from issuance of common stock			$ 500
Subsequent Event \| Purchase Agreement
Subsequent Event [Line Items]
Pro rata payments to Investors as liquidated damages	1.00%
Subsequent Event \| Purchase Agreement \| Pre Funded Warrants
Subsequent Event [Line Items]
Exercise price of warrants per share		$ 0.001
Payments to investors as liquidated damages		2.00%
Payments to investors as additional liquidated damages percentage		2.00%
Subsequent Event \| Purchase Agreement \| Private Placement
Subsequent Event [Line Items]
Common stock, shares issued		122,412,376
Common stock, par value per share		$ 0.00001
Beneficial ownership limitation notice period (in days)		61 days
Increase or decrease in beneficial ownership limitation percentage		19.99%
Gross proceeds from issuance of common stock	$ 150,000
Subsequent Event \| Purchase Agreement \| Private Placement \| Pre Funded Warrants
Subsequent Event [Line Items]
Warrants to purchase share of common stock		44,250,978
Purchase price per share of common stock		$ 0.90
Exercise price of warrants per share		$ 0.001