Line of credit facility straight-line amortization term.

No definition available.

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- Definition

Line of credit facility covenants minimum cash allowed.

+ References

No definition available.

+ Details

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Namespace Prefix:	ortx_
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Balance Type:	debit
Period Type:	instant

- Definition

Line of credit facility interest payments term.

+ References

No definition available.

+ Details

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Namespace Prefix:	ortx_
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Balance Type:	na
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- Definition

Line of credit facility percentage of final payment.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Description of minimum financial levels (for example, tangible net worth and working capital) and achievement of certain financial ratios (for example, working capital ratio and debt service coverage ratio), and adherence to certain clauses which generally require or restrict certain actions (for example, entering into a debt arrangement with equal or greater seniority, and selling or discontinuing a certain business segment or material subsidiary) to be in compliance with the covenant clauses of the debt agreement. May also include a discussion of the adverse consequences that would result if the entity violates or fails to satisfy the covenants.

+ References

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-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
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-Paragraph 1
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The average effective interest rate during the reporting period.

+ References

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-Name Accounting Standards Codification
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+ Details

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- 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

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

- Definition

Amount of the cost of borrowed funds accounted for as interest expense for debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Description of the conditions for borrowing under the credit facility including the nature of any restrictions.

+ References

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Description of the frequency of periodic payments, which may be presented in a variety of ways (for example, monthly, quarterly, annually).

+ References

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Date the credit facility first became available, in YYYY-MM-DD format.

+ References

+ Details

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Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of the required periodic payment applied to interest.

+ References

+ Details

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

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Balance Type:	debit
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- Details

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Notes Payable - Additional Information (Details) - USD ($)	1 Months Ended			12 Months Ended
	Jan. 31, 2023	May 31, 2021	May 31, 2019	Dec. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Line of credit facility agreement date			May 31, 2019
Credit facility maximum borrowings		$ 100,000,000.0	$ 75,000,000.0
Credit facility, remaining borrowings		$ 67,000,000.0
Line of credit facility interest payments term		18 months
Line of credit facility, frequency of payments				monthly payments
Line of credit facility, percentage of final payment		3.50%
Final payment amount		$ 1,200,000
Line of credit facility covenants description				The Company is also subject to an ongoing minimum cash financial covenant in which the Company must maintain unrestricted cash in an amount not less than $20.0 million following the utilization of the second term loan and not less than $35.0 million following the utilization of the third term loan
Term Loan
Debt Instrument [Line Items]
Debt instrument, interest expense				$ 3,000,000.0	$ 2,500,000
Debt instrument, effective annual interest rate				9.20%	8.40%
LIBOR
Debt Instrument [Line Items]
Debt instrument, annual interest rate		5.95%
Minimum
Debt Instrument [Line Items]
Line of credit facility amortization term		18 months
Minimum \| Second Tranche (Term Loan Available from July 1, 2022 to July 1, 2023)
Debt Instrument [Line Items]
Line of credit facility minimum cash financial covenant		$ 20,000,000.0
Minimum \| TThird Tranche (Term Loan Available from July 1, 2023 to July 1, 2024)
Debt Instrument [Line Items]
Line of credit facility minimum cash financial covenant		$ 35,000,000.0
Maximum
Debt Instrument [Line Items]
Line of credit facility amortization term		30 months
Initial Term Loan
Debt Instrument [Line Items]
Credit facility maximum borrowings		$ 33,000,000.0	$ 25,000,000.0
Proceeds from lines of credit		33,000,000.0
Second Tranche (Term Loan Available from July 1, 2022 to July 1, 2023)
Debt Instrument [Line Items]
Credit facility maximum borrowings		$ 33,000,000.0
Line of Credit Facility, Covenant Terms				upon certain regulatory approvals and evidence of the Company having $100 million in cash and cash equivalent investments
Line of credit facility interest payments term		30 months
Third Tranche (Term Loan Available from July 1, 2023 to July 1, 2024)
Debt Instrument [Line Items]
Credit facility maximum borrowings		$ 34,000,000.0
Subsequent Event [Member] \| Amended Credit Facility \| SOFR
Debt Instrument [Line Items]
Debt instrument, annual interest rate	5.95%
Line of credit facility, percentage of final payment	3.50%
Debt instrument, effective annual interest rate	0.10%