Long-term Borrowing - Additional Information (Details) - USD ($) $ in Thousands |
3 Months Ended | |||||
|---|---|---|---|---|---|---|
Jan. 11, 2026 |
Jun. 27, 2025 |
Jun. 28, 2024 |
Sep. 05, 2023 |
Mar. 31, 2026 |
Dec. 31, 2025 |
|
| Short-Term Debt [Line Items] | ||||||
| Amendment, description | On January 11, 2026, the Company entered into the Third Amendment, which among other things, (i) extended the draw period of Term Loan A to January 31, 2027, (ii) extended the draw period of Term Loan B to January 31, 2027, (iii) extended the draw period of Term Loan C to January 31, 2027, and (iv) extended the maturity date to January 1, 2029 ("Maturity Date"). Based on the occurrence of specified (a) development milestones related to the pivotal Phase 3 OPERA-01 clinical trial of palazestrant or (b) receipt of proceeds from capital financing, the draw period of Term Loan B and Term Loan C may be further extended to July 31, 2027, and the Maturity Date may be further extended to July 1, 2029. | |||||
| Long-term borrowing | $ 3,000 | $ 3,000 | ||||
| Maximum | Other Income | ||||||
| Short-Term Debt [Line Items] | ||||||
| Interest expense | $ 100 | |||||
| Senior Secured Loan Facility | ||||||
| Short-Term Debt [Line Items] | ||||||
| Term of loan agreement | 4 years | |||||
| Aggregate principal amount | $ 50,000 | $ 50,000 | ||||
| Amount available for draw down, Private placement. | 25,000 | |||||
| Amount available for draw down, Lenders discretion | $ 25,000 | |||||
| Maturity date | Aug. 01, 2027 | |||||
| Interest rate | 6.00% | |||||
| Incremental interest rate at the event of default | 3.00% | |||||
| Amendment of Original Loan Agreement | ||||||
| Short-Term Debt [Line Items] | ||||||
| Aggregate principal amount | 100,000 | |||||
| Amount available for draw down, Lenders discretion | $ 50,000 | |||||
| Maturity date | Jan. 01, 2029 | Jan. 15, 2026 | Jul. 01, 2028 | |||
| Amount currently available for draw down | $ 25,000 | |||||
| Amount available for draw down upon achieving certain milestones related to execution of first line pivotal phase 3 | $ 25,000 | |||||
| Amendment of Original Loan Agreement | Term Loan A | ||||||
| Short-Term Debt [Line Items] | ||||||
| Maturity date | Jan. 31, 2027 | |||||
| Amendment of Original Loan Agreement | Term Loan B | ||||||
| Short-Term Debt [Line Items] | ||||||
| Maturity date | Jan. 31, 2027 | |||||
| Amendment of Original Loan Agreement | Term Loan C | ||||||
| Short-Term Debt [Line Items] | ||||||
| Maturity date | Jan. 31, 2027 |