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Description of Operations and Summary of Significant Accounting Policies - Description of Operations (Details) $ in Billions | 12 Months Ended
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Dec. 31, 2025 USD ($) Customer | Dec. 31, 2024 Customer | Dec. 31, 2023
DESCRIPTION OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |  |
Capitalized fees paid, estimated useful life | 15 years |  |
Customer Concentration Risk | Net Product Sales | La Jolla [Member] | Customer One |  |  |
DESCRIPTION OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |  |
Concentration Risk, Percentage | 24.00% | 31.00% | 31.00%
Customer Concentration Risk | Net Product Sales | La Jolla [Member] | Customer Two |  |  |
DESCRIPTION OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |  |
Concentration Risk, Percentage | 22.00% | 24.00% | 27.00%
Customer Concentration Risk | Net Product Sales | La Jolla [Member] | Customer Three |  |  |
DESCRIPTION OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |  |
Concentration Risk, Percentage | 22.00% | 24.00% | 27.00%
Product [Member] |  |  |
DESCRIPTION OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |  |
Number of major customers | Customer | 3 | 3 |
Product [Member] | Customer Concentration Risk | Receivables from Net Product Sales | Customer One |  |  |
DESCRIPTION OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |  |
Concentration Risk, Percentage | 29.00% | 31.00% |
Product [Member] | Customer Concentration Risk | Receivables from Net Product Sales | Customer Two |  |  |
DESCRIPTION OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |  |
Concentration Risk, Percentage | 28.00% | 18.00% |
Product [Member] | Customer Concentration Risk | Receivables from Net Product Sales | Customer Three |  |  |
DESCRIPTION OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |  |
Concentration Risk, Percentage | 16.00% | 15.00% |
Sarissa Capital |  |  |
DESCRIPTION OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |  |
Percentage of common stock owned by a related party |  | 11.60% |
Long-Acting Beta2 Agonist (LABA) Collaboration | GSK | RELVAR/BREO |  |  |
DESCRIPTION OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |  |
Royalty rate for first level of annual global net sales (as a percent) | 15.00% |  |
Annual global sales level used to determine royalty rate | $ | $ 3.0 |  |
Royalty rate for sales above first level of annual global net sales (as a percent) | 5.00% |  |
Long-Acting Beta2 Agonist (LABA) Collaboration | GSK | ANORO | Minimum |  |  |
DESCRIPTION OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |  |
Royalty rate for combination products (as a percent) | 6.50% |  |
Long-Acting Beta2 Agonist (LABA) Collaboration | GSK | ANORO | Maximum |  |  |
DESCRIPTION OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |  |
Royalty rate for combination products (as a percent) | 10.00% |  |

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