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v3.20.2

Commitment and Contingencies - Additional Information (Details) | Jan. 21, 2020 USD ($) RNL $ / RNL | Nov. 18, 2015 USD ($)
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Royalty-Linked Notes | Private Placement |  |
Other Commitments [Line Items] |  |
Aggregate principal amount | $ 2,579,400 |
Debt instrument outstanding portion | $ / RNL | 0.04 |
Debt instrument note price per unit | $ / RNL | 2.00 |
Debt instrument maturity date | Dec. 31, 2045 |
Debt instrument, aggregate potential payment capped value | $ 160,000 |
Debt instrument, aggregate potential payment capped rate | 4,000 |
Number of debt instruments within each notes | RNL | 50 |
Maximum return amount for each unit | $ 8,000,000 |
Pfizer License Agreement | Royalty-Linked Notes | Private Placement |  |
Other Commitments [Line Items] |  |
Aggregate principal amount | $ 2,579,400 |
Debt instrument outstanding portion | $ / RNL | 0.04 |
Debt instrument note price per unit | $ / RNL | 2.00 |
Debt instrument maturity date | Dec. 31, 2045 |
Debt instrument, aggregate potential payment capped value | $ 160,000 |
Debt instrument, aggregate potential payment capped rate | 4,000 |
Number of debt instruments within each notes | RNL | 50 |
Maximum return amount for each unit | $ 8,000,000 |
Pfizer License Agreement | Minimum |  |
Other Commitments [Line Items] |  |
Potential future regulatory milestone and sales milestone payments upon achievement of net sales |  | $ 250,000,000
Pfizer License Agreement | Maximum |  |
Other Commitments [Line Items] |  |
Potential future regulatory milestone and sales milestone payments upon achievement of net sales |  | $ 1,000,000,000

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