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The amount of interest expense related to the sale of future revenue.

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The maximum amount of payments receivable for license fees and substantive milestones under the collaboration agreement.

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The maximum amount of payments receivable for milestones under the collaboration agreement.

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Milestone payment received during the period.

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Royalty guaranteed period in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of royalties receivable related to the sale of future revenue.

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Amount of derecognized financial assets from transactions, classified as current, which comprise an initial transfer and an agreement entered into in contemplation of the initial transfer resulting in retention of substantially all of the exposure to the economic return throughout the term of the transaction, at the date of derecognition.

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Amount of payments to be received during the period.

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Amount of amortization expense attributable to debt issuance costs.

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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The cash outflow for loan and debt issuance costs.

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Proceeds from securitizations of receivables treated as collateralized borrowings, which are classified as financing transactions.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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Sale of Future Revenue (Details) - USD ($) $ in Thousands		3 Months Ended	12 Months Ended
Sale of Future Revenue (Details) - USD ($) $ in Thousands	Nov. 03, 2020	Jun. 30, 2020	Dec. 31, 2020	Dec. 31, 2019
Sale of Future Revenue [Abstract]
Proceeds from sale of future revenue			$ 50,000	$ 0
Activity of Royalty Obligation [Abstract]
Issuance costs			(2,909)	(3,946)
Interest expense related to the sale of future revenue			1,938	0
Liability related to the sale of future revenue, current			1,450	$ 0
Purchase and Sale Agreement with an Affiliate of Marathon Asset Management [Member]
Sale of Future Revenue [Abstract]
Upfront payment received	$ 40,000		40,000
Additional payment received through the achievement of first milestone	10,000		10,000
Aggregate payments received			50,000
Maximum amount of payments receivable under agreement			$ 125,000
Effective annual interest rate			24.90%
Activity of Royalty Obligation [Abstract]
Upfront proceeds from the sale of future revenue	40,000		$ 40,000
Contingent payment from the sale of future revenue	$ 10,000		10,000
Issuance costs			(2,909)
Amortization of issuance costs			20
Royalties related to the sale of future revenue			(75)
Interest expense related to the sale of future revenue			1,938
Liability related to the sale of future revenue, net (includes current portion of $1,450)			48,974
Liability related to the sale of future revenue, current			1,450
Purchase and Sale Agreement with an Affiliate of Marathon Asset Management [Member] \| Royalty [Member]
Sale of Future Revenue [Abstract]
Proceeds from sale of future revenue			50,000
Purchase and Sale Agreement with an Affiliate of Marathon Asset Management [Member] \| Maximum [Member]
Sale of Future Revenue [Abstract]
Contingent payments receivable			75,000
License Agreement with Sunovion Pharmaceuticals, Inc. [Member]
Sale of Future Revenue [Abstract]
Upfront payment received			5,000
Aggregate payments received			$ 22,000
Guaranteed royalty period			8 years
Activity of Royalty Obligation [Abstract]
Upfront proceeds from the sale of future revenue			$ 5,000
License Agreement with Sunovion Pharmaceuticals, Inc. [Member] \| Royalty [Member]
Sale of Future Revenue [Abstract]
Revenues		$ 8,000
License Agreement with Sunovion Pharmaceuticals, Inc. [Member] \| Minimum [Member]
Sale of Future Revenue [Abstract]
Guaranteed royalty revenue		1,000
License Agreement with Sunovion Pharmaceuticals, Inc. [Member] \| Minimum [Member] \| Royalty [Member]
Sale of Future Revenue [Abstract]
Revenues		$ 8,000