Minimum amount to be expended to satisfy the terms of arrangements in which the entity has agreed to expend funds to procure goods or services, excluding long-term purchase commitments or unconditional purchase obligations.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(17))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(19))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(25))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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

Commitments and Contingencies (Details) $ in Thousands, € in Millions	9 Months Ended
	Sep. 30, 2020 USD ($)	Jun. 30, 2021 USD ($)	Sep. 30, 2020 EUR (€)	Dec. 31, 2019 USD ($)	Sep. 30, 2014 USD ($)
Long-term Purchase Commitment [Line Items]
Nonrecourse liability related to sale of future royalties, long term	$ 14,960			$ 19,248	$ 30,000
MDD US Enterprises LLC (Formerly USWM Enterprises)
Long-term Purchase Commitment [Line Items]
Annual minimum purchase quantity requirement amount \| €			€ 3.0
Commitment period	5 years
Spend commitment amount	$ 4,100
MDD US Enterprises LLC (Formerly USWM Enterprises) \| Forecast
Long-term Purchase Commitment [Line Items]
Spend commitment amount		$ 2,100