Revenue Recognition - Estimated Revenue Expected to be Recognized in Future Related to Performance Obligations (Details) - License and royalty revenue $ in Thousands	Sep. 30, 2020 USD ($)
Remainder 2020
Revenue, Remaining Performance Obligation	$ 400
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Year	2020
2021
Revenue, Remaining Performance Obligation	$ 0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Year	2021

Year in which remaining performance obligation is expected to be recognized, in CCYY format.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 13
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130556-203045

Name:	us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionYear1
Namespace Prefix:	us-gaap_
Data Type:	us-types:gYearListItemType
Balance Type:	na
Period Type:	instant