Commitments and Contingencies - Collaborative Arrangements And Non-collaborative Arrangement (Details) - WIBR - Maximum $ in Millions	9 Months Ended
Sep. 30, 2019 USD ($)
Collaborative Arrangements and Non-collaborative Arrangement
Aggregate milestone payments	$ 1.6
License maintenance fees
Collaborative Arrangements and Non-collaborative Arrangement
License costs	$ 0.1

The total amount of other operating cost and expense items that are associated with the entity's normal revenue producing operation.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.3)
-URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227

Name:	us-gaap_OtherCostAndExpenseOperating
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration