Subsequent Events - 2020 RPI Funding Agreement (Details) - Subsequent Event - 2020 RPI Funding Agreement $ in Thousands	Aug. 10, 2020 USD ($)
License and other agreements
Sales-based participation rights sold, value	$ 250,000
Sales-based participation rights percentage	0.40%
Proceeds from sale of sales-based participation rights	$ 150,000
Receivable related to sales-based participation rights	$ 100,000
Period from closing for repurchase if change of control consummated	180 days
Buy-Back option factor	2.0
Success-based milestone payments based on first zavegepant regulatory approval, relative to funded amount	1.9
Time period for success-based milestone payments	10 years
Minimum
License and other agreements
Success-based milestone payments based on regulatory approval, relative to funded amount	0.6
Maximum
License and other agreements
Sales-based participation rights percentage	3.00%
Success-based milestone payments based on regulatory approval, relative to funded amount	2.95