Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events (Details)

v3.21.2
Subsequent Events (Details) - CAMP4 - Subsequent Event
$ in Millions
Jul. 06, 2021
USD ($)
shares
Subsequent Event [Line Items]  
Upfront payment $ 1.5
Upfront payment (in shares) | shares 3,373,008
Percent of outstanding shares 5.00%
Period following first commercial sale in a country 10 years
Dravet Syndrome Products  
Subsequent Event [Line Items]  
Development milestone payments $ 3.5
Sales milestone payments $ 90.0
Development milestone payments (in shares) | shares 5,782,299
Non-Dravet Syndrome Products  
Subsequent Event [Line Items]  
Development milestone payments $ 4.0
Sales milestone payments $ 90.0
Development milestone payments (in shares) | shares 1,082,248