Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events (Details)

Subsequent Events (Details) - Subsequent Event - Kuros Biosciences AG, Kuros US LLC and Kuros Royalty Fund (US) LLC - Royalty Purchase Agreement
$ in Millions
Jul. 14, 2021
USD ($)
Subsequent Event [Line Items]  
Royalties entity has right to receive (as a percent) 100.00%
Pre-commercial milestone payments $ 25.0
Upfront payment $ 7.0