Quarterly report pursuant to Section 13 or 15(d)

Apexian Sublicense Agreement (Details)

v3.21.2
Apexian Sublicense Agreement (Details) - USD ($)
$ in Millions
 6 Months Ended
Nov. 05, 2020
Jun. 30, 2021
Jun. 30, 2020
Sublicense Agreement [Abstract]      
Common stock issued (in shares) 7,091,878    
Apexian Sublicense Agreement [Member]      
Sublicense Agreement [Abstract]      
Common stock issued (in shares)   891,422  
Payment for license agreement     $ 2.1
Apexian Sublicense Agreement [Member] | Development and Regulatory Milestones [Member] | Maximum [Member]      
Sublicense Agreement [Abstract]      
Milestone payments   $ 11.0  
Apexian Sublicense Agreement [Member] | Sales Milestones [Member] | Maximum [Member]      
Sublicense Agreement [Abstract]      
Milestone payments   $ 20.0