Annual report pursuant to Section 13 and 15(d)

Subsequent Event (Details)

v3.19.3.a.u2
Subsequent Event (Details) - USD ($)
12 Months Ended
Feb. 08, 2020
Dec. 31, 2019
Subsequent Event [Line Items]    
Upfront payment   $ 3,000,000
Subsequent Event [Member]    
Subsequent Event [Line Items]    
Upfront payment $ 250,000  
RX-0201 And RX-0301 [Member] | Subsequent Event [Member]    
Subsequent Event [Line Items]    
Milestone payment 63,000,000  
RX-0047 [Member] | Subsequent Event [Member]    
Subsequent Event [Line Items]    
Milestone payment $ 33,000,000