Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies - Narrative (Details)

v3.20.4
Commitments and Contingencies - Narrative (Details) - USD ($)
1 Months Ended 12 Months Ended
Sep. 15, 2020
Feb. 19, 2019
Feb. 01, 2016
Jun. 30, 2019
Dec. 31, 2020
Dec. 31, 2019
Nov. 20, 2019
Payments for milestones       $ 250,000      
Percentage of license income entitlement         50.00%    
License income         $ 37,500 $ 200,000  
Issuance of common stock (in shares)   2,172,591          
Operating lease term (in years)             36 months
Penalty termination fee payment             $ 400,000
Purchase obligation         2,600,000    
Purchase obligation due in 2021         1,000,000.0    
Purchase obligation due in 2022         1,600,000    
Term of extension 12 months            
Rent expense         100,000 100,000  
Lease payments due         100,000    
Postemployment benefits liability         2,900,000    
Office Space Lease Arrangement              
Operating lease term (in years)     63 months        
Monthly lease payment     $ 7,900        
Office Space Lease Arrangement | Maximum              
Monthly lease payment     $ 8,900        
MD Anderson              
Payment for expenses related to agreement         $ 100,000 $ 300,000  
Issuance of common stock (in shares)         175,000