Quarterly report pursuant to Section 13 or 15(d)

Licenses Acquired - Additional Information (Detail)

v3.20.2
Licenses Acquired - Additional Information (Detail) - Licensing Agreements [Member] - Columbia License [Member] - USD ($)
 3 Months Ended 6 Months Ended
May 06, 2020
Jun. 30, 2020
Jun. 30, 2020
Research and Development Arrangement, Contract to Perform for Others [Line Items]      
Payment of Upfront Fees $ 300,000    
Stock Issued During Period, Shares, Issued for Services 1,000,000    
Percentage of common shares issued (in percent) 10.00%    
Valuation Technique, Discounted Cash Flow [Member]      
Research and Development Arrangement, Contract to Perform for Others [Line Items]      
Percentage of lack of marketability   41.70% 41.70%
Percentage of weighted average cost of capital   20.50% 20.50%
Net of debt in per share   $ 0.021 $ 0.021
Amount of net of debt utilized   $ 21,000 $ 21,000
Development Milestone [Member]      
Research and Development Arrangement, Contract to Perform for Others [Line Items]      
Revenue Recognition Milestone Method Payments Due     18,000,000.0
Product milestone      
Research and Development Arrangement, Contract to Perform for Others [Line Items]      
Revenue Recognition Milestone Method Payments Due     15,300,000
Sale Milestone [Member]      
Research and Development Arrangement, Contract to Perform for Others [Line Items]      
Revenue Recognition Milestone Method Payments Due     $ 15,000,000