Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets Activity (Detail)

v3.20.2
Intangible Assets Activity (Detail) - USD ($)
Aug. 31, 2020
May 31, 2020
Aug. 31, 2019
Acquired Finite-Lived Intangible Assets [Line Items]      
Leronlimab (PRO 140) patent $ 3,500,000 $ 3,500,000 $ 3,500,000
Website development costs 20,000 20,000  
Accumulated amortization (5,687,000) (5,190,000)  
Total amortizable intangible assets, net 12,959,000 13,456,000  
Patents currently not amortized 0 0  
Carrying value of intangibles, net 12,959,000 13,456,000  
ProstaGene, LLC      
Acquired Finite-Lived Intangible Assets [Line Items]      
ProstaGene, LLC intangible asset acquisition $ 15,126,000 $ 15,126,000