Quarterly report pursuant to Section 13 or 15(d)

Acquisition of Patents and Intangibles - Amortization Expense (Detail)

v3.21.2
Acquisition of Patents and Intangibles - Amortization Expense (Detail) - USD ($)
$ in Thousands
3 Months Ended
Aug. 31, 2021
Feb. 28, 2021
Aug. 31, 2020
May 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]        
Amortization expense $ 300   $ 500  
Intangible asset impairment charge   $ 10,000    
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]        
2022 (9 months remaining) 604      
2023 384      
2024 85      
2025 85      
Thereafter 232      
Total amortizable intangible assets, net $ 1,390     $ 1,653