Annual report pursuant to Section 13 and 15(d)

Acquisition of Patents and Intangibles (Details)

v3.21.2
Acquisition of Patents and Intangibles (Details)
$ / shares in Units, $ in Thousands, shares in Millions
3 Months Ended 12 Months Ended
Mar. 19, 2021
shares
Feb. 28, 2021
USD ($)
May 31, 2021
USD ($)
item
$ / shares
shares
May 31, 2020
USD ($)
Asset Acquisition [Line Items]        
Shares subject to arbitration | shares 3.1      
Impairment of Intangible Assets (Excluding Goodwill), Net   $ 10,000 $ 10,049  
Impairment charge, gross   12,200    
Impairment charge, reversal of accumulated amortization   $ 2,200    
Shares restricted from transfer | shares     8.3  
Stock repurchase price, per share | $ / shares     $ 0.001  
Restricted shares, number of installments | item     3  
Acquired intangible assets     $ 1,653 $ 13,456
Patents        
Asset Acquisition [Line Items]        
Acquired intangible assets     $ 4,600 $ 4,600
Estimated useful life of acquired intangibles     10 years