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Consolidated Statements of Stockholders' Equity - USD ($)
$ in Thousands
Total
Restricted stock units
Performance share units
Common Stock
Common Stock
Restricted stock units
Common Stock
Performance share units
Additional paid in capital
Additional paid in capital
Restricted stock units
Additional paid in capital
Performance share units
Accumulated deficit
Accumulated other comprehensive income
Treasury Stock
Beginning Balance (in shares) at May. 31, 2022       39,541,173,000                
Beginning Balance at May. 31, 2022 $ 424,489     $ 380     $ 586,879     $ (158,413) $ 1,357 $ (5,714)
Beginning Balance, Treasury (in shares) at May. 31, 2022                       (370,000,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                        
Net income (loss) (13,004)                 (13,004)    
Exercise of stock option (in shares)       6,617,000                
Exercise of stock options (29)         (29)          
Issuance/Cancellation of performance share units and restricted stock units, net (in shares)         213,241,000 29,826,000            
Issuance/Cancellation of performance share units and restricted stock units   $ (648) $ (312)         $ (648) $ (312)      
Purchase of common stock under ESPP (in shares)       56,894,000                
Purchases of common stock under ESPP 1,071     $ 1     1,070          
Stock-based compensation 3,024           3,024          
Other comprehensive loss, net of tax (550)                   (550)  
Ending Balance (in shares) at Aug. 31, 2022       39,847,751,000                
Ending Balance at Aug. 31, 2022 414,041     $ 381     589,984     (171,417) 807 $ (5,714)
Ending Balance, Treasury (in shares) at Aug. 31, 2022                       (370,000,000)
Beginning Balance (in shares) at May. 31, 2023       39,981,422                
Beginning Balance at May. 31, 2023 $ 378,296     $ 382     599,206     (210,855) (4,723) $ (5,714)
Beginning Balance, Treasury (in shares) at May. 31, 2023 (370,000)                     (370,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]                        
Net income (loss) $ 45,884                 45,884    
Issuance/Cancellation of performance share units and restricted stock units, net (in shares)         386,031 87,377            
Issuance/Cancellation of performance share units and restricted stock units   $ (280) $ (210)         $ (280) $ (210)      
Purchase of common stock under ESPP (in shares)       131,811                
Purchases of common stock under ESPP 900     $ 1     899          
Stock-based compensation 4,144           4,144          
Other comprehensive loss, net of tax (930)                   (930)  
Ending Balance (in shares) at Aug. 31, 2023       40,586,641                
Ending Balance at Aug. 31, 2023 $ 427,804     $ 383     $ 603,759     $ (164,971) $ (5,653) $ (5,714)
Ending Balance, Treasury (in shares) at Aug. 31, 2023 (370,000)                     (370,000)