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Condensed Consolidated Statements of Stockholders' Equity - USD ($)
Total
Cumulative Effect, Period of Adoption, Adjustment
Common Stock
Additional Paid-in Capital
Retained Earnings
Retained Earnings
Cumulative Effect, Period of Adoption, Adjustment
Treasury Stock
Increase (Decrease) in Temporary Equity [Roll Forward]              
Convertible preferred stock issuance costs $ 0            
Establishment of initial convertible preferred stock purchase option liability 0            
Beginning balance (in shares) at Jul. 31, 2020     39,924,439        
Beginning balance (in shares) at Jul. 31, 2020             15,033,317
Beginning balance at Jul. 31, 2020 549,299,000 $ (215,000) $ 3,992,000 $ 569,891,000 $ 417,265,000 $ (215,000) $ (441,849,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Equity-classified stock award compensation 1,986,000     1,986,000      
Proceeds from issuance of employee stock purchase plan shares (in shares)     31,122        
Proceeds from issuance of employee stock purchase plan shares 369,000   $ 3,000 366,000      
Issuance of restricted stock (in shares)     35,975        
Issuance of restricted stock 0   $ 4,000 (4,000)      
Net settlement of stock-based awards (in shares)     68,441        
Net settlement of stock-based awards (1,341,000)   $ 7,000 (1,348,000)      
Cash dividends declared, net (4,988,000)       (4,988,000)    
Accrual of dividend equivalents, net of reversal (191,000)       (191,000)    
Net loss (81,635,000)       (81,635,000)    
Ending balance (in shares) at Jan. 31, 2021     40,059,977        
Ending balance (in shares) at Jan. 31, 2021             15,033,317
Ending balance at Jan. 31, 2021 463,284,000   $ 4,006,000 570,891,000 330,236,000   $ (441,849,000)
Increase (Decrease) in Temporary Equity [Roll Forward]              
Convertible preferred stock issuance costs 0            
Establishment of initial convertible preferred stock purchase option liability 0            
Beginning balance (in shares) at Oct. 31, 2020     40,043,753        
Beginning balance (in shares) at Oct. 31, 2020             15,033,317
Beginning balance at Oct. 31, 2020 460,152,000   $ 4,004,000 569,422,000 328,575,000   $ (441,849,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Equity-classified stock award compensation 1,287,000     1,287,000      
Proceeds from issuance of employee stock purchase plan shares (in shares)     15,857        
Proceeds from issuance of employee stock purchase plan shares 187,000   $ 2,000 185,000      
Net settlement of stock-based awards (in shares)     367        
Net settlement of stock-based awards (3,000)   $ 0 (3,000)      
Cash dividends declared, net (2,495,000)       (2,495,000)    
Accrual of dividend equivalents, net of reversal (49,000)       (49,000)    
Net loss 4,205,000       4,205,000    
Ending balance (in shares) at Jan. 31, 2021     40,059,977        
Ending balance (in shares) at Jan. 31, 2021             15,033,317
Ending balance at Jan. 31, 2021 $ 463,284,000   $ 4,006,000 570,891,000 330,236,000   $ (441,849,000)
Increase (Decrease) in Temporary Equity [Roll Forward]              
Issuance of convertible preferred stock (in shares) 100,000            
Issuance of convertible preferred stock $ 100,000,000            
Convertible preferred stock issuance costs (4,007,000)            
Establishment of initial convertible preferred stock purchase option liability (1,005,000)            
Adjustment to reflect redemption value of convertible preferred stock (including accrued dividends) $ 6,879,000            
Ending Balance (in shares) at Jan. 31, 2022 100,000            
Ending Balance at Jan. 31, 2022 $ 101,867,000            
Beginning balance (in shares) at Jul. 31, 2021 41,281,812   41,281,812        
Beginning balance (in shares) at Jul. 31, 2021 15,033,317           15,033,317
Beginning balance at Jul. 31, 2021 $ 500,719,000   $ 4,128,000 605,439,000 333,001,000   $ (441,849,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Equity-classified stock award compensation 2,904,000     2,904,000      
CEO transition costs related to equity-classified stock-based awards (See Note 1) 7,388,000     7,388,000      
Proceeds from issuance of employee stock purchase plan shares (in shares)     21,676        
Proceeds from issuance of employee stock purchase plan shares 454,000   $ 2,000 452,000      
Issuance of restricted stock (in shares)     132,854        
Issuance of restricted stock 0   $ 13,000 (13,000)      
Net settlement of stock-based awards (in shares)     116,902        
Net settlement of stock-based awards (3,378,000)   $ 12,000 (3,390,000)      
Adjustment to reflect redemption value of convertible preferred stock (including accrued dividends) (6,879,000)       (6,879,000)    
Cash dividends declared, net (5,269,000)       (5,269,000)    
Accrual of dividend equivalents, net of reversal (217,000)       (217,000)    
Net loss $ (27,858,000)       (27,858,000)    
Ending balance (in shares) at Jan. 31, 2022 41,553,244   41,553,244        
Ending balance (in shares) at Jan. 31, 2022 15,033,317           15,033,317
Ending balance at Jan. 31, 2022 $ 467,864,000   $ 4,155,000 612,780,000 292,778,000   $ (441,849,000)
Beginning Balance (in shares) at Oct. 31, 2021 100,000            
Beginning Balance at Oct. 31, 2021 $ 100,235,000            
Increase (Decrease) in Temporary Equity [Roll Forward]              
Convertible preferred stock issuance costs 0            
Establishment of initial convertible preferred stock purchase option liability 0            
Adjustment to reflect redemption value of convertible preferred stock (including accrued dividends) $ 1,632,000            
Ending Balance (in shares) at Jan. 31, 2022 100,000            
Ending Balance at Jan. 31, 2022 $ 101,867,000            
Beginning balance (in shares) at Oct. 31, 2021     41,380,241        
Beginning balance (in shares) at Oct. 31, 2021             15,033,317
Beginning balance at Oct. 31, 2021 485,794,000   $ 4,138,000 604,452,000 319,053,000   $ (441,849,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Equity-classified stock award compensation 1,983,000     1,983,000      
CEO transition costs related to equity-classified stock-based awards (See Note 1) 7,388,000     7,388,000      
Proceeds from issuance of employee stock purchase plan shares (in shares)     11,136        
Proceeds from issuance of employee stock purchase plan shares 225,000   $ 1,000 224,000      
Issuance of restricted stock (in shares)     119,426        
Issuance of restricted stock 0   $ 12,000 (12,000)      
Net settlement of stock-based awards (in shares)     42,441        
Net settlement of stock-based awards (1,251,000)   $ 4,000 (1,255,000)      
Adjustment to reflect redemption value of convertible preferred stock (including accrued dividends) (1,632,000)       (1,632,000)    
Cash dividends declared, net (2,640,000)       (2,640,000)    
Accrual of dividend equivalents, net of reversal (129,000)       (129,000)    
Net loss $ (21,874,000)       (21,874,000)    
Ending balance (in shares) at Jan. 31, 2022 41,553,244   41,553,244        
Ending balance (in shares) at Jan. 31, 2022 15,033,317           15,033,317
Ending balance at Jan. 31, 2022 $ 467,864,000   $ 4,155,000 $ 612,780,000 $ 292,778,000   $ (441,849,000)