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Earnings Per Share (Tables)
 6 Months Ended
Jan. 31, 2022
Earnings Per Share [Abstract]  
Schedule of numerators and denominators used in basic and diluted EPS calculations
The following table reconciles the numerators and denominators used in the basic and diluted EPS calculations:
 Three months ended January 31,Six months ended January 31,
2022202120222021
Numerator:  
Net (loss) income$(21,874,000)4,205,000 $(27,858,000)(81,635,000)
Convertible preferred stock issuance costs— — (4,007,000)— 
Establishment of initial convertible preferred stock purchase option liability— — (1,005,000)— 
Dividend on convertible preferred stock(1,632,000)— (1,867,000)— 
Net loss attributable to common stockholders$(23,506,000)4,205,000 $(34,737,000)(81,635,000)
Denominator:  
Denominator for basic calculation26,472,000 25,337,000 26,449,000 25,321,000 
Effect of dilutive securities:
Stock-based awards— 83,000 — — 
Denominator for diluted calculation26,472,000 25,420,000 26,449,000 25,321,000