Earnings Per Share (Details) - USD ($)	3 Months Ended
	Oct. 31, 2021	Oct. 31, 2020
Earnings Per Share [Abstract]
Reduction in weighted average shares as a result of the repurchase of common shares (in shares)	0	0
Weighted average performance shares outstanding during the period that are excluded from EPS calculation	239,000	232,000
Numerator:
Net loss	$ (5,984,000)	$ (85,840,000)
Dividend on convertible preferred stock	(235,000)	0
Convertible preferred stock issuance costs	(5,247,000)
Numerator for diluted calculation	$ (11,231,000)	$ (85,840,000)
Denominator:
Denominator for basic calculation (in shares)	26,426,000	25,305,000
Stock-based Awards
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive equity-classified stock-based awards not included in calculation of diluted earnings per share (in shares)	1,525,000	1,839,000
Common Shares Related to Business Acquisition
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive equity-classified stock-based awards not included in calculation of diluted earnings per share (in shares)	340,000
Common Shares Related to Conversion of Convertible Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive equity-classified stock-based awards not included in calculation of diluted earnings per share (in shares)	577,000