Convertible Preferred Stock (Details) - USD ($)			3 Months Ended	6 Months Ended
	Oct. 19, 2021	Oct. 18, 2021	Jan. 31, 2023	Jan. 31, 2023	Jan. 31, 2022	Jul. 31, 2022
Class of Stock [Line Items]
Series A convertible preferred stock, shares authorized (in shares)			125,000	125,000		125,000
Series A convertible preferred stock, par value per share (in dollars per share)			$ 0.10	$ 0.10		$ 0.10
Convertible preferred stock, aggregate purchase price					$ 100,000,000
Issuance of convertible preferred stock	100,000				100,000
Optional repurchase trigger, percent		19.99%
Current redemption value			$ 108,651,000	$ 108,651,000		$ 105,204,000
Convertible preferred stock, accrued dividends			585,000	585,000		$ 566,000
Green Shoe
Class of Stock [Line Items]
Long-term debt		$ 1,005,000
Convertible Preferred Stock
Class of Stock [Line Items]
Series A convertible preferred stock, shares authorized (in shares)		125,000
Series A convertible preferred stock, par value per share (in dollars per share)		$ 0.10
Convertible preferred stock, aggregate purchase price	$ 25,000,000	$ 125,000,000
Convertible preferred stock, aggregate purchase price, price per share (in dollars per share)		$ 1,000
Liquidation preference per share (in dollars per share)	$ 23.97	$ 1,000
Dividend rate, percent	6.50%
Dividend rate, per-dollar-amount, maximum (in dollars per share)	$ 0.10
Proceeds from initial issuance, net of issuance costs				4,007,000
Carrying amount, attributable to parent			100,000,000	100,000,000
Current redemption value			108,651,000	108,651,000
Dividend paid-in-kind				8,066,000
Convertible preferred stock, accrued dividends			585,000	585,000
Carrying value adjustment in the period			1,737,000
Convertible Preferred Stock | Green Shoe
Class of Stock [Line Items]
Liquidation preference per share (in dollars per share)	$ 31.21
IPO | Convertible Preferred Stock
Class of Stock [Line Items]
Convertible preferred stock, aggregate purchase price	$ 100,000,000
Green Shoe Option | Convertible Preferred Stock
Class of Stock [Line Items]
Carrying amount, attributable to parent			$ 25,000,000	$ 25,000,000