Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)	3 Months Ended
	Oct. 31, 2024	Jul. 31, 2024
Equity, Attributable to Parent [Abstract]
Convertible preferred stock, par value per share (in dollars per share)	$ 0.10	$ 0.10
Convertible preferred stock, shares authorized (in shares)	175,264	171,827
Convertible preferred stock converted to other securities	$ 187,814,000
Convertible preferred stock, par value (in shares)	175,264	171,827
Convertible preferred stock, accrued dividends	$ 655,000	$ 1,341,000
Preferred stock, par value (in dollars per share)	$ 0.10	$ 0.10
Preferred stock, shares authorized (in shares)	1,824,736	1,828,173
Common stock, par value (in dollars per share)	$ 0.10	$ 0.10
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	43,927,127	43,766,109
Treasury stock, shares (in shares)	15,033,317	15,033,317