Condensed Consolidated Statements of Stockholders' Equity - USD ($)	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock
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)	$ 5,247,000
Ending Balance (in shares) at Oct. 31, 2021	100,000
Ending Balance at Oct. 31, 2021	$ 100,235,000
Beginning balance (in shares) at Jul. 31, 2021		41,281,812
Beginning balance (in shares) at Jul. 31, 2021					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	921,000		921,000
Proceeds from issuance of employee stock purchase plan shares (in shares)		10,540
Proceeds from issuance of employee stock purchase plan shares	229,000	$ 1,000	228,000
Issuance of restricted stock (in shares)		13,428
Issuance of restricted stock, net of forfeiture	0	$ 1,000	(1,000)
Net settlement of stock-based awards (in shares)		74,461
Net settlement of stock-based awards	(2,127,000)	$ 8,000	(2,135,000)
Adjustment to reflect redemption value of convertible preferred stock (including accrued dividends)	(5,247,000)			(5,247,000)
Cash dividends declared, net	(2,629,000)			(2,629,000)
Accrual of dividend equivalents, net of reversal	(88,000)			(88,000)
Net loss	(5,984,000)			(5,984,000)
Ending balance (in shares) at Oct. 31, 2021		41,380,241
Ending balance (in shares) at Oct. 31, 2021					15,033,317
Ending balance at Oct. 31, 2021	$ 485,794,000	$ 4,138,000	604,452,000	319,053,000	$ (441,849,000)
Beginning Balance (in shares) at Jul. 31, 2022	100,000
Beginning Balance at Jul. 31, 2022	$ 105,204,000
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)	$ 1,710,000
Ending Balance (in shares) at Oct. 31, 2022	100,000
Ending Balance at Oct. 31, 2022	$ 106,914,000
Beginning balance (in shares) at Jul. 31, 2022	42,672,827	42,672,827
Beginning balance (in shares) at Jul. 31, 2022					15,033,317
Beginning balance at Jul. 31, 2022	$ 466,585,000	$ 4,267,000	625,484,000	278,683,000	$ (441,849,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Equity-classified stock award compensation	904,000		904,000
Former CEO transition costs related to equity-classified stock-based awards (See Note 1)	3,764,000		3,764,000
Proceeds from issuance of employee stock purchase plan shares (in shares)		15,017
Proceeds from issuance of employee stock purchase plan shares	119,000	$ 2,000	117,000
Issuance of restricted stock (in shares)		10,718
Issuance of restricted stock, net of forfeiture	0	$ 1,000	(1,000)
Net settlement of stock-based awards (in shares)		112,284
Net settlement of stock-based awards	(1,230,000)	$ 11,000	(1,241,000)
Adjustment to reflect redemption value of convertible preferred stock (including accrued dividends)	(1,710,000)			(1,710,000)
Cash dividends declared, net	(2,774,000)			(2,774,000)
Accrual of dividend equivalents, net of reversal	(201,000)			(201,000)
Net loss	$ (11,096,000)			(11,096,000)
Ending balance (in shares) at Oct. 31, 2022	42,810,846	42,810,846
Ending balance (in shares) at Oct. 31, 2022					15,033,317
Ending balance at Oct. 31, 2022	$ 454,361,000	$ 4,281,000	$ 629,027,000	$ 262,902,000	$ (441,849,000)