Consolidated Statements of Stockholders' Equity - USD ($)	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Additional Paid-in Capital	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Treasury Stock
Increase (Decrease) in Temporary Equity [Roll Forward]
Convertible preferred stock issuance costs	$ 0
Establishment of initial convertible preferred stock purchase option liability	0
Beginning balance (in shares) at Jul. 31, 2020			39,924,439
Beginning balance (in shares) at Jul. 31, 2020							15,033,317
Beginning balance at Jul. 31, 2020	549,299,000	$ (215,000)	$ 3,992,000	$ 569,891,000	$ 417,265,000	$ (215,000)	$ (441,849,000)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Equity-classified stock award compensation	9,983,000			9,983,000
Proceeds from issuance of employee stock purchase plan shares (in shares)			54,762
Issuance of employee stock purchase plan shares	809,000		$ 5,000	804,000
Issuance of restricted stock (in shares)			35,495
Issuance of restricted stock	0		$ 4,000	(4,000)
Net settlement of stock-based awards (in shares)			240,549
Net settlement of stock-based awards	(4,000,000)		$ 24,000	(4,024,000)
Common stock issued for acquisitions (in shares)			1,026,567
Common stock issued for acquisitions	28,892,000		$ 103,000	28,789,000
Cash dividends declared, net	(10,189,000)				(10,189,000)
Accrual of dividend equivalents, net of reversal	(380,000)				(380,000)
Net loss	(73,480,000)				(73,480,000)
Ending balance (in shares) at Jul. 31, 2021			41,281,812
Ending balance (in shares) at Jul. 31, 2021							15,033,317
Ending balance at Jul. 31, 2021	$ 500,719,000		$ 4,128,000	605,439,000	333,001,000		$ (441,849,000)
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)	$ 10,216,000
Ending balance (in shares) at Jul. 31, 2022	100,000
Ending balance at Jul. 31, 2022	$ 105,204,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Equity-classified stock award compensation	7,767,000			7,767,000
CEO transition costs related to equity-classified stock-based awards (See Note 11)	7,388,000			7,388,000
Proceeds from issuance of employee stock purchase plan shares (in shares)			49,138
Issuance of employee stock purchase plan shares	730,000		$ 5,000	725,000
Issuance of restricted stock, net of forfeiture (in shares)			132,854
Issuance of restricted stock, net of forfeiture	0		$ 13,000	(13,000)
Net settlement of stock-based awards (in shares)			247,721
Net settlement of stock-based awards	(4,615,000)		$ 25,000	(4,640,000)
Common stock issued for acquisitions (in shares)			961,302
Common stock issued for acquisitions	8,914,000		$ 96,000	8,818,000
Adjustment to reflect redemption value of convertible preferred stock (including accrued dividends)	(10,216,000)				(10,216,000)
Cash dividends declared, net	(10,661,000)				(10,661,000)
Accrual of dividend equivalents, net of reversal	(389,000)				(389,000)
Net loss	$ (33,052,000)
Ending balance (in shares) at Jul. 31, 2022	42,672,827		42,672,827
Ending balance (in shares) at Jul. 31, 2022	15,033,317						15,033,317
Ending balance at Jul. 31, 2022	$ 466,585,000		$ 4,267,000	625,484,000	278,683,000		$ (441,849,000)
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)	$ 7,007,000
Ending balance (in shares) at Jul. 31, 2023	100,000
Ending balance at Jul. 31, 2023	$ 112,211,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Equity-classified stock award compensation	10,257,000			10,257,000
CEO transition costs related to equity-classified stock-based awards (See Note 11)	3,764,000			3,764,000
Proceeds from issuance of employee stock purchase plan shares (in shares)			54,617
Issuance of employee stock purchase plan shares	434,000		$ 5,000	429,000
Issuance of restricted stock, net of forfeiture (in shares)			93,091
Issuance of restricted stock, net of forfeiture	0		$ 9,000	(9,000)
Net settlement of stock-based awards (in shares)			275,736
Net settlement of stock-based awards	(2,971,000)		$ 29,000	(3,000,000)
Adjustment to reflect redemption value of convertible preferred stock (including accrued dividends)	(7,007,000)				(7,007,000)
Cash dividends declared, net	(5,549,000)				(5,549,000)
Accrual of dividend equivalents, net of reversal	(315,000)				(315,000)
Net loss	$ (26,899,000)
Ending balance (in shares) at Jul. 31, 2023	43,096,271		43,096,271
Ending balance (in shares) at Jul. 31, 2023	15,033,317						15,033,317
Ending balance at Jul. 31, 2023	$ 438,299,000		$ 4,310,000	$ 636,925,000	$ 238,913,000		$ (441,849,000)