CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2024	Jan. 31, 2023	Jan. 31, 2024	Jan. 31, 2023
Income Statement [Abstract]
Net revenue	$ 43,045	$ 50,781	$ 84,386	$ 102,140
Cost of revenue	31,698	37,719	61,564	74,813
Gross profit	11,347	13,062	22,822	27,327
Operating expenses:
Selling, general and administrative	8,732	10,459	17,527	20,845
Amortization	893	0	1,768	0
Total operating expenses	9,625	10,459	19,295	20,845
Operating income	1,722	2,603	3,527	6,482
Other income (expense):
Interest income	3,499	332	6,718	476
Interest expense	(249)	(848)	(496)	(1,674)
Other gains (losses), net	568	(2,959)	898	(74)
Total other income (expense), net	3,818	(3,475)	7,120	(1,272)
Income (loss) before income taxes	5,540	(872)	10,647	5,210
Income tax expense (benefit)	194	(346)	865	779
Net income (loss)	5,346	(526)	9,782	4,431
Less: Preferred dividends on Series C redeemable preferred stock	(537)	(537)	(1,073)	(1,074)
Net income (loss) available to common stockholders	$ 4,809	$ (1,063)	$ 8,709	$ 3,357
Net income (loss) per common shares - basic (in usd per share)	$ 0.18	$ (0.16)	$ 0.33	$ 0.52
Net income (loss) per common shares - diluted (in usd per share)	$ 0.18	$ (0.16)	$ 0.33	$ 0.52
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Weighted-average number of common shares outstanding - basic (in shares)	6,211	6,448	6,205	6,442
Weighted-average number of common shares outstanding - basic (in shares)	26,083	6,448	26,075	6,496