Investment (Tables)

12 Months Ended

Jul. 31, 2023

Investment [Abstract]

Schedule of Available-for-Sale Securities

The amortized cost, gross unrealized holding gains, gross unrealized holding losses, and fair value for available-for-sale securities as of July 31, 2023 and 2022 are as follows:

July 31, 2023	Amortized cost		Gross unrealized gains		Gross unrealized (losses)			Fair value
	(in thousands)
Available-for-sale securities:
U.S. Treasury Bills	$	11,222	$	53	$	—		$	11,275
Corporate bonds		46,766		4,333		(4,660	)		46,439
Convertible note receivable, related party		2,000		—		(79	)		1,921
Total available-for-sale securities	$	59,988	$	4,386	$	(4,739	)	$	59,635

July 31, 2022	Amortized cost		Gross unrealized gains		Gross unrealized (losses)			Fair value
	(in thousands)
Available-for-sale securities:
Corporate bonds	$	36,761	$	81	$	(144	)	$	36,698
Total available-for-sale securities	$	36,761	$	81	$	(144	)	$	36,698