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Debt Securities (Tables)

12 Months Ended

Jul. 31, 2020

Investments, Debt and Equity Securities [Abstract]

Schedule of available-for-sale securities

(in thousands)		Amortized Cost				Gross Unrealized Gains				Gross Unrealized Losses				Fair Value
July 31, 2020
Certificates of deposit*		$	13,844			$	58			$	—			$	13,902
U.S. Treasury bills			2,498				—				—				2,498
Municipal bonds			1,979				—				(16	)			1,963
TOTAL		$	18,321			$	58			$	(16	)		$	18,363
July 31, 2019
Certificates of deposit*		$	2,234			$	—			$	—			$	2,234
Municipal bonds			300				—				—				300
TOTAL		$	2,534			$	—			$	—			$	2,534

Schedule of contractual maturities of available-for-sale debt securities

(in thousands)		Fair Value
Within one year		$	15,941
After one year through five years			1,449
After five years through ten years			209
After ten years			764
TOTAL		$	18,363

Schedule of available-for-sale securities, unrealized loss position

(in thousands)		Unrealized Losses				Fair Value
July 31, 2020
Municipal bonds		$	16			$	1,963
July 31, 2019
Total		$	—			$	—

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Tabular disclosure of fair value of investments in debt and equity securities in an unrealized loss position categorized neither as held-to-maturity nor trading securities.

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Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.

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Tabular disclosure of marketable securities. This may consist of investments in certain debt and equity securities, short-term investments and other assets.

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