XML 42 R31.htm IDEA: XBRL DOCUMENT

Debt Securities (Tables)

9 Months Ended

Apr. 30, 2021

Investments, Debt and Equity Securities [Abstract]

Schedule of Available-for-sale Securities

The following is a summary of available-for-sale debt securities:

		Amortized Cost				Gross Unrealized Gains				Gross Unrealized Losses				Fair Value
		(in thousands)
April 30, 2021:
Certificates of deposit*		$	1,927			$	—			$	—			$	1,927
U.S. Treasury bills and notes			1,672				—				(28	)			1,644
Corporate bonds			6,283				21				(112	)			6,192
Municipal bonds			7,091				—				(2	)			7,089
Total		$	16,973			$	21			$	(142	)		$	16,852

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

*

Each of the Company’s certificates of deposit has a CUSIP, was purchased in the secondary market through a broker and may be sold in the secondary market.

Schedule of Contractual Maturities of Available-for-sale Debt Securities

The contractual maturities of the Company’s available-for-sale debt securities at April 30, 2021 were as follows:

		Fair Value
		(in thousands)
Within one year		$	5,048
After one year through five years			5,986
After five years through ten years			5,399
After ten years			419
Total		$	16,852

Schedule of Available-for-sale Securities, Unrealized Loss Position

The following available-for-sale debt securities were in an unrealized loss position for which other-than-temporary impairments were not recognized:

		Unrealized Losses				Fair Value
		(in thousands)
April 30, 2021:
U.S. Treasury bills and notes		$	28			$	1,644
Corporate bonds			112				5,535
Municipal bonds			2				5,399
Total		$	142			$	12,578
July 31, 2020:
Municipal bonds		$	16			$	1,963