Marketable Securities (Tables)

12 Months Ended

Jul. 31, 2017

Marketable Securities [Abstract]

Summary of marketable securities

(in thousands)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
July 31, 2017
Available-for-sale securities:
Certificates of deposit*	$	29,011	$	1	$	(7	)	$	29,005
Federal Government Sponsored Enterprise notes		3,992		—		(14	)		3,978
International agency notes		291		—		—			291
Mutual funds		5,353		77		—			5,430
Corporate bonds		4,643		—		—			4,643
Equity		74		—		(26	)		48
U.S. Treasury notes		6,673		—		—			6,673
Municipal bonds		8,201		4		(1	)		8,204
TOTAL	$	58,238	$	82	$	(48	)	$	58,272
July 31, 2016
Available-for-sale securities:
Certificates of deposit*	$	17,690	$	6	$	—		$	17,696
Federal Government Sponsored Enterprise notes		3,457		17		—			3,474
International agency notes		409		5		—			414
Mutual funds		5,121		—		(39	)		5,082
Corporate bonds		3,633		40		—			3,673
Equity		2,463		—		(140	)		2,323
U.S. Treasury notes		4,946		95		(1	)		5,040
Municipal bonds		15,222		26		(1	)		15,247
TOTAL	$	52,941	$	189	$	(181	)	$	52,949

*         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.

Summary of available-for-sale debt securities

(in thousands)	Fair Value
Within one year	$	34,921
After one year through five years		17,873
After five years through ten years		—
After ten years		—
TOTAL	$	52,794

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

(in thousands)	Unrealized Losses		Fair  Value
July 31, 2017
Certificates of deposit	$	7	$	12,155
Federal Government Sponsored Enterprise notes		14		3,529
Equity		26		48
Municipal bonds		1		3,349
TOTAL	$	48	$	19,081
July 31, 2016
Mutual funds	$	39	$	5,082
Equity		140		2,323
U.S. Treasury notes		1		199
Municipal bonds		1		3,112
TOTAL	$	181	$	10,716