Marketable Securities (Tables)

9 Months Ended

Apr. 30, 2016

Marketable Securities [Abstract]

Summary of marketable securities

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	(in thousands)
Available-for-sale securities:
April 30, 2016:
Certificates of deposit*	$	18,309	$	5	$	(1	)	$	18,313
Federal Government Sponsored Enterprise notes		5,821		10		(3	)		5,828
Mutual funds		5,092		—		(102	)		4,990
Corporate bonds		2,570		24		—			2,594
Equity		2,463		—		(109	)		2,354
U.S. Treasury notes		2,686		43		—			2,729
Municipal bonds		9,822		9		(2	)		9,829
Total	$	46,763	$	91	$	(217	)	$	46,637
July 31, 2015:
Certificates of deposit*	$	22,736	$	3	$	(2	)	$	22,737
Federal Home Loan Bank bonds		795		—		—			795
International agency notes		1,120		—		(1	)		1,119
Mutual funds		5,000		—		(18	)		4,982
Straight Path Communications Inc. common stock		2,086		—		(563	)		1,523
Municipal bonds		9,125		9		(3	)		9,131
Total	$	40,862	$	12	$	(587	)	$	40,287

* 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 securities

	Fair Value
	(in thousands)
Within one year	$	19,174
After one year through five years		18,301
After five years through ten years		1,556
After ten years		262
Total	$	39,293

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

	Unrealized Losses		Fair Value
	(in thousands)
April 30, 2016:
Certificates of deposit	$	1	$	3,586
Federal Government Sponsored Enterprise notes		3		1,852
Mutual funds		102		4,990
Equity		109		2,354
Municipal bonds		2		4,957
Total	$	217	$	17,739
July 31, 2015:
Certificates of deposit	$	2	$	2,194
International agency notes		1		1,119
Mutual funds		18		4,982
Straight Path Communications Inc. common stock		563		1,523
Municipal bonds		3		3,466
Total	$	587	$	13,284