Marketable Securities (Tables)

6 Months Ended

Jan. 31, 2016

Marketable Securities [Abstract]

Summary of marketable securities

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
	(in thousands)
Available-for-sale securities:
January 31, 2016:
Certificates of deposit*	$	21,831	$	—	$	(7	)	$	21,824
Federal Government Sponsored Enterprise notes		5,813		10		—			5,823
Mutual funds		5,063		—		(231	)		4,832
Corporate bonds		2,467		6		(11	)		2,462
U.S. Treasury notes		2,785		32		—			2,817
Municipal bonds		9,028		12		(1	)		9,039
Total	$	46,987	$	60	$	(250	)	$	46,797
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	$	19,311
After one year through five years		20,564
After five years through ten years		1,799
After ten years		291
Total	$	41,965

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

	Unrealized Losses		Fair Value
	(in thousands)
January 31, 2016:
Certificates of deposit	$	7	$	11,217
Mutual funds		231		4,832
Corporate bonds		11		1,083
Municipal bonds		1		1,550
Total	$	250	$	18,682
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