Marketable Securities (Tables)

3 Months Ended

Oct. 31, 2015

Marketable Securities [Abstract]

Summary of marketable securities

		Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
		(in thousands)
Available-for-sale securities:
October 31, 2015:
Certificates of deposit*	$	24,400	$	6	$	–		$	24,406
Federal Home Loan Bank bonds		795		–		–			795
Federal Home Loan Mortgage Corp. bonds		2,203		3		(2	)		2,204
Mutual funds		5,025		–		(82	)		4,943
Corporate bonds		3,090		6		(2	)		3,094
U.S. Treasury notes		2,644		11		–			2,655
Municipal bonds		9,212		13		–			9,225
Total	$	47,369	$	39	$	(86	)	$	47,322
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	$	21,613
After one year through five years		18,541
After five years through ten years		1,824
After ten years		401
Total	$	42,379

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

		Unrealized Losses		Fair Value
		(in thousands)
October 31, 2015:
Federal Home Loan Mortgage Corp. bonds	$	2	$	1,698
Mutual funds		82		4,943
Corporate bonds		2		886
Total	$	86	$	7,527
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