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Marketable Securities (Tables)

6 Months Ended

Jan. 31, 2017

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, 2017:
Certificates of deposit*		$	19,335			$	2			$	(1	)		$	19,336
Federal Government Sponsored Enterprise notes			6,331				—				(23	)			6,308
International agency notes			653				—				(10	)			643
Mutual funds			5,223				15				(1	)			5,237
Corporate bonds			3,290				6				(13	)			3,283
Equity			379				42				—				421
U.S. Treasury notes			5,035				2				(68	)			4,969
Municipal bonds			13,082				3				(9	)			13,076
Total		$	53,328			$	70			$	(125	)		$	53,273
July 31, 2016:
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 securities

		Fair Value
		(in thousands)
Within one year		$	26,264
After one year through five years			18,266
After five years through ten years			2,369
After ten years			716
Total		$	47,615

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

		Unrealized Losses				Fair Value
		(in thousands)
January 31, 2017:
Certificates of deposit		$	1			$	3,164
Federal Government Sponsored Enterprise notes			23				6,265
International agency notes			10				643
Mutual funds			1				2,600
Corporate bonds			13				2,239
U.S. Treasury notes			68				4,408
Municipal bonds			9				9,878
Total		$	125			$	29,197
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

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Tabular disclosure of fair value of investments in debt and equity securities in an unrealized loss position categorized neither as held-to-maturity nor trading securities.

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Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.

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