Marketable Securities (Tables)

6 Months Ended

Jan. 31, 2014

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, 2014:
Certificates of deposit*	$	7,053	$	—	$	—	$	7,053
Municipal bonds		4,139		—		—		4,139
Total	$	11,192	$	—	$	—	$	11,192
July 31, 2013:
Certificates of deposit*	$	8,786	$	—	$	—	$	8,786
Municipal bonds		898		—		—		898
Total	$	9,684	$	—	$	—	$	9,684

* 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	$	10,943
After one year through five years		249
After five years through ten years		—
After ten years		—
Total	$	11,192