Marketable Securities (Tables)

3 Months Ended

Oct. 31, 2013

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, 2013:
Certificates of deposit*	$	7,533	$	—	$	—	$	7,533
Municipal bonds		3,469		—		—		3,469
Total	$	11,002	$	—	$	—	$	11,002
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	$	10,802
After one year through five years		200
After five years through ten years		—
After ten years		—
Total	$	11,002