Marketable Securities (Tables)

9 Months Ended

Apr. 30, 2014

Marketable Securities [Abstract]

Summary of Marketable Securities

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
	(in thousands)
Available-for-sale securities:
April 30, 2014:
Certificates of deposit*	$	8,400	$	—	$	—	$	8,400
Municipal bonds		3,962		—		—		3,962
Total	$	12,362	$	—	$	—	$	12,362
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	$	12,114
After one year through five years		248
After five years through ten years		—
After ten years		—
Total	$	12,362