Marketable Securities (Tables)

9 Months Ended

Apr. 30, 2013

Investments, Debt and Equity Securities [Abstract]

Summary of marketable securities

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
	(in thousands)
Available-for-sale securities:
Certificates of deposit*	$	6,247	$	—	$	—	$	6,247
Federal Farm Credit Bank debt security		260		—		—		260
Municipal bonds		4,323		—		—		4,323
Total	$	10,830	$	—	$	—	$	10,830

*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	$	10,830
After one year through five years		—
After five years through ten years		—
After ten years		—
Total	$	10,830