Investments in U.S. Treasury Securities

12 Months Ended

Oct. 31, 2012

Schedule of Investments [Abstract]

Investments

Note 3. Investments

The following table summarizes the amortized cost basis and fair value of our investments in U.S. treasury securities at October 31, 2012 and 2011:

	Amortized cost		Gross unrealized gains		Gross unrealized (losses)		Fair value
U.S. government obligations
At October 31, 2012	$	—	$	—	$	—	$	—
At October 31, 2011	$	12,016	$	14	$	—	$	12,030