Short-Term and Long-Term Investments (Tables)

12 Months Ended

Oct. 31, 2012

Investments, Debt and Equity Securities [Abstract]

Short-term and Long-term investments

As of October 31, 2011, long-term investments are comprised of the following (in thousands):

	October 31, 2011
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
US government obligations	$	49,933	$	331	$	—	$	50,264
	$	49,933	$	331	$	—	$	50,264

As of October 31, 2012, short-term investments have final legal maturities of less than one year and are comprised of the following (in thousands):

	October 31, 2012
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
US government obligations	$	49,987	$	70	$	—	$	50,057
	$	49,987	$	70	$	—	$	50,057