Fair Value Measurements (Tables)

6 Months Ended

Mar. 31, 2012

Assets and Liabilities Measured at Fair Value on Recurring Basis

Assets and liabilities of the Company measured at fair value on a recurring basis as of March 31, 2012 and September 30, 2011 are summarized as follows (in thousands):

			Fair Value Measurements at Reporting Date Using
Description	March 31, 2012		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets
Cash Equivalents	$	29,532	$	29,532	$	—	$	—
Available-for-sale securities		123,116		67,378		55,738		—
Total Assets	$	152,648	$	96,910	$	55,738	$	—
			Fair Value Measurements at Reporting Date Using
Description	September 30, 2011		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets
Cash Equivalents	$	9,576	$	9,576	$	—	$	—
Available-for-sale securities		146,985		63,331		83,654		—
Total Assets	$	156,561	$	72,907	$	83,654	$	—