Fair Value Measurements (Tables)

12 Months Ended

Sep. 30, 2013

Fair Value Disclosures [Abstract]

Assets Measured on Recurring Basis

The following tables represent the Company’s fair value hierarchy for financial assets measured at fair value on a recurring basis:

	September 30, 2013		September 30, 2012
	(Level 1)		(Level 1)
	(In thousands)
Money market instruments (1)	$	19,318	$	34,317
Semiconductor Manufacturing International Corp.
(SMIC) common stock (2)	1,793		1,099
Nanya Technology Corporation (Nanya) common stock (3)	16,624		14,752
	$	37,735	$	50,168

(1) Included in cash and cash equivalents

(2) Included in short-term investments

(3) Included in short-term investments at September 30, 2013 and in other assets at September 30, 2012

Available-for-sale Securities

Available-for-sale marketable securities consisted of the following:

	Amortized Cost			Gross Unrealized Holding Gains		Gross Unrealized Holding Losses		Fair Value
	(in thousands)
September 30, 2013
Money market instruments	$	19,318		$	—	$	—	$	19,318
Certificates of deposit	15,595			—		—		15,595
SMIC common stock	1,099			694		—		1,793
Nanya common stock	7,100			9,524		—		16,624
Total	43,112			10,218		—		53,330
Less: Amounts included in cash and cash
equivalents	(31,772		)	—		—		(31,772		)
	$	11,340		$	10,218	$	—	$	21,558

	Amortized Cost			Gross Unrealized Holding Gains		Gross Unrealized Holding Losses			Fair Value
	(in thousands)
September 30, 2012
Money market instruments	$	34,317		$	—	$	—		$	34,317
Certificates of deposit	18,302			—		—			18,302
SMIC common stock	1,099			—		—			1,099
Nanya common stock	16,587			—		(1,835		)	14,752
Total	70,305			—		(1,835		)	68,470
Less: Amounts included in cash and cash
equivalents	(47,177		)	—		—			(47,177		)
	$	23,128		$	—	$	(1,835	)	$	21,293