Fair Value Measurements (Tables)

3 Months Ended

Dec. 31, 2013

Fair Value Disclosures [Abstract]

Assets Measured on Recurring Basis

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

	December 31, 2013		September 30, 2013
	(Level 1)		(Level 1)
	(In thousands)
Money market instruments (1)	$	19,319	$	19,318
Semiconductor Manufacturing International Corp.
(SMIC) common stock (2)	2,351		1,793
Nanya Technology Corporation (Nanya) common stock (2)	9,021		16,624
	$	30,691	$	37,735

(1) Included in cash and cash equivalents

(2) Included in short-term investments

Available-for-sale Securities

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

December 31, 2013	Amortized Cost			Gross Unrealized Holding Gains		Gross Unrealized Holding Losses		Fair Value
				(In thousands)
Money market instruments	$	19,319		$	—	$	—	$	19,319
Certificates of deposit	14,160			—		—		14,160
SMIC common stock	1,099			1,252		—		2,351
Nanya common stock	4,324			4,697		—		9,021
Total	38,902			5,949		—		44,851
Less: Amounts included in cash and cash
equivalents	(31,485		)	—		—		(31,485		)
	$	7,417		$	5,949	$	—	$	13,366
September 30, 2013	Amortized Cost			Gross Unrealized Holding Gains		Gross Unrealized Holding Losses		Fair Value
				(In thousands)
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