Short-term Investments (Tables)

9 Months Ended

Jun. 30, 2012

Short-term Investments [Abstract]

Short-term investments

	As of June 30, 2012 (in thousands)
	Amortized Cost		Unrealized Gains		Unrealized Losses			Estimated Fair Value
Short-term investments:
Corporate	$	10,586	$	—	$	(12	)	$	10,574
Government		8,353		3		—			8,356
Total	$	18,939	$	3	$	(12	)	$	18,930