Fair Value of Financial Instruments (Tables)

3 Months Ended

Dec. 31, 2014

Fair Value Disclosures [Abstract]

Fair Value Measurement of Company's Short-term Investments and Derivative Instruments

The fair value measurement of the Company’s short-term investments and derivative instruments was determined using the following inputs (in thousands):

	As of December 31, 2014
			Quoted Prices in		Significant
			ActiveMarketsfor		Other		Significant
			Identical Assets		Observable		Unobservable
	Total		(Level 1)		(Level 2)		(Level 3)
Short-term investments:
Corporate bonds	$	14,942	$	14,942	$	—	$	—
Government bonds		4,713		4,713		—		—
Foreign currency forward contract		641		—		641		—
Total	$	20,296	$	19,655	$	641	$	—

	As of September 30, 2014
			Quoted Prices in		Significant
			ActiveMarketsfor		Other		Significant
			Identical Assets		Observable		Unobservable
	Total		(Level 1)		(Level 2)		(Level 3)
Short-term investments:
Corporate bonds	$	14,235	$	14,235	$	—	$	—
Government bonds		5,626		5,626		—		—
Foreign currency forward contract		795		—		795		—
Total	$	20,656	$	19,861	$	795	$	—