Fair Value of Financial Instruments (Tables)

9 Months Ended

Jun. 30, 2017

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 June 30, 2017
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable (Level 2)		Significant Unobservable (Level 3)		Totals
Short-term investments
Corporate bonds	$	23,711	$	—	$	—	$	23,711
Government bonds		12,750		—		—		12,750
Total	$	36,461	$	—	$	—	$	36,461

	As of September 30, 2016
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable (Level 2)		Significant Unobservable (Level 3)		Totals
Short-term investments
Corporate bonds	$	17,323	$	—	$	—	$	17,323
Government bonds		10,168		—		—	$	10,168
Foreign currency forward contract		—		5		—		5
Total	$	27,491	$	5	$	—	$	27,496