Fair Value Measurements (Tables)

12 Months Ended

Sep. 30, 2014

Fair Value Disclosures [Abstract]

Assets and Liabilities Measured at Fair Value on a Recurring Basis

Assets and liabilities of the Company measured at fair value on a recurring basis as of September 30, 2014 and 2013 are summarized as follows (in thousands): 

			Fair Value Measurements at Reporting Date Using
Description	September 30, 2014		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets
Cash equivalents	$	6,404	$	5,166	$	1,238	$	—
Available-for-sale securities	151,342		—		151,342		—
Total Assets	$	157,746	$	5,166	$	152,580	$	—
Liabilities
Foreign exchange contracts	$	58	$	—	$	58	$	—

			Fair Value Measurements at Reporting Date Using
Description	September 30, 2013		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets
Cash equivalents	$	7,754	$	6,152	$	1,602	$	—
Available-for-sale securities	90,391		2,199		88,192		—
Foreign exchange contracts	31		—		31		—
Total Assets	$	98,176	$	8,351	$	89,825	$	—
Liabilities
Foreign exchange contracts	$	5	$	—	$	5	$	—