Fair Value Measurements (Tables)

6 Months Ended

Mar. 31, 2014

Fair Value Disclosures [Abstract]

Fair Value of Assets Measured on Recurring Basis

The following tables provide information by level for financial assets that are measured at fair value on a recurring basis (in thousands):

			Fair Value Measurements at March 31, 2014 using:
	Total carrying value at March 31, 2014		Quoted price in active markets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)
Cash equivalents:
Money market	$	9,673	$	9,673	$	—	$	—
Available-for-sale marketable securities:
Corporate bonds	38,208		—		38,208		—
Certificates of deposit	11,514		—		11,514		—
Government municipal bonds	6,117		—		6,117		—
Total cash equivalents and marketable securities measured at fair value	$	65,512	$	9,673	$	55,839	$	—

			Fair Value Measurements at September 30, 2013 using:
	Total carrying value at September 30, 2013		Quoted price in active markets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)
Cash equivalents:
Money market	$	3,957	$	3,957	$	—	$	—
Available-for-sale marketable securities:
Corporate bonds	41,574		—		41,574		—
Certificates of deposit	12,707		—		12,707		—
Government municipal bonds	10,114		—		10,114		—
Total cash equivalents and marketable securities measured at fair value	$	68,352	$	3,957	$	64,395	$	—