Marketable Securities (Tables)

6 Months Ended

Mar. 31, 2016

Marketable Securities [Abstract]

Schedule of Marketable Securities

At March 31, 2016 our marketable securities were (in thousands):

	Amortized Cost (1)		Unrealized Gains		Unrealized Losses			Fair Value (1)
Current marketable securities:
Corporate bonds	$	25,033	$	—	$	(31	)	$	25,002
Commercial paper	17,974		—		(14		)	17,960
Certificates of deposit	2,002		2		—			2,004
Government municipal bonds	3,153		—		(5		)	3,148
Current marketable securities	48,162		2		(50		)	48,114
Non-current marketable securities:
Certificates of deposit	7,260		32		—			7,292
Total marketable securities	$	55,422	$	34	$	(50	)	$	55,406

(1) Included in amortized cost and fair value is purchased and accrued interest of $209.

6. MARKETABLE SECURITIES (CONTINUED)

At September 30, 2015 our marketable securities were (in thousands):

	Amortized Cost (1)		Unrealized Gains		Unrealized Losses			Fair Value (1)
Current marketable securities:
Corporate bonds	$	31,753	$	—	$	(39	)	$	31,714
Commercial paper	7,986		—		(1		)	7,985
Certificates of deposit	6,253		8		—			6,261
Government municipal bonds	1,232		—		(1		)	1,231
Current marketable securities	47,224		8		(41		)	47,191
Non-current marketable securities:
Corporate bonds	4,138		—		(12		)	4,126
Certificates of deposit	7,511		2		(6		)	7,507
Government municipal bonds	1,996		—		(3		)	1,993
Non-current marketable securities	13,645		2		(21		)	13,626
Total marketable securities	$	60,869	$	10	$	(62	)	$	60,817

(1) Included in amortized cost and fair value is purchased and accrued interest of $252.

Schedule of Unrealized Losses on Available-For-Sale Securities

The following tables show the fair values and gross unrealized losses of our available-for-sale marketable securities that have been in a continuous unrealized loss position deemed to be temporary, aggregated by investment category (in thousands):

	March 31, 2016
	Less than 12 Months					More than 12 Months
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Corporate bonds	$	19,843	$	(30	)	$	3,002	$	(1	)
Commercial paper	17,960		(14		)	—		—
Government municipal bonds	3,084		(5		)	—		—
Total	$	40,887	$	(49	)	$	3,002	$	(1	)

	September 30, 2015
	Less than 12 Months					More than 12 Months
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Corporate bonds	$	33,664	$	(52	)	$	—	$	—
Commercial paper	5,987		(1		)	—		—
Certificates of deposit	4,244		(6		)	499		(1		)
Government municipal bonds	3,159		(3		)	—		—
Total	$	47,054	$	(62	)	$	499	$	(1	)