Marketable Securities (Tables)

6 Months Ended

Mar. 31, 2018

Marketable Securities [Abstract]

Schedule of Marketable Securities

At March 31, 2018 our marketable securities were (in thousands):

	Amortized Cost (1)		Unrealized Gains		Unrealized Losses			Fair Value (1)
Current marketable securities:
Certificates of deposit	$	4,766	$	—	$	(9	)	$	4,757
Non-current marketable securities:
Certificates of deposit	2,509		—		(20		)	2,489
Total marketable securities	$	7,275	$	—	$	(29	)	$	7,246

(1) Included in amortized cost and fair value is purchased and accrued interest of $25.

6. MARKETABLE SECURITIES (CONTINUED)

At September 30, 2017 our marketable securities were (in thousands):

	Amortized Cost (1)		Unrealized Gains		Unrealized Losses			Fair Value (1)
Current marketable securities:
Corporate bonds	$	28,275	$	—	$	(20	)	$	28,255
Certificates of deposit	3,756		4		—			3,760
Current marketable securities	32,031		4		(20		)	32,015
Non-current marketable securities:
Certificates of deposit	4,757		—		(4		)	4,753
Total marketable securities	$	36,788	$	4	$	(24	)	$	36,768

(1) Included in amortized cost and fair value is purchased and accrued interest of $211.

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, 2018
	Less than 12 Months					More than 12 Months
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Certificates of deposit	6,745		(28		)	250		(1		)
Total	$	6,745	$	(28	)	$	250	$	(1	)

	September 30, 2017
	Less than 12 Months					More than 12 Months
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Corporate bonds	$	26,196	$	(20	)	$	—	$	—
Certificates of deposit	3,751		(4		)	—		—
Total	$	29,947	$	(24	)	$	—	$	—