Marketable Securities (Tables)

3 Months Ended

Dec. 31, 2017

At December 31, 2017 our marketable securities were (in thousands):



	Amortized Cost (1)		Unrealized Gains		Unrealized Losses			Fair Value (1)
Current marketable securities:
Corporate bonds	$	24,217	$	—	$	(26	)	$	24,191
Certificates of deposit	4,013		1		(1		)	4,013
Current marketable securities	28,230		1		(27		)	28,204
Non-current marketable securities:
Certificates of deposit	4,262		—		(15		)	4,247
Total marketable securities	$	32,492	$	1	$	(42	)	$	32,451


(1)	Included in amortized cost and fair value is purchased and accrued interest of $201.

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):



	December 31, 2017
	Less than 12 Months					More than 12 Months
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
Corporate bonds	$	24,191	$	(26	)	$	—	$	—
Certificates of deposit	5,754		(16		)	—		—
Total	$	29,945	$	(42	)	$	—	$	—



	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	)	$	—	$	—