Marketable Securities (Tables)

6 Months Ended

Mar. 31, 2016

Investments, Debt and Equity Securities [Abstract]

Summary of Marketable Securities Including Accrued Interest Receivable

The following is a summary of the amortized cost and the fair value, including accrued interest receivable, as well as unrealized holding gains (losses) on the short-term and long-term marketable securities as of March 31, 2016 and September 30, 2015 (in thousands):

	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
March 31, 2016:
Corporate securities	$	2,283	$	—	$	—		$	2,283
Other debt securities	66		—		—			66
Municipal securities	3,775		2		(1		)	3,776
Total marketable securities	$	6,124	$	2	$	(1	)	$	6,125
September 30, 2015:
U.S. Treasury securities and obligations of U.S. government agencies	$	30,343	$	39	$	—		$	30,382
Corporate securities	54,725		13		(48		)	54,690
Mortgage-backed securities	857		27		—			884
Other debt securities	5,056		3		—			5,059
Municipal securities	30,258		18		(9		)	30,267
Bank certificate of deposits	12,024		2		—			12,026
	$	133,263	$	102	$	(57	)	$	133,308

Fair Value of Marketable Securities by Contractual Maturity

The fair values of the marketable securities by contractual maturities at March 31, 2016 are presented below (in thousands):

	Fair Value
Due in one year or less	$	66
Due after one year through five years	3,776
Due after ten years	2,283
Total marketable securities	$	6,125