Marketable Securities (Tables)

12 Months Ended

Sep. 30, 2017

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 September 30, 2017 and 2016 (in thousands):

			Gross		Gross
	Amortized		Unrealized		Unrealized
	Cost		Gains		Losses		Fair Value
September 30, 2017 :
Corporate securities	$	2,642	$	—	$	—	$	2,642
Other debt securities		28		—		—		28
	$	2,670	$	—	$	—	$	2,670
September 30, 2016 :
Corporate securities	$	2,394	$	—	$	—	$	2,394
Other debt securities		39		—		—		39
Municipal securities		3,704		1		(3)		3,702
	$	6,137	$	1	$	(3)	$	6,135

Fair Value of Marketable Securities by Contractual Maturity

The fair values of the marketable securities by contractual maturities at September 30, 2017 are presented below (in thousands).

	Fair Value
Due in one year or less	$	28
Due after ten years		2,642
Total marketable securities	$	2,670