Investments - Amortized Cost, Unrealized Holding Gains (Losses) and Fair Value of Available-for-Sale Securities (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 20,619	$ 18,347
Unrealized Gains	536	1,617
Unrealized Losses	(97)	(101)
Fair Value	21,058us-gaap_AvailableForSaleSecurities	19,863us-gaap_AvailableForSaleSecurities
Municipal bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	895	1,173
Unrealized Gains	3	5
Unrealized Losses	(3)	(3)
Fair Value	895	1,175
Corporate bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1,827	1,829
Unrealized Gains	5	6
Unrealized Losses	(2)	(5)
Fair Value	1,830	1,830
U.S. government and government agency obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	10,228	7,397
Unrealized Gains	13	12
Unrealized Losses	(10)	(15)
Fair Value	10,231	7,394
Mortgage-backed securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	5,402	5,576
Unrealized Gains	51	43
Unrealized Losses	(77)	(74)
Fair Value	5,376	5,545
Asset-backed securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	2,265	2,370
Unrealized Gains	2	3
Unrealized Losses	(5)	(4)
Fair Value	2,262	2,369
Equity securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	2	2
Unrealized Gains	462	1,548
Fair Value	$ 464	$ 1,550

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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-Name Accounting Standards Codification

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Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

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Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

+ References

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This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

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