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Note 11 - Summary of Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Sep. 30, 2017
Held-to-maturity securities, amortized cost	$ 137,239	$ 120,021
Held-to-maturity securities, gross unrealized gains	48	442
Held-to-maturity securities, gross unrealized losses	1,483	156
Held-to-maturity securities, fair market value	135,804	120,307
Available-for-sale securities, amortized cost	29,743	29,794
Available-for-sale securities, gross unrealized gains	517	788
Available-for-sale securities, gross unrealized losses	345	322
Available-for-sale securities, fair market value	29,915	30,260
Corporate Bond Securities [Member]
Held-to-maturity securities, amortized cost	130,359	114,101
Held-to-maturity securities, gross unrealized gains	45	424
Held-to-maturity securities, gross unrealized losses	1,478	155
Held-to-maturity securities, fair market value	128,926	114,370
Mutual Funds [Member]
Available-for-sale securities, amortized cost	12,952	13,003
Available-for-sale securities, gross unrealized gains		77
Available-for-sale securities, gross unrealized losses	234	240
Available-for-sale securities, fair market value	12,718	12,840
Certificates of Deposit [Member]
Held-to-maturity securities, amortized cost	6,880	5,920
Held-to-maturity securities, gross unrealized gains	3	18
Held-to-maturity securities, gross unrealized losses	5	1
Held-to-maturity securities, fair market value	6,878	5,937
Preferred Stock [Member]
Available-for-sale securities, amortized cost	16,791	16,791
Available-for-sale securities, gross unrealized gains	517	711
Available-for-sale securities, gross unrealized losses	111	82
Available-for-sale securities, fair market value	$ 17,197	$ 17,420

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- Definition

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

+ References

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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.

+ References

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-Publisher FASB
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-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
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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.

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Amount of accumulated unrecognized gain on investment in debt security measured at amortized cost (held-to-maturity).

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-Name Accounting Standards Codification
-Topic 320
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Amount of accumulated unrealized loss on investment in debt security measured at amortized cost (held-to-maturity).

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Amount, before other-than-temporary impairment (OTTI) accretion, of investment in debt securities measured at amortized cost (held-to-maturity).

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