Regulatory Capital (Bank's Actual Capital Amounts And Ratios) (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Sep. 30, 2018
Consolidated
Total capital (to risk weighted assets) Actual Amount	$ 117,981	$ 114,911
Tier 1 capital (to risk-weighted assets) Actual Amount	88,683	85,927
Common equity tier 1 capital (to risk-weighted assets) Actual Amount	88,683	85,927
Tier 1 capital (to average adjusted total assets) Actual Amount	$ 88,683	$ 85,927
Total capital (to risk weighted assets) Actual Ratio	14.27%	14.50%
Tier 1 capital (to risk-weighted assets) Actual Ratio	10.73%	10.84%
Common equity tier 1 capital (to risk-weighted assets) Actual Ratio	10.73%	10.84%
Tier 1 capital (to average adjusted total assets) Actual Ratio	8.50%	8.39%
Total capital (to risk weighted assets) Minimum For Capital Adequacy Purposes Amount	$ 66,125	$ 63,402
Tier 1 capital (to risk-weighted assets) Minimum For Capital Adequacy Purposes Amount	49,594	47,551
Common equity tier 1 capital (to risk-weighted assets) Minimum For Capital Adequacy Purposes Amount	37,195	35,663
Tier 1 capital (to average adjusted total assets) Minimum For Capital Adequacy Purposes Amount	$ 41,756	$ 40,982
Total capital (to risk weighted assets) Minimum For Capital Adequacy Purposes Ratio	8.00%	8.00%
Tier 1 capital (to risk-weighted assets) Minimum For Capital Adequacy Purposes Ratio	6.00%	6.00%
Common equity tier 1 capital (to risk-weighted assets) Minimum For Capital Adequacy Purposes Ratio	4.50%	4.50%
Tier 1 capital (to average adjusted total assets) Minimum For Capital Adequacy Purposes Ratio	4.00%	4.00%
Bank
Total capital (to risk weighted assets) Actual Amount	$ 105,646	$ 102,281
Tier 1 capital (to risk-weighted assets) Actual Amount	96,026	92,958
Common equity tier 1 capital (to risk-weighted assets) Actual Amount	96,026	92,958
Tier 1 capital (to average adjusted total assets) Actual Amount	$ 96,026	$ 92,958
Total capital (to risk weighted assets) Actual Ratio	12.79%	12.92%
Tier 1 capital (to risk-weighted assets) Actual Ratio	11.63%	11.75%
Common equity tier 1 capital (to risk-weighted assets) Actual Ratio	11.63%	11.75%
Tier 1 capital (to average adjusted total assets) Actual Ratio	9.23%	9.10%
Total capital (to risk weighted assets) Minimum For Capital Adequacy Purposes Amount	$ 66,067	$ 63,312
Tier 1 capital (to risk-weighted assets) Minimum For Capital Adequacy Purposes Amount	49,550	47,484
Common equity tier 1 capital (to risk-weighted assets) Minimum For Capital Adequacy Purposes Amount	37,163	35,613
Tier 1 capital (to average adjusted total assets) Minimum For Capital Adequacy Purposes Amount	$ 41,603	$ 40,840
Total capital (to risk weighted assets) Minimum For Capital Adequacy Purposes Ratio	8.00%	8.00%
Tier 1 capital (to risk-weighted assets) Minimum For Capital Adequacy Purposes Ratio	6.00%	6.00%
Common equity tier 1 capital (to risk-weighted assets) Minimum For Capital Adequacy Purposes Ratio	4.50%	4.50%
Tier 1 capital (to average adjusted total assets) Minimum For Capital Adequacy Purposes Ratio	4.00%	4.00%
Total capital (to risk weighted assets) Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 82,583	$ 79,140
Tier 1 capital (to risk-weighted assets) Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	66,067	63,312
Common equity tier 1 capital (to risk-weighted assets) Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	53,679	51,441
Tier 1 capital (to average adjusted total assets) Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 52,004	$ 51,050
Total capital (to risk weighted assets) Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	10.00%	10.00%
Tier 1 capital (to risk-weighted assets) Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	8.00%	8.00%
Common equity tier 1 capital (to risk-weighted assets) Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	6.50%	6.50%
Tier 1 capital (to average adjusted total assets) Minimum To Be Well Capitalized Under Prompt Corrective Action Provisions Ratio	5.00%	5.00%

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Represent the Common Equity Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets.

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Represent the Common Equity Tier One Risk Based Capital Required To Be Well Capitalized.

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Represent the Common Equity Tier One Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets.

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Represent the Common Equity Tier One Risk Based Capital To Risk Weighted Assets.

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The amount of total capital as defined in the regulations.

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The minimum amount of Total Capital required for capital adequacy purposes under the regulatory framework for prompt corrective action.

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The minimum Total risk based capital ratio (total capital divided by risk weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action.

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The amount of Total Capital required to be categorized as well as capitalized under the regulatory framework for prompt corrective action.

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The Total risk based capital ratio (total capital divided by risk weighted assets) required to be categorized as "well capitalized", in the regulatory framework for prompt corrective action.

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Total Capital divided by risk weighted assets as defined in the regulations.

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Tier 1 Leverage Capital as defined in the regulations. Also called Core Capital.

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The minimum amount of Tier 1 Leverage Capital required for capital adequacy purposes under the regulatory framework for prompt corrective action.

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The amount of Tier 1 Leverage Capital required to be categorized as well capitalized under the regulatory framework for prompt corrective action.

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The amount of Tier 1 Leverage Capital required to be categorized as well capitalized divided by average assets as defined in the regulatory framework for prompt corrective action.

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Tier 1 Leverage Capital divided by average assets as defined in the regulations.

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Tier 1 Risk Based Capital as defined in the regulations.

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The minimum amount of Tier 1 Risk Based Capital required for capital adequacy purposes under the regulatory framework for prompt corrective action.

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The minimum Tier One Capital Ratio (Tier one capital divided by risk-weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action.

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The amount of Tier 1 Risk Based Capital required to be categorized as well capitalized under the regulatory framework for prompt corrective action.

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The Tier 1 capital ratio (Tier 1 capital divided by risk weighted assets) required to be categorized as "well capitalized" under the regulatory framework for prompt corrective action.

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Tier 1 capital divided by risk weighted assets as defined by regulations.

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