Timberland Bancorp (TSBK) 10-Q 7 May 21 2021 Q2 Quarterly report Financial data

Cover

Cover - $ / shares	6 Months Ended
	Mar. 31, 2021	May 04, 2021	Sep. 30, 2020
Document and Entity Information
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2021
Document Transition Report	false
Entity File Number	000-23333
Entity Incorporation, State or Country Code	WA
Entity Tax Identification Number	91-1863696
Entity Address, Address Line One	624 Simpson Avenue
Entity Address, City or Town	Hoquiam
Entity Address, State or Province	WA
Entity Address, Postal Zip Code	98550
City Area Code	(360)
Local Phone Number	533-4747
Title of 12(b) Security	Common stock, $.01 par value
Trading Symbol	TSBK
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (in shares)		8,362,907
Common stock par value (in dollars per share)	$ 0.01		$ 0.01
Entity Registrant Name	TIMBERLAND BANCORP, INC.
Entity Central Index Key	0001046050
Current Fiscal Year End Date	--09-30
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q2
Amendment Flag	false

Recent Accounting Pronouncement

Recent Accounting Pronouncements	6 Months Ended
	Mar. 31, 2021
Accounting Changes and Error Corrections [Abstract]
Recent Accounting Pronouncements	RECENT ACCOUNTING PRONOUNCEMENTS In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses , as amended by ASU 2018-19, ASU 2019-04, ASU 2019-05, ASU 2019-10 and ASU 2019-11. ASU 2016-13 replaces the existing incurred losses methodology with a current expected losses methodology with respect to most financial assets measured at amortized cost and certain other instruments, including trade and other receivables, loans, held to maturity investment securities and off-balance sheet commitments. In addition, ASU 2016-13 requires credit losses relating to available for sale debt securities to be recorded through an allowance for credit losses rather than as a reduction of the carrying amount. ASU 2016-13 also changes the accounting for purchased credit-impaired securities and loans. ASU 2016-13 retains many of the current disclosure requirements in GAAP and expands certain disclosure requirements. ASU 2016-13 is effective for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years. Upon adoption, the Company expects a change in the processes and procedures to calculate the allowance for loan losses, including changes in the assumptions and estimates to consider expected credit losses over the life of the loan versus the current accounting practice that utilizes the incurred loss model. In addition, the current policy for OTTI on investment securities available for sale will be replaced with an allowance approach. The Company is reviewing the requirements of ASU 2016-13 and has begun developing and implementing processes and procedures to help ensure that it is fully compliant with the amendments at the adoption date. At this time, the Company anticipates the allowance for loan losses will increase as a result of the implementation of this ASU; however, until its evaluation is complete, the magnitude of the increase will be unknown. In January 2017, the FASB issued ASU 2017-04, Intangibles - Goodwill and Other: Simplifying the Test for Goodwill Impairment. This ASU simplifies the subsequent measurement of goodwill and eliminates Step 2 from the goodwill impairment test. In computing the implied fair value of goodwill under Step 2, an entity had to perform procedures to determine the fair value of its assets and liabilities (including unrecognized assets and liabilities) at the impairment testing date following the procedure that would be required in determining the fair value of assets acquired and liabilities assumed in a business combination. Under ASU 2017-04, an entity should perform its annual, or interim, goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount. An entity should recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit's fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. Additionally, an entity should consider income tax effects from any tax deductible goodwill on the carrying amount of the reporting unit when measuring the goodwill impairment loss, if applicable. ASU 2017-04 is effective for annual or interim goodwill impairment tests in fiscal years beginning after December 15, 2022. The adoption ASU 2017-04 is not expected to a have a material impact on the Company's future consolidated financial statements. In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement . This ASU modifies the disclosure requirements for fair value measurements. The following disclosure requirements were removed from ASC Topic 820, Fair Value Measurement : (1) the amount of and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy; (2) the policy for timing of transfers between levels; and (3) the valuation process for Level 3 fair value measurements. This ASU clarifies that the measurement uncertainty disclosure is to communicate information about the uncertainty in measurement as of the reporting date. This ASU adds the following disclosure requirements for Level 3 measurements: (1) changes in unrealized gains and losses for the period included in other comprehensive income for the recurring Level 3 fair value measurements held at the end of the reporting period, and (2) the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements. ASU 2018-13 was effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. The Company adopted ASU 2018-13 effective October 1, 2020, and it did not have a material impact on the Company's unaudited interim consolidated financial statements. In August 2018, the FASB issued ASU 2018-15, Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40), Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract . The amendments in this ASU broaden the scope of ASC Subtopic 350-40 to include costs incurred to implement a hosting arrangement that is a service contract. The amendments align the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). The costs are capitalized or expensed depending on the nature of the costs and the project stage during which they are incurred, consistent with the accounting for internal-use software costs. The amendments in this ASU result in consistent capitalization of implementation costs of a hosting arrangement that is a service contract and implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). The accounting for the service element of a hosting arrangement that is a service contract is not affected by the amendments in this ASU. ASU 2018-15 was effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. The Company adopted ASU 2018-15 effective October 1, 2020, and it did not have a material impact on the Company's unaudited interim consolidated financial statements. In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740), Simplifying the accounting for Income Taxes. The amendments in this ASU simplify the accounting for income taxes by removing certain exceptions to the general principles in Topic 740. The amendments also improve consistent application of and simplify GAAP for other areas of Topic 740 by clarifying and amending existing guidelines. ASU 2019-12 is effective for fiscal years beginning after December 15, 2020, including interim periods within those fiscal years. The adoption of ASU 2019-12 is not expected to have a material impact on the Company's future consolidated financial statements. In March 2020, the FASB issued ASU No. 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting. This ASU applies to contracts, hedging relationships and other transactions that reference the London Interbank Offered Rate ("LIBOR") or other rate references expected to be discontinued because of reference rate reform. The ASU permits an entity to make necessary modifications to eligible contracts or transactions without requiring contract remeasurement or reassessment of a previous accounting determination. This ASU is effective for all entities as of March 12, 2020 through December 31, 2022. The Company has not adopted ASU 2020-04 as of March 31, 2021. The adoption of ASU 2020-04 is not expected to have a material impact on the Company's future consolidated financial statements. On March 22, 2020, federal banking regulators issued an interagency statement that included guidance on their approach for the accounting for loan modifications in light of the economic impact of the COVID-19 pandemic. The guidance interprets current accounting standards and indicates that a lender can conclude that a borrower is not experiencing financial difficulty if short-term modifications are made in response to COVID-19, such as payment deferrals, fee waivers, extensions of repayment terms, or other delays in payment that are insignificant related to the loans in which the borrower is less than 30 days past due on its contractual payments at the time a modification is implemented. The agencies confirmed in working with the staff of the FASB that short-term modifications made on a good faith basis in response to COVID-19 to borrowers who were current prior to any relief are not TDRs.

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2021	Sep. 30, 2020
Cash and cash equivalents:
Cash and due from financial institutions	$ 21,707	$ 21,877	[1]
Interest-bearing deposits in banks	411,635	292,575	[1]
Total cash and cash equivalents	433,342	314,452	[1]
Certificates of deposit (“CDs”) held for investment (at cost, which      approximates fair value)	39,674	65,545	[1]
Investment securities held to maturity, at amortized cost (estimated fair value of $37,838 and $29,827)	36,465	27,890	[1]
Investment securities available for sale, at fair value	69,184	57,907	[1]
Investments in equity securities, at fair value	957	977
Federal Home Loan Bank of Des Moines (“FHLB”) stock, at cost	2,303	1,922	[1]
Other investments, at cost	3,000	3,000	[1]
Loans held for sale	8,455	4,509	[1]
Loans receivable, net of allowance for loan losses of $13,434 and $13,414	1,030,683	1,013,875	[1]
Premises and equipment, net	22,763	23,035	[1]
Other real estate owned (“OREO”) and other repossessed assets, net	157	1,050	[1]
Accrued interest receivable	4,471	4,484	[1]
Bank owned life insurance (“BOLI”)	21,891	21,596	[1]
Goodwill	15,131	15,131	[1]
Core deposit intangible (“CDI”), net	1,444	1,625
Servicing rights, net	3,604	3,095	[1]
Operating lease right-of-use ("ROU") assets	2,436	2,587	[1]
Other assets	3,284	3,298	[1]
Total assets	1,699,244	1,565,978	[1]
Deposits:
Non-interest-bearing demand	499,541	441,889	[1]
Interest-bearing	982,318	916,517	[1]
Total deposits	1,481,859	1,358,406	[1]
FHLB borrowings	10,000	10,000	[1]
Operating lease liabilities	2,499	2,630
Other liabilities and accrued expenses	6,343	7,312	[1]
Total liabilities	1,500,701	1,378,348	[1]
Shareholders’ equity
Preferred stock, $0.01 par value; 1,000,000 shares authorized; none issued	0	0	[2]
Common stock, $0.01 par value; 50,000,000 shares authorized; 8,361,457 shares issued and outstanding - March 31, 2021 8,310,793 shares issued and outstanding - September 30, 2020	42,949	42,396	[2]
Retained earnings	155,473	145,173	[2]
Accumulated other comprehensive income	121	61	[2]
Total shareholders’ equity	198,543	187,630	[2]
Total liabilities and shareholders’ equity	$ 1,699,244	$ 1,565,978	[2]
[1]	Derived from audited consolidated financial statements.
[2]	Derived from audited consolidated financial statements.

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2021	Sep. 30, 2020
Statement of Financial Position [Abstract]
Investments securities held to maturity, estimated fair value	$ 37,838	$ 29,827
Allowance for loan losses	$ 13,434	$ 13,414
Preferred stock par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock shares authorized (shares)	1,000,000	1,000,000
Preferred stock shares issued (shares)	0	0
Common stock par value (in dollars per share)	$ 0.01	$ 0.01
Common stock shares authorized (shares)	50,000,000	50,000,000
Common stock shares issued (shares)	8,361,457	8,310,793
Common stock shares outstanding (shares)	8,361,457	8,310,793

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Interest and dividend income
Loans receivable and loans held for sale	$ 12,790	$ 12,823	$ 26,108	$ 25,587
Investment securities	284	489	585	928
Dividends from mutual funds, FHLB stock and other investments	27	35	55	72
Interest-bearing deposits in banks and CDs	259	784	569	1,735
Total interest and dividend income	13,360	14,131	27,317	28,322
Interest expense
Deposits	764	1,243	1,668	2,432
FHLB borrowings	29	8	58	8
Total interest expense	793	1,251	1,726	2,440
Net interest income	12,567	12,880	25,591	25,882
Provision for loan losses	0	2,000	0	2,200
Net interest income after provision for loan losses	12,567	10,880	25,591	23,682
Non-interest income
Net recoveries on investment securities	3	3	8	106
BOLI net earnings	146	147	295	294
Gain on sales of loans, net	1,758	736	3,760	1,688
Valuation recovery (allowance) on servicing rights, net	438	0	202	(23)
Other, net	299	592	607	900
Total non-interest income, net	4,886	3,680	9,445	7,618
Non-interest expense
Salaries and employee benefits	4,778	4,621	9,391	9,343
Premises and equipment	998	943	1,955	1,837
Gain on sales/dispositions of premises and equipment, net	0	(3)	0	(102)
Advertising	155	159	311	342
OREO and other repossessed assets, net	(68)	51	(94)	50
ATM and debit card interchange transaction fees	445	359	876	799
Postage and courier	149	145	287	279
State and local taxes	255	233	538	449
Professional fees	181	210	412	480
Federal Deposit Insurance Corporation ("FDIC") insurance	105	0	201	(27)
Loan administration and foreclosure	90	78	171	167
Data processing and telecommunications	634	515	1,240	1,099
Deposit operations	245	274	529	591
Amortization of CDI	91	102	181	203
Other	493	599	963	1,149
Total non-interest expense, net	8,551	8,286	16,961	16,659
Income before income taxes	8,902	6,274	18,075	14,641
Provision for income taxes	1,651	1,225	3,534	2,940
Net income	$ 7,251	$ 5,049	$ 14,541	$ 11,701
Net income per common share
Basic (in dollars per share)	$ 0.87	$ 0.61	$ 1.75	$ 1.40
Diluted (in dollars per share)	$ 0.86	$ 0.60	$ 1.73	$ 1.38
Weighted average common shares outstanding
Basic (in shares)	8,331,121	8,344,201	8,322,210	8,342,828
Diluted (in shares)	8,444,798	8,456,659	8,428,595	8,465,894
Dividends paid per common share (in dollars per share)			$ 0.51	$ 0.45
Deposit Account
Non-interest income
Revenue from contract with customer	$ 941	$ 1,078	$ 1,996	$ 2,278
Credit and Debit Card
Non-interest income
Revenue from contract with customer	1,237	1,015	2,393	2,109
Asset Management
Non-interest income
Revenue from contract with customer	74	47	179	130
Servicing Income On Loans Sold
Non-interest income
Revenue from contract with customer	$ (10)	$ 62	$ 5	$ 136

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Comprehensive income
Net income	$ 7,251	$ 5,049	$ 14,541	$ 11,701
Unrealized holding gain (loss) on investment securities available for sale, net of income taxes of $19, $(9), $15 and $(63), respectively	74	(35)	57	(241)
Change in other than temporary impairment ("OTTI") on investment securities held to maturity, net of income taxes:
Accretion of OTTI on investment securities held to maturity, net of income taxes of $1, $1, $1 and $3, respectively	3	2	3	12
Total other comprehensive income (loss), net of income taxes	77	(33)	60	(229)
Total comprehensive income	$ 7,328	$ 5,016	$ 14,601	$ 11,472

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Statement of Comprehensive Income [Abstract]
Unrealized holding loss on investment securities available for sale, tax	$ 19	$ (9)	$ 15	$ (63)
Accretion of OTTI on investment securities held to maturity, tax	$ 1	$ 1	$ 1	$ 3

Consolidated Statements of Shar

Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total		Stock Options	Common Stock	Common StockStock Options	Retained Earnings	Accumulated Other Comprehensive Loss
Balance at beginning of period (in shares) at Sep. 30, 2019				8,329,419
Balance at beginning of period at Sep. 30, 2019	$ 171,067			$ 43,030		$ 127,987	$ 50	[1]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	11,701					11,701
Other comprehensive income (loss)	(229)						(229)
Repurchase of common stock (in shares)				(56,601)
Repurchase of common stock	$ (1,238)			$ (1,238)
Exercise of stock options (in shares)	36,375			36,375
Exercise of stock options	$ 374			$ 374
Common stock dividends	(3,759)					(3,759)
Stock option compensation expense			$ 92		$ 92
Balance at end of period (in shares) at Mar. 31, 2020				8,309,193
Balance at end of period at Mar. 31, 2020	178,008			$ 42,258		135,929	(179)	[1]
Balance at beginning of period (in shares) at Dec. 31, 2019				8,346,394
Balance at beginning of period at Dec. 31, 2019	175,653			$ 43,246		132,553	(146)	[1]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	5,049					5,049
Other comprehensive income (loss)	(33)						(33)
Repurchase of common stock (in shares)				(56,601)
Repurchase of common stock	(1,238)			$ (1,238)
Exercise of stock options (in shares)				19,400
Exercise of stock options	204			$ 204
Common stock dividends	(1,673)					(1,673)
Stock option compensation expense			46		46
Balance at end of period (in shares) at Mar. 31, 2020				8,309,193
Balance at end of period at Mar. 31, 2020	178,008			$ 42,258		135,929	(179)	[1]
Balance at beginning of period (in shares) at Sep. 30, 2020				8,310,793
Balance at beginning of period at Sep. 30, 2020	187,630	[2]		$ 42,396		145,173	61	[1]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	14,541					14,541
Other comprehensive income (loss)	60						60
Repurchase of common stock (in shares)				(2,900)
Repurchase of common stock	$ (58)			$ (58)
Exercise of stock options (in shares)	53,564			53,564
Exercise of stock options	$ 519			$ 519
Common stock dividends	(4,241)					(4,241)
Stock option compensation expense			92		92
Balance at end of period (in shares) at Mar. 31, 2021				8,361,457
Balance at end of period at Mar. 31, 2021	198,543			$ 42,949		155,473	121	[1]
Balance at beginning of period (in shares) at Dec. 31, 2020				8,317,793
Balance at beginning of period at Dec. 31, 2020	193,325			$ 42,480		150,801	44	[1]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	7,251					7,251
Other comprehensive income (loss)	77						77
Exercise of stock options (in shares)				43,664
Exercise of stock options	423			$ 423
Common stock dividends	(2,579)					(2,579)
Stock option compensation expense			$ 46		$ 46
Balance at end of period (in shares) at Mar. 31, 2021				8,361,457
Balance at end of period at Mar. 31, 2021	$ 198,543			$ 42,949		$ 155,473	$ 121	[1]
[1]	All amounts are net of income taxes.
[2]	Derived from audited consolidated financial statements.

Consolidated Statements of Sh_2

Consolidated Statements of Shareholders' Equity (Parentheticals) - $ / shares	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Common Stock
Dividends paid per common share (in dollars per share)	$ 0.31	$ 0.20

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2021		Mar. 31, 2020
Cash flows from operating activities
Net income	$ 14,541		$ 11,701
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	0		2,200
Depreciation	781		748
Deferred income taxes	51		0
Accretion of discount on purchased loans	(207)		(253)
Amortization of CDI	181		203
Stock option compensation expense	92		92
Net recoveries on investment securities	(8)		(106)
Change in fair value of investments in equity securities	20		(11)
Accretion of discounts and premiums on securities	(16)		(88)
Gain on sales of OREO and other repossessed assets, net	(92)		(39)
Provision for OREO losses	0		25
Gain on sales of loans, net	(3,760)		(1,688)
Gain on sales/disposition of premises and equipment, net	0		102
Loans originated for sale	(85,313)		(60,097)
Proceeds from sales of loans	85,127		62,058
Amortization of servicing rights	529		383
Valuation adjustment on servicing rights	(202)		23
BOLI net earnings	(295)		(294)
Increase (decrease) in deferred loan origination fees	563		(104)
Net change in accrued interest receivable and other assets, and other liabilities and accrued expenses	(1,826)		545
Net cash provided by operating activities	10,166		15,196
Cash flows from investing activities
Net decrease (increase) in CDs held for investment	25,871		(4,126)
Purchase of investment securities held to maturity	(15,050)		(9,755)
Purchase of investment securities available for sale	(16,383)		(21,521)
Proceeds from maturities and prepayments of investment securities held to maturity	6,589		4,412
Proceeds from maturities and prepayments of investment securities available for sale	5,093		2,266
Purchase of FHLB stock	(381)		(485)
Increase in loans receivable, net	(17,164)		(22,838)
Additions to premises and equipment	(509)		(1,195)
Proceeds from sales of premises and equipment	0		307
Proceeds from sales of OREO and other repossessed assets	985		74
Net cash used in investing activities	(10,949)		(52,861)
Cash flows from financing activities
Net increase in deposits	123,453		57,421
FHLB borrowings	0		10,000
Proceeds from exercise of stock options	519		374
Repurchase of common stock	(58)		(1,238)
Payment of dividends	(4,241)		(3,759)
Net cash provided by financing activities	119,673		62,798
Net increase in cash and cash equivalents	118,890		25,133
Cash and cash equivalents, at beginning of period	314,452	[1]	143,015
Cash and cash equivalents, at end of period	433,342		168,148
Supplemental disclosure of cash flow information
Income taxes paid	2,688		1,988
Interest paid	1,818		2,416
Supplemental disclosure of non-cash investing activities
Other comprehensive income (loss) related to investment securities	60		(229)
Operating lease liabilities arising from recording of ROU assets	$ 0		$ 2,889	[1]
[1]	Derived from audited consolidated financial statements.

Summary Of Significant Accounti

Summary Of Significant Accounting Policies	6 Months Ended
	Mar. 31, 2021
Accounting Policies [Abstract]
Summary Of Significant Accounting Policies	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (a) Basis of Presentation: The accompanying unaudited consolidated financial statements of Timberland Bancorp, Inc.and its wholly-owned subsidiary, Timberland Bank (the "Bank") (collectively, "the Company") were prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information and with instructions for Form 10-Q and, therefore, do not include all disclosures necessary for a complete presentation of consolidated financial condition, results of operations, and cash flows in conformity with GAAP. However, all adjustments which are, in the opinion of management, necessary for a fair presentation of the interim consolidated financial statements have been included. All such adjustments are of a normal recurring nature. The unaudited consolidated financial statements should be read in conjunction with the audited consolidated financial statements included in the Company’s Annual Report on Form 10-K for the year ended September 30, 2020 (“2020 Form 10-K”). The unaudited consolidated results of operations for the six months ended March 31, 2021 are not necessarily indicative of the results that may be expected for the entire fiscal year ending September 30, 2021. (b) Principles of Consolidation: The unaudited consolidated financial statements include the accounts of the Company and the Bank, and the Bank’s wholly-owned subsidiary, Timberland Service Corporation. All significant inter-company transactions and balances have been eliminated in consolidation. (c) Operating Segment: The Company has one reportable operating segment which is defined as community banking in western Washington. (d) The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect reported amounts of assets and liabilities, and the disclosure of contingent assets and liabilities, as of the date of the consolidated balance sheets, and the reported amounts of income and expenses during the reporting period. Actual results could differ from those estimates. (e) Certain prior period amounts have been reclassified to conform to the March 31, 2021 presentation with no change to previously reported net income or total shareholders’ equity.

Investment Securities

Investment Securities	6 Months Ended
	Mar. 31, 2021
Investments [Abstract]
Investment Securities	INVESTMENT SECURITIES Held to maturity and available for sale investment securities have been classified according to management’s intent and were as follows as of March 31, 2021 and September 30, 2020 (dollars in thousands): Amortized Gross Gross Estimated March 31, 2021 Held to maturity Mortgage-backed securities ("MBS"): U.S. government agencies $ 21,888 $ 1,164 $ (9) $ 23,043 Private label residential 5,056 312 (23) 5,345 U.S. Treasury and U.S. government agency securities 9,021 — (68) 8,953 Bank issued trust preferred securities 500 — (3) 497 Total $ 36,465 $ 1,476 $ (103) $ 37,838 Available for sale MBS: U.S. government agencies $ 69,001 $ 282 $ (99) $ 69,184 Total $ 69,001 $ 282 $ (99) $ 69,184 September 30, 2020 Held to maturity MBS: U.S. government agencies $ 27,161 $ 1,635 $ (3) $ 28,793 Private label residential 229 307 (1) 535 Bank issued trust preferred securities 500 — (1) 499 Total $ 27,890 $ 1,942 $ (5) $ 29,827 Available for sale MBS: U.S. government agencies $ 57,797 $ 178 $ (68) $ 57,907 Total $ 57,797 $ 178 $ (68) $ 57,907 Held to maturity and available for sale investment securities with unrealized losses were as follows as of March 31, 2021 (dollars in thousands): Less Than 12 Months 12 Months or Longer Total Estimated Gross Quantity Estimated Gross Quantity Estimated Gross Held to maturity MBS: U.S. government agencies $ 2,098 $ (8) 3 $ 34 $ (1) 4 $ 2,132 $ (9) Private label residential 4,836 (23) 1 2 — 2 4,838 (23) U.S. Treasury and U.S. government agency securities 8,953 (68) 3 — — — 8,953 (68) Bank issued trust preferred securities 497 (3) 1 — — — 497 (3) Total $ 16,384 $ (102) 8 $ 36 $ (1) 6 $ 16,420 $ (103) Available for sale MBS: U.S. government agencies $ 22,873 $ (99) 12 $ — $ — — $ 22,873 $ (99) Total $ 22,873 $ (99) 12 $ — $ — — $ 22,873 $ (99) Held to maturity and available for sale investment securities with unrealized losses were as follows as of September 30, 2020 (dollars in thousands): Less Than 12 Months 12 Months or Longer Total Estimated Gross Quantity Estimated Gross Quantity Estimated Gross Held to maturity MBS: U.S. government agencies $ 5,130 $ (2) 4 $ 39 $ (1) 4 $ 5,169 $ (3) Private label residential 7 — 1 11 (1) 2 18 (1) Bank issued trust preferred securities 499 (1) 1 — — — 499 (1) Total $ 5,636 $ (3) 6 $ 50 $ (2) 6 $ 5,686 $ (5) Available for sale MBS: U.S. government agencies $ 21,464 $ (68) 11 $ — $ — — $ 21,464 $ (68) Total $ 21,464 $ (68) 11 $ — $ — — $ 21,464 $ (68) The Company has evaluated the investment securities in the above tables and has determined that the declines in their fair value are temporary. The unrealized losses are primarily due to changes in market interest rates and spreads in the market for mortgage-related products. The fair value of these securities is expected to recover as the securities approach their maturity dates and/or as the pricing spreads narrow on mortgage-related securities. The Company has the ability and the intent to hold the investments until the fair value recovers. Furthermore, as of March 31, 2021, management does not have the intent to sell any of the securities classified as available for sale where the estimated fair value is below the recorded value and believes that it is more likely than not that the Company will not have to sell such securities before a recovery of cost (or recorded value if previously written down). The Company bifurcates OTTI into (1) amounts related to credit losses which are recognized through earnings and (2) amounts related to all other factors which are recognized as a component of other comprehensive income (loss). To determine the component of the gross OTTI related to credit losses, the Company compared the amortized cost basis of the OTTI security to the present value of its revised expected cash flows, discounted using its pre-impairment yield. The revised expected cash flow estimates for individual securities are based primarily on an analysis of default rates, prepayment speeds and third-party analytic reports. Significant judgment by management is required in this analysis that includes, but is not limited to, assumptions regarding the collectability of principal and interest, net of related expenses, on the underlying loans. The following table presents a summary of the significant inputs utilized to measure management’s estimates of the credit loss component on OTTI securities as of March 31, 2021 and 2020: Range Weighted Minimum Maximum Average March 31, 2021 Constant prepayment rate 6.00 % 15.00 % 13.18 % Collateral default rate 1.73 % 28.92 % 13.94 % Loss severity rate — % 18.93 % 5.79 % March 31, 2020 Constant prepayment rate 6.00 % 15.00 % 10.91 % Collateral default rate 1.86 % 22.47 % 10.44 % Loss severity rate — % 16.34 % 4.02 % The following table presents the OTTI recoveries for the three and six months ended March 31, 2021 and 2020 (dollars in thousands): Three Months Ended Three Months Ended Held To Held To Total recoveries $ 3 $ 3 Adjustment for portion of OTTI transferred from other comprehensive income (loss) before income taxes (1) — — Net recoveries recognized in earnings (2) $ 3 $ 3 Six Months Ended Six Months Ended Held To Held To Total recoveries $ 8 $ 106 Adjustment for portion of OTTI transferred from other comprehensive income (loss) before income taxes (1) — — Net recoveries recognized in earnings (2) $ 8 $ 106 _________________ (1) Represents OTTI related to all other factors. (2) Represents OTTI related to credit losses. The following table presents a roll forward of the credit loss component of held to maturity and available for sale debt securities that have been written down for OTTI with the credit loss component recognized in earnings for the six months ended March 31, 2021 and 2020 (dollars in thousands): Six Months Ended 2021 2020 Beginning balance of credit loss $ 885 $ 1,071 Subtractions: Realized losses previously recorded as credit losses (5) (60) Recovery of prior credit loss (8) (106) Ending balance of credit loss $ 872 $ 905 During the six months ended March 31, 2021, the Company recorded a $5,000 net realized loss (as a result of investment securities being deemed worthless) on 13 held to maturity investment securities, all of which had been recognized previously as a credit loss. During the six months ended March 31, 2020, the Company recorded a $60,000 net realized loss (as a result of investment securities being deemed worthless) on 19 held to maturity investment securities, all of which had been recognized previously as a credit loss. The recorded amount of investment securities pledged as collateral for public fund deposits, federal treasury tax and loan deposits, FHLB collateral and other non-profit organization deposits totaled $96.24 million and $81.03 million at March 31, 2021 and September 30, 2020, respectively. The contractual maturities of debt securities at March 31, 2021 were as follows (dollars in thousands). Expected maturities may differ from scheduled maturities due to the prepayment of principal or call provisions. Held to Maturity Available for Sale Amortized Estimated Amortized Estimated Due within one year $ — $ — $ 1,428 $ 1,421 Due after one year to five years 8,230 8,290 2,829 2,829 Due after five years to ten years 13,703 14,180 19,173 19,236 Due after ten years 14,532 15,368 45,571 45,698 Total $ 36,465 $ 37,838 $ 69,001 $ 69,184

Goodwill and CDI

Goodwill and CDI	6 Months Ended
	Mar. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and CDI	GOODWILL AND CDI Goodwill is initially recorded when the purchase price paid in a business combination exceeds the estimated fair value of the net identified tangible and intangible assets acquired and liabilities assumed. Goodwill is presumed to have an indefinite useful life and is analyzed annually for impairment. The Company performs an annual review during the third quarter of each fiscal year, or more frequently if indicators of potential impairment exist, to determine if the recorded goodwill is impaired. For purposes of goodwill impairment testing, the services offered through the Bank and its subsidiary are managed as one strategic unit and represent the Company's only reporting unit. The annual goodwill impairment test begins with a qualitative assessment of whether it is "more likely than not" that the reporting unit's fair value is less than its carrying amount. If an entity concludes that it is not "more likely than not" that the fair value of a reporting unit is less than its carrying amount, it need not perform a two-step impairment test. If the Company's qualitative assessment concluded that it is "more likely than not" that the fair value of its reporting unit is less than its carrying amount, it must perform the two-step impairment test to identify potential goodwill impairment and measure the amount of goodwill impairment loss to be recognized, if any. The first step of the goodwill impairment test compares the estimated fair value of the reporting unit with its carrying amount, or the book value, including goodwill. If the estimated fair value of the reporting unit equals or exceeds its book value, goodwill is considered not impaired, and the second step of the impairment test is unnecessary. The second step, if necessary, measures the amount of goodwill impairment loss to be recognized. The reporting unit must determine fair value for all assets and liabilities, excluding goodwill. The net of the assigned fair value of assets and liabilities is then compared to the book value of the reporting unit, and any excess book value becomes the implied fair value of goodwill. If the carrying amount of the goodwill exceeds the newly calculated implied fair value of goodwill, an impairment loss is recognized in the amount required to write-down the goodwill to the implied fair value. Management's qualitative assessment takes into consideration macroeconomic conditions, industry and market considerations, cost or margin factors, financial performance and share price of the Company's common stock. The Company performed its fiscal year 2020 goodwill impairment test during the quarter ended June 30, 2020 with the assistance of an independent third-party firm specializing in goodwill impairment valuations for financial institutions. The third-party analysis was conducted as of May 31, 2020, and the step one test concluded that the reporting unit's fair value was more than its recorded value and, therefore, step two of the analysis was not necessary. Accordingly, the recorded value of goodwill as of May 31, 2020 was not impaired. A significant amount of judgment is involved in determining if an indicator of goodwill impairment has occurred. Such indicators may include, among others: a significant decline in expected future cash flows; a sustained, significant decline in the Company's stock price and market capitalization; a significant adverse change in legal factors or in the business climate; adverse assessment or action by a regulator; and unanticipated competition. Any change in these indicators could have a significant negative impact on the Company's financial condition, impact the goodwill impairment analysis or cause the Company to perform a goodwill impairment analysis more frequently than once per year. As of March 31, 2021, management believes that there have been no events or changes in the circumstances since May 31, 2020 that would indicate a potential impairment of goodwill. No assurances can be given, however, that the Company will not record an impairment loss on goodwill in the future. If adverse economic conditions or decreases in the Company's stock price and market capitalization as a result of the novel coronavirus of 2019 ("COVID-19") pandemic were to be deemed sustained rather then temporary, it may significantly affect the fair value of the Company's goodwill and may trigger impairment charges. Any impairment charge could have a material adverse effect on the Company's results of operations and financial condition. The recorded amount of goodwill at March 31, 2021 and September 30, 2020 remained unchanged at $15.13 million.

Loans Receivable And Allowance

Loans Receivable And Allowance For Loan Losses	6 Months Ended
	Mar. 31, 2021
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
Loans Receivable And Allowance For Loan Losses	LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES Loans receivable by portfolio segment consisted of the following at March 31, 2021 and September 30, 2020 (dollars in thousands): March 31, September 30, Amount Percent Amount Percent Mortgage loans: One- to four-family (1) $ 117,184 10.3 % $ 118,580 10.5 % Multi-family 92,435 8.1 85,053 7.5 Commercial 461,966 40.5 453,574 40.0 Construction - custom and owner/builder 105,305 9.2 129,572 11.4 Construction - speculative one- to four-family 17,289 1.5 14,592 1.3 Construction - commercial 42,340 3.7 33,144 2.9 Construction - multi-family 44,266 3.9 34,476 3.0 Construction - land development 2,238 0.2 7,712 0.7 Land 19,041 1.7 25,571 2.3 Total mortgage loans 902,064 79.1 902,274 79.6 Consumer loans: Home equity and second mortgage 32,026 2.8 32,077 2.8 Other 2,756 0.2 3,572 0.3 Total consumer loans 34,782 3.0 35,649 3.1 Commercial loans: Commercial business 66,645 5.8 69,540 6.1 U.S. Small Business Administration ("SBA") Paycheck Protection Program ("PPP") loans 138,175 12.1 126,820 11.2 Total commercial loans 204,820 17.9 % 196,360 17.3 Total loans receivable 1,141,666 100.0 % 1,134,283 100.0 % Less: Undisbursed portion of construction 90,550 100,558 Deferred loan origination fees, net 6,999 6,436 Allowance for loan losses 13,434 13,414 Subtotal 110,983 120,408 Loans receivable, net $ 1,030,683 $ 1,013,875 _____________________________ (1) Does not include one- to four-family loans held for sale totaling $8,455 and $4,509 at March 31, 2021 and September 30, 2020, respectively. Loans receivable at March 31, 2021 and September 30, 2020 are reported net of unamortized discounts totaling $583,000 and $790,000, respectively. Allowance for Loan Losses The following tables set forth information for the three and six months ended March 31, 2021 and 2020 regarding activity in the allowance for loan losses by portfolio segment (dollars in thousands): Three Months Ended March 31, 2021 Beginning Provision for Charge- Recoveries Ending Mortgage loans: One- to four-family $ 1,135 $ 16 $ — $ — $ 1,151 Multi-family 757 27 — — 784 Commercial 7,136 102 — — 7,238 Construction – custom and owner/builder 770 (75) — — 695 Construction – speculative one- to four-family 182 (34) — — 148 Construction – commercial 558 156 — — 714 Construction – multi-family 186 137 — — 323 Construction – land development 123 (104) — — 19 Land 474 (72) — 5 407 Consumer loans: Home equity and second mortgage 605 (53) — — 552 Other 57 — (1) — 56 Commercial business loans 1,449 (100) (2) — 1,347 SBA PPP loans — — — — — Total $ 13,432 $ — $ (3) $ 5 $ 13,434 Six Months Ended March 31, 2021 Beginning Provision for Charge- Recoveries Ending Mortgage loans: One-to four-family $ 1,163 $ (12) $ — $ — $ 1,151 Multi-family 718 66 — — 784 Commercial 7,144 94 — — 7,238 Construction – custom and owner/builder 832 (137) — — 695 Construction – speculative one- to four-family 158 (10) — — 148 Construction – commercial 420 294 — — 714 Construction – multi-family 238 85 — — 323 Construction – land development 133 (114) — — 19 Land 572 (175) — 10 407 Consumer loans: Home equity and second mortgage 593 (41) — — 552 Other 71 (18) (1) 4 56 Commercial business loans 1,372 (32) (2) 9 1,347 SBA PPP loans — — — — — Total $ 13,414 $ — $ (3) $ 23 $ 13,434 Three Months Ended March 31, 2020 Beginning Provision for Charge- Recoveries Ending Mortgage loans: One- to four-family $ 1,065 $ 83 $ — $ 1 $ 1,149 Multi-family 499 96 — — 595 Commercial 4,410 1,351 — 1 5,762 Construction – custom and owner/builder 754 (57) — — 697 Construction – speculative one- to four-family 248 (44) — — 204 Construction – commercial 403 20 — — 423 Construction – multi-family 333 61 — — 394 Construction – land development 48 32 — — 80 Land 654 19 — 5 678 Consumer loans: Home equity and second mortgage 609 47 — — 656 Other 87 (10) (1) 2 78 Commercial business loans 772 402 — — 1,174 Total $ 9,882 $ 2,000 $ (1) $ 9 $ 11,890 Six Months Ended March 31, 2020 Beginning Provision for Charge- Recoveries Ending Mortgage loans: One-to four-family $ 1,167 $ (21) $ — $ 3 $ 1,149 Multi-family 481 114 — — 595 Commercial 4,154 1,603 — 5 5,762 Construction – custom and owner/builder 755 (63) — 5 697 Construction – speculative one- to four-family 212 (8) — — 204 Construction – commercial 338 85 — — 423 Construction – multi-family 375 19 — — 394 Construction – land development 67 13 — — 80 Land 697 (29) — 10 678 Consumer loans: Home equity and second mortgage 623 33 — — 656 Other 99 (13) (11) 3 78 Commercial business loans 722 467 (15) — 1,174 Total $ 9,690 $ 2,200 $ (26) $ 26 $ 11,890 The following tables present information on the loans evaluated individually and collectively for impairment in the allowance for loan losses by portfolio segment at March 31, 2021 and September 30, 2020 (dollars in thousands): Allowance for Loan Losses Recorded Investment in Loans Individually Collectively Total Individually Collectively Total March 31, 2021 Mortgage loans: One- to four-family $ — $ 1,151 $ 1,151 $ 896 $ 116,288 $ 117,184 Multi-family — 784 784 — 92,435 92,435 Commercial — 7,238 7,238 3,028 458,938 461,966 Construction – custom and owner/builder — 695 695 — 62,973 62,973 Construction – speculative one- to four-family — 148 148 — 7,336 7,336 Construction – commercial — 714 714 — 34,217 34,217 Construction – multi-family — 323 323 — 15,739 15,739 Construction – land development — 19 19 — 623 623 Land — 407 407 173 18,868 19,041 Consumer loans: Home equity and second mortgage — 552 552 537 31,489 32,026 Other — 56 56 8 2,748 2,756 Commercial business loans 73 1,274 1,347 527 66,118 66,645 SBA PPP loans — — — — 138,175 138,175 Total $ 73 $ 13,361 $ 13,434 $ 5,169 $ 1,045,947 $ 1,051,116 September 30, 2020 Mortgage loans: One- to four-family $ 3 $ 1,160 $ 1,163 $ 1,143 $ 117,437 $ 118,580 Multi-family — 718 718 — 85,053 85,053 Commercial — 7,144 7,144 3,242 450,332 453,574 Construction – custom and owner/builder — 832 832 — 75,332 75,332 Construction – speculative one- to four-family — 158 158 — 7,108 7,108 Construction – commercial — 420 420 — 20,927 20,927 Construction – multi-family — 238 238 — 10,832 10,832 Construction – land development — 133 133 — 4,739 4,739 Land — 572 572 394 25,177 25,571 Consumer loans: Home equity and second mortgage — 593 593 555 31,522 32,077 Other — 71 71 9 3,563 3,572 Commercial business loans 38 1,334 1,372 430 69,110 69,540 SBA PPP loans — — — — 126,820 126,820 Total $ 41 $ 13,373 $ 13,414 $ 5,773 $ 1,027,952 $ 1,033,725 The following tables present an analysis of loans by aging category and portfolio segment at March 31, 2021 and September 30, 2020 (dollars in thousands): 30–59 60-89 Non- Past Due Total Current Total March 31, 2021 Mortgage loans: One- to four-family $ — $ — $ 415 $ — $ 415 $ 116,769 $ 117,184 Multi-family — — — — — 92,435 92,435 Commercial 514 — 643 — 1,157 460,809 461,966 Construction – custom and owner/builder 808 — — — 808 62,165 62,973 Construction – speculative one- to four-family — — — — — 7,336 7,336 Construction – commercial — — — — — 34,217 34,217 Construction – multi-family — — — — — 15,739 15,739 Construction – land development — — — — — 623 623 Land 217 — 173 — 390 18,651 19,041 Consumer loans: Home equity and second mortgage — 73 539 — 612 31,414 32,026 Other 11 — 8 — 19 2,737 2,756 Commercial business loans — — 527 — 527 66,118 66,645 SBA PPP loans — — — — — 138,175 138,175 Total $ 1,550 $ 73 $ 2,305 $ — $ 3,928 $ 1,047,188 $ 1,051,116 September 30, 2020 Mortgage loans: One- to four-family $ — $ 68 $ 659 $ — $ 727 $ 117,853 $ 118,580 Multi-family — — — — — 85,053 85,053 Commercial — 519 858 — 1,377 452,197 453,574 Construction – custom and owner/builder — — — — — 75,332 75,332 Construction – speculative one- to four-family — — — — — 7,108 7,108 Construction – commercial — — — — — 20,927 20,927 Construction – multi-family — — — — — 10,832 10,832 Construction – land development — 38 — — 38 4,701 4,739 Land — 144 394 — 538 25,033 25,571 Consumer loans: Home equity and second mortgage — 22 555 — 577 31,500 32,077 Other 3 — 9 — 12 3,560 3,572 Commercial business loans 49 430 479 69,061 69,540 SBA PPP loans — — — — — 126,820 126,820 Total $ 52 $ 791 $ 2,905 $ — $ 3,748 $ 1,029,977 $ 1,033,725 ______________________ (1) Includes non-accrual loans past due 90 days or more and other loans classified as non-accrual. Credit Quality Indicators The Company uses credit risk grades which reflect the Company’s assessment of a loan’s risk or loss potential. The Company categorizes loans into risk grade categories based on relevant information about the ability of borrowers to service their debt such as: current financial information, historical payment experience, credit documentation, public information and current economic trends, among other factors such as the estimated fair value of the collateral. The Company uses the following definitions for credit risk ratings as part of the on-going monitoring of the credit quality of its loan portfolio: Pass: Pass loans are defined as those loans that meet acceptable quality underwriting standards. Watch: Watch loans are defined as those loans that still exhibit acceptable quality, but have some concerns that justify greater attention. If these concerns are not corrected, a potential for further adverse categorization exists. These concerns could relate to a specific condition peculiar to the borrower, its industry segment or the general economic environment. Special Mention: Special mention loans are defined as those loans deemed by management to have some potential weaknesses that deserve management’s close attention. If left uncorrected, these potential weaknesses may result in the deterioration of the payment prospects of the loan. Substandard: Substandard loans are defined as those loans that are inadequately protected by the current net worth and paying capacity of the obligor, or of the collateral pledged. Loans classified as substandard have a well-defined weakness or weaknesses that jeopardize the repayment of the debt. If the weakness or weaknesses are not corrected, there is the distinct possibility that some loss will be sustained. Doubtful: Loans in this classification have the weaknesses of substandard loans with the additional characteristic that the weaknesses make the collection or liquidation in full on the basis of currently existing facts, conditions and values questionable, and there is a high possibility of loss. At both March 31, 2021 and September 30, 2020, there were no loans classified as doubtful. Loss: Loans in this classification are considered uncollectible and of such little value that continuance as bankable assets is not warranted. This classification does not mean that the loan has absolutely no recovery or salvage value, but rather it is not practical or desirable to defer writing off this loan even though partial recovery may be realized in the future. At both March 31, 2021 and September 30, 2020, there were no loans classified as loss. The following tables present an analysis of loans by credit quality indicator and portfolio segment at March 31, 2021 and September 30, 2020 (dollars in thousands): Loan Grades March 31, 2021 Pass Watch Special Substandard Total Mortgage loans: One- to four-family $ 115,603 $ 615 $ 544 $ 422 $ 117,184 Multi-family 92,435 — — — 92,435 Commercial 439,977 13,290 7,600 1,099 461,966 Construction – custom and owner/builder 62,165 808 — — 62,973 Construction – speculative one- to four-family 7,336 — — — 7,336 Construction – commercial 32,700 — 1,517 — 34,217 Construction – multi-family 15,739 — — — 15,739 Construction – land development 583 — — 40 623 Land 17,727 575 566 173 19,041 Consumer loans: Home equity and second mortgage 31,331 36 — 659 32,026 Other 2,717 31 — 8 2,756 Commercial business loans 66,030 — 45 570 66,645 SBA PPP loans 138,175 — — — 138,175 Total $ 1,022,518 $ 15,355 $ 10,272 $ 2,971 $ 1,051,116 September 30, 2020 Mortgage loans: One- to four-family $ 115,992 $ 1,369 $ 551 $ 668 $ 118,580 Multi-family 85,053 — — — 85,053 Commercial 441,037 7,712 3,447 1,378 453,574 Construction – custom and owner/builder 74,529 803 — — 75,332 Construction – speculative one- to four-family 7,108 — — — 7,108 Construction – commercial 19,525 — 1,402 — 20,927 Construction – multi-family 10,832 — — — 10,832 Construction – land development 4,701 — — 38 4,739 Land 23,290 1,518 370 393 25,571 Consumer loans: Home equity and second mortgage 31,344 53 — 680 32,077 Other 3,531 32 — 9 3,572 Commercial business loans 68,904 59 94 483 69,540 SBA PPP loans 126,820 — — — 126,820 Total $ 1,012,666 $ 11,546 $ 5,864 $ 3,649 $ 1,033,725 Impaired Loans A loan is considered impaired when it is probable that the Company will be unable to collect all amounts (principal and interest) when due according to the contractual terms of the loan agreement. Smaller balance homogeneous loans, such as residential mortgage loans and consumer loans, may be collectively evaluated for impairment. When a loan has been identified as being impaired, the amount of the impairment is measured by using discounted cash flows, except when, as an alternative, the current estimated fair value of the collateral (reduced by estimated costs to sell, if applicable) or observable market price is used. The valuation of real estate collateral is subjective in nature and may be adjusted in future periods because of changes in economic conditions. Management considers third-party appraisals, as well as independent fair market value assessments from realtors or persons involved in selling real estate, in determining the estimated fair value of particular properties. In addition, as certain of these third-party appraisals and independent fair market value assessments are only updated periodically, changes in the values of specific properties may have occurred subsequent to the most recent appraisals. Accordingly, the amounts of any such potential changes and any related adjustments are generally recorded at the time that such information is received. When the estimated net realizable value of the impaired loan is less than the recorded investment in the loan (including accrued interest and net deferred loan origination fees or costs), impairment is recognized by creating or adjusting an allocation of the allowance for loan losses, and uncollected accrued interest is reversed against interest income. If ultimate collection of principal is in doubt, all cash receipts on impaired loans are applied to reduce the principal balance. The categories of non-accrual loans and impaired loans overlap, although they are not identical. The following table is a summary of information related to impaired loans by portfolio segment as of March 31, 2021 and for the three and six months then ended (dollars in thousands): Recorded Unpaid Principal Balance (Loan Balance Plus Charge Off) Related Quarter to Date ("QTD") Average Recorded Investment (1) Year to Date ("YTD") Average Recorded Investment (2) QTD Interest Income Recognized (1) YTD Interest Income Recognized (2) QTD Cash Basis Interest Income Recognized (1) YTD Cash Basis Interest Income Recognized (2) With no related allowance recorded: Mortgage loans: One- to four-family $ 895 $ 938 $ — $ 899 $ 819 $ 19 $ 41 $ 16 $ 36 Commercial 3,028 3,028 — 3,028 3,099 40 80 33 63 Land 173 208 — 289 324 1 1 1 1 Consumer loans: Home equity and second mortgage 538 538 — 573 567 1 1 1 1 Other 8 8 — 9 9 — — — — Commercial business loans 233 236 — 218 206 — — — — Subtotal 4,875 4,956 — 5,016 5,024 61 123 51 101 With an allowance recorded: Mortgage loans: One- to four-family — — — — 161 — — — — Commercial business loans 294 294 73 295 279 — — — — Subtotal 294 294 73 295 440 — — — — Total: Mortgage loans: One- to four-family 895 938 — 899 980 19 41 16 36 Commercial 3,028 3,028 — 3,028 3,099 40 80 33 63 Land 173 208 — 289 324 1 1 1 1 Consumer loans: Home equity and second mortgage 538 538 — 573 567 1 1 1 1 Other 8 8 — 9 9 — — — — Commercial business loans 527 530 73 513 485 — — — — Total $ 5,169 $ 5,250 $ 73 $ 5,311 $ 5,464 $ 61 $ 123 $ 51 $ 101 ______________________________________________ (1) For the three months ended March 31, 2021. (2) For the six months ended March 31, 2021. Recorded Unpaid Principal Balance (Loan Balance Plus Charge Off) Related YTD YTD Interest YTD Cash Basis Interest Income Recognized (1) With no related allowance recorded: Mortgage loans: One- to four-family $ 659 $ 703 $ — $ 1,127 $ 44 $ 34 Commercial 3,242 3,242 — 3,236 133 107 Land 394 438 — 125 — — Consumer loans: Home equity and second mortgage 555 555 — 581 — — Other 9 9 — 6 — — Commercial business loans 182 182 — 176 — — Subtotal 5,041 5,129 — 5,251 177 141 With an allowance recorded: Mortgage loans: One- to four-family 484 484 3 194 16 8 Land — — — 110 — — Consumer loans: Other — — — 7 — — Commercial business loans 248 248 38 370 — — Subtotal 732 732 41 681 16 8 Total Mortgage loans: One- to four-family 1,143 1,187 3 1,321 60 42 Commercial 3,242 3,242 — 3,236 133 107 Land 394 438 — 235 — — Consumer loans: Home equity and second mortgage 555 555 — 581 — — Other 9 9 — 13 — — Commercial business loans 430 430 38 546 — — Total $ 5,773 $ 5,861 $ 41 $ 5,932 $ 193 $ 149 _____________________________________________ (1) For the year ended September 30, 2020. A troubled debt restructured loan ("TDR") is a loan for which the Company, for reasons related to a borrower’s financial difficulties, grants a concession to the borrower that the Company would not otherwise consider. Examples of such concessions include, but are not limited to: a reduction in the stated interest rate; an extension of the maturity at an interest rate below current market rates; a reduction in the face amount of the debt; a reduction in the accrued interest; or re-amortizations, extensions, deferrals and renewals. TDRs are considered impaired and are individually evaluated for impairment. TDRs are classified as non-accrual (and considered to be non-performing) unless they have been performing in accordance with modified terms for a period of at least six months. The Company had $3.06 million and $3.07 million in TDRs included in impaired loans at March 31, 2021 and September 30, 2020, respectively, and had no commitments at these dates to lend additional funds on these loans. There was no allowance for loan losses allocated to TDRs at March 31, 2021, and, at September 30, 2020, there was $3,000 in allowance for loan losses allocated to TDRs. There were no TDRs for which there was a payment default within the first 12 months of the modification during the six months ended March 31, 2021. The Coronavirus Aid, Relief, and Economic Security Act of 2020 signed into law on March 27, 2020 ("CARES Act") provided guidance around the modification of loans as a result of the COVID-19 pandemic, which outlined, among other criteria, that short-term modifications made on a good faith basis to borrowers who were current as defined under the CARES Act prior to any relief, are not TDRs. This includes short-term (e.g., six months) modifications such as payment deferrals, fee waivers, extensions of repayment terms, or other delays in payment that are insignificant. Borrowers are considered current under the CARES Act and related regulatory guidance if they are less than 30 days past due on their contractual payments at the time a modification program is implemented. On December 27, 2020, the Consolidated Appropriations Act, 2021 ("CAA 2021") was signed into law. Among other purposes, this act provides coronavirus emergency response and relief, including extending relief offered under the CARES Act related to restructured loans as a result of COVID-19 through January 1, 2022 or 60 days after the end of the the national emergency declared by the President, whichever is earlier. In response to requests from borrowers, the Company made payment deferral modifications (typically 90-day payment deferrals with interest continuing to accrue or scheduled to be paid monthly) on a number of loans. The majority of these borrowers had resumed making payments as of March 31, 2021, and as of that date, only eight loans totaling $12.88 million remained on deferral status under COVID-19 loan modification forbearance agreements. Loan modifications in accordance with the CARES Act and related regulatory guidance are still subject to an evaluation in regard to determining whether or not a loan is deemed to be impaired. See Note 10 - Recent Accounting Pronouncements. The following tables set forth information with respect to total COVID-19 loan modifications, on deferral status, as of March 31, 2021 and September 30, 2020 (dollars in thousands): COVID-19 Loan Modifications March 31, 2021 Mortgage loans Count Balance Percent Commercial 4 $ 11,174 86.7 % Construction 1 1,517 11.8 Total mortgage loans 5 12,691 98.5 Consumer loans Home equity and second mortgage 1 18 0.1 Total consumer loans 1 18 0.1 Commercial loans 2 175 1.4 Total COVID-19 Modifications 8 $ 12,884 100.0 % COVID-19 Loan Modifications September 30, 2020 Mortgage loans Number Balance Percent One- to four-family 1 $ 467 8.0 % Commercial 2 3,951 67.2 Construction 1 1,402 23.9 Total mortgage loans 4 5,820 99.1 Consumer loans Home equity and second mortgage 1 50 0.9 Total consumer loans 1 50 0.9 Total COVID-19 Modifications 5 $ 5,870 100.0 % The following tables set forth information with respect to the Company’s TDRs by interest accrual status as of March 31, 2021 and September 30, 2020 (dollars in thousands): March 31, 2021 Accruing Non- Total Mortgage loans: One- to four-family $ 479 $ — $ 479 Commercial 2,385 — 2,385 Land — 124 124 Consumer loans: Home equity and second mortgage — 68 68 Total $ 2,864 $ 192 $ 3,056 September 30, 2020 Accruing Non- Total Mortgage loans: One- to four-family $ 483 $ — $ 483 Commercial 2,385 — 2,385 Land — 130 130 Consumer loans: Home equity and second mortgage — 73 73 Total $ 2,868 $ 203 $ 3,071 There were no new TDRs during the six months ended March 31, 2021 or during the year ended September 30, 2020.

Leases

Leases	6 Months Ended
	Mar. 31, 2021
Leases [Abstract]
Leases	LEASES The Company adopted Financial Accounting Standard Board ("FASB") Accounting Standards Codification ("ASC") 842, Leases ("ASC 842") on October 1, 2019 and began recording operating lease liabilities and operating lease ROU assets on the consolidated balance sheets. The Company has operating leases for three retail bank branch offices. The ROU assets totaled $2.89 million at October 1, 2019. The Company's leases have remaining lease terms of nineteen months to eleven years, some of which include options to extend the leases for up to five years. The components of lease cost (included in the premises and equipment expense category in the consolidated statements of income) are as follows for the three and six months ended March 31, 2021 and 2020 (dollars in thousands): Three Months Ended March 31, 2021 Six Months Ended March 31, 2021 Lease cost: Operating lease cost $ 92 $ 185 Short-term lease cost — — Total lease cost $ 92 $ 185 Three Months Ended March 31, 2020 Six Months Ended March 31, 2020 Lease cost: Operating lease cost $ 83 $ 166 Short-term lease cost — — Total lease cost $ 83 $ 166 The following table provides supplemental information to operating leases for the three and six months ended March 31, 2021 and 2020 (dollars in thousands): At or For Three Months Ended March 31, 2021 At or For Six Months Ended March 31, 2021 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 80 $ 160 Weighted average remaining lease term-operating leases 8.8 years 8.8 years Weighted average discount rate-operating leases 2.23 % 2.23 % At or For Three Months Ended March 31, 2020 At or For Six Months Ended March 31, 2020 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 80 $ 158 Weighted average remaining lease term-operating leases 9.7 years 9.7 years Weighted average discount rate-operating leases 2.22 % 2.22 % The Company's leases typically do not contain a discount rate implicit in the lease contracts. As an alternative, the weighted average discount rate used to value the future value of lease payments due in calculating the value of the ROU asset and lease liability was determined by utilizing the September 30, 2019 fixed-rate advances issued by the FHLB, for all leases entered into prior to the October 1, 2019 adoption date. Maturities of operating lease liabilities at March 31, 2021 for future fiscal years are as follows (dollars in thousands): Remainder of 2021 $ 167 2022 342 2023 310 2024 313 2025 317 Thereafter 1,322 Total lease payments 2,771 Less imputed interest 272 Total $ 2,499

Net Income Per Common Share

Net Income Per Common Share	6 Months Ended
	Mar. 31, 2021
Earnings Per Share [Abstract]
Net Income Per Common Share	NET INCOME PER COMMON SHARE Basic net income per common share is computed by dividing net income to common shareholders by the weighted average number of common shares outstanding during the period without considering any dilutive items. Diluted net income per common share is computed by dividing net income to common shareholders by the weighted average number of common shares and common stock equivalents for items that are dilutive, net of shares assumed to be repurchased using the treasury stock method at the average share price for the Company’s common stock during the period. Common stock equivalents arise from the assumed conversion of outstanding stock options to purchase common stock. Information regarding the calculation of basic and diluted net income per common share for the three and six months ended March 31, 2021 and 2020 is as follows (dollars in thousands, except per share amounts): Three Months Ended March 31, Six Months Ended March 31, 2021 2020 2021 2020 Basic net income per common share computation Numerator – net income $ 7,251 $ 5,049 $ 14,541 $ 11,701 Denominator – weighted average common shares outstanding 8,331,121 8,344,201 8,322,210 8,342,828 Basic net income per common share $ 0.87 $ 0.61 $ 1.75 $ 1.40 Diluted net income per common share computation Numerator – net income $ 7,251 $ 5,049 $ 14,541 $ 11,701 Denominator – weighted average common shares outstanding 8,331,121 8,344,201 8,322,210 8,342,828 Effect of dilutive stock options (1) 113,677 112,458 106,385 123,066 Weighted average common shares outstanding - assuming dilution 8,444,798 8,456,659 8,428,595 8,465,894 Diluted net income per common share $ 0.86 $ 0.60 $ 1.73 $ 1.38 ____________________________________________ (1) For the three and six months ended March 31, 2021, average options to purchase 135,590 and 136,631 shares of common stock, respectively, were outstanding but not included in the computation of diluted net income per share, because their effect would have been anti-dilutive. For the three and six months ended March 31, 2020, average options to purchase 138,362 and 121,497 shares of common stock, respectively, were outstanding but not included in the computation of diluted net income per shares, because their effect would have been anti-dilutive.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	6 Months Ended
	Mar. 31, 2021
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss)	ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) The changes in accumulated other comprehensive income (loss) ("AOCI") by component during the three and six months ended March 31, 2021 and 2020 are as follows (dollars in thousands): Three Months Ended March 31, 2021 Changes in fair value of available for sale securities (1) Changes in OTTI on held to maturity securities (1) Total (1) Balance of AOCI at the beginning of period $ 70 $ (26) $ 44 Other comprehensive income (loss) 74 3 77 Balance of AOCI at the end of period $ 144 $ (23) $ 121 Six Months Ended March 31, 2021 Changes in fair value of available for sale securities (1) Changes in OTTI on held to maturity securities (1) Total (1) Balance of AOCI at the beginning of period $ 87 $ (26) $ 61 Other comprehensive income (loss) 57 3 60 Balance of AOCI at the end of period $ 144 $ (23) $ 121 Three Months Ended March 31, 2020 Changes in fair value of available for sale securities (1) Changes in OTTI on held to maturity securities (1) Total (1) Balance of AOCI at the beginning of period $ (116) $ (30) $ (146) Other comprehensive (loss) income (35) 2 (33) Balance of AOCI at the end of period $ (151) $ (28) $ (179) Six Months Ended March 31, 2020 Changes in fair value of available for sale securities (1) Changes in OTTI on held to maturity securities (1) Total (1) Balance of AOCI at the beginning of period $ 90 $ (40) $ 50 Other comprehensive (loss) income (241) 12 (229) Balance of AOCI at the end of period $ (151) $ (28) $ (179) __________________________ (1) All amounts are net of income taxes.

Stock Compensation Plans

Stock Compensation Plans	6 Months Ended
	Mar. 31, 2021
Share-based Payment Arrangement, Noncash Expense [Abstract]
Stock Compensation Plans	STOCK COMPENSATION PLANS Under the Company’s 2003 Stock Option Plan, the Company was able to grant options for up to 300,000 shares of common stock to employees, officers, directors and directors emeriti. Under the Company's 2014 Equity Incentive Plan, the Company is able to grant options and awards of restricted stock (with or without performance measures) for up to 352,366 shares of common stock to employees, officers, directors and directors emeriti. Under the Company's 2019 Equity Incentive Plan, which was approved by shareholders on January 28, 2020, the Company is able to grant options and awards or restricted stock (with or without performance measures) for up to 350,000 shares of common stock, of which 300,000 shares are reserved to be awarded to employees, including officers, and 50,000 shares are reserved to be awarded to directors and directors emeriti. Shares issued may be purchased in the open market or may be issued from authorized and unissued shares. The exercise price of each option equals the fair market value of the Company’s common stock on the date of grant. Generally, options and restricted stock vest in 20% annual installments on each of the five At both March 31, 2021 and 2020, there were no unvested restricted stock awards. There were no restricted stock grants awarded during the six months ended March 31, 2021 and 2020. Stock option activity for the six months ended March 31, 2021 and 2020 is summarized as follows: Six Months Ended March 31, 2021 Six Months Ended March 31, 2020 Number of Shares Weighted Number of Shares Weighted Options outstanding, beginning of period 395,349 $ 18.45 378,304 $ 18.15 Exercised (53,564) 9.70 (36,375) 10.30 Granted 1,500 19.13 1,000 26.50 Forfeited (4,520) 27.57 (8,650) 24.84 Options outstanding, end of period 338,765 $ 19.71 334,279 $ 18.86 The fair value of stock options is determined using the Black-Scholes valuation model. The weighted average assumptions for options granted during the six months ended March 31, 2021 were as follows: Expected volatility 33 % Expected life (in years) 5 Expected dividend yield 4.76 % Risk free interest rate 0.38 % Grant date fair value per share $ 3.26 The aggregate intrinsic value of options exercised during the six months ended March 31, 2021 and 2020 was $947,000 and $628,000, respectively. At March 31, 2021, there were 158,392 unvested options with an aggregate grant date fair value of $565,000, all of which the Company assumes will vest. The aggregate intrinsic value of unvested options at March 31, 2021 was $897,000. There were 200 options vested during the six months ended March 31, 2021 with a total fair value of $1,000. At March 31, 2020, there were 154,670 unvested options with an aggregate grant date fair value of $584,000. There were no options that vested during the six months ended March 31, 2020. Additional information regarding options outstanding at March 31, 2021 is as follows: Options Outstanding Options Exercisable Range of Number Weighted Weighted Number Weighted Weighted $5.86 - 6.00 4,200 $ 5.93 1.5 4,200 $ 5.93 1.5 9.00 30,000 9.00 2.6 30,000 9.00 2.6 10.26 - 10.71 65,575 10.57 4.0 65,575 10.57 4.0 15.67 - 19.13 104,500 16.50 8.2 25,400 15.67 5.5 26.50 - 27.14 43,990 27.13 8.5 8,798 27.13 8.5 29.69 50,400 29.69 6.5 30,300 29.69 6.5 31.80 40,100 31.80 7.5 16,100 31.80 7.5 338,765 $ 19.71 6.5 180,373 $ 16.83 4.9 The aggregate intrinsic value of options outstanding at March 31, 2021 and 2020 was $2.99 million and $1.41 million , respectively. As of March 31, 2021, unrecognized compensation cost related to unvested stock options was $507,000, which is expected to be recognized over a weighted average life of 2.12 years.

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Mar. 31, 2021
Fair Value Disclosures [Abstract]
Fair Value Measurements	FAIR VALUE MEASUREMENTS Fair value is defined under GAAP as the exchange price that would be received for an asset or paid to transfer a liability (exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. GAAP requires that valuation techniques maximize the use of observable inputs and minimize the use of unobservable inputs. GAAP also establishes a fair value hierarchy which prioritizes the valuation inputs into three broad levels. Based on the underlying inputs, each fair value measurement in its entirety is reported in one of three levels. These levels are: Level 1: Quoted prices (unadjusted) in active markets for identical assets or liabilities that the reporting entity has the ability to access at the measurement date. Level 2: Significant observable inputs other than quoted prices included within Level 1, such as quoted prices for similar (as opposed to identical) assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in markets that are not active, and inputs other than quoted prices that are observable or can be corroborated by observable market data. Level 3: Significant unobservable inputs that reflect a company’s own assumptions about the assumptions that market participants would use in pricing an asset or liability based on the best information available in the circumstances. The Company's assets measured at fair value on a recurring basis consist of investment securities available for sale and investments in equity securities. The estimated fair values of MBS are based upon market prices of similar securities or observable inputs (Level 2). The estimated fair values of mutual funds are based upon quoted market prices (Level 1). The Company had no liabilities measured at fair value on a recurring basis at both March 31, 2021 and September 30, 2020. The Company's assets measured at estimated fair value on a recurring basis at March 31, 2021 and September 30, 2020 were as follows (dollars in thousands): March 31, 2021 Estimated Fair Value Level 1 Level 2 Level 3 Total Available for sale investment securities MBS: U.S. government agencies $ — $ 69,184 $ — $ 69,184 Investments in equity securities Mutual funds 957 — — 957 Total $ 957 $ 69,184 $ — $ 70,141 September 30, 2020 Estimated Fair Value Level 1 Level 2 Level 3 Total Available for sale investment securities MBS: U.S. government agencies $ — $ 57,907 $ — $ 57,907 Investments in equity securities Mutual funds 977 — — 977 Total $ 977 $ 57,907 $ — $ 58,884 There were no transfers among Level 1, Level 2 and Level 3 during the six months ended March 31, 2021 and the year ended September 30, 2020. The Company may be required, from time to time, to measure certain assets and liabilities at fair value on a non-recurring basis in accordance with GAAP. These include assets that are measured at the lower of cost or market value that were recognized at fair value below cost at the end of the period. The Company uses the following methods and significant assumptions to estimate fair value on a non-recurring basis: Impaired Loans : The estimated fair value of impaired loans is calculated using the collateral value method or on a discounted cash flow basis. The specific reserve for collateral dependent impaired loans is based on the estimated fair value of the collateral less estimated costs to sell, if applicable. In some cases, adjustments are made to the appraised values due to various factors including age of the appraisal, age of comparables included in the appraisal and known changes in the market and in the collateral. Such adjustments may be significant and typically result in a Level 3 classification of the inputs for determining fair value. Impaired loans are evaluated on a quarterly basis for additional impairment and adjusted accordingly. Investment Securities Held to Maturity: The estimated fair value of investment securities held to maturity is based upon the assumptions market participants would use in pricing the investment security. Such assumptions include quoted market prices (Level 1), market prices of similar securities or observable inputs (Level 2) and unobservable inputs such as dealer quotes, discounted cash flows or similar techniques (Level 3). OREO and Other Repossessed Assets, net: OREO and other repossessed assets are recorded at estimated fair value less estimated costs to sell. Estimated fair value is generally determined by management based on a number of factors, including third-party appraisals of estimated fair value in an orderly sale. Estimated costs to sell are based on standard market factors. The valuation of OREO and other repossessed assets is subject to significant external and internal judgment (Level 3). The following table summarizes the balances of assets measured at estimated fair value on a non-recurring basis at March 31, 2021 (dollars in thousands): Estimated Fair Value Level 1 Level 2 Level 3 Impaired loans: Commercial business loans $ — $ — $ 221 Total impaired loans — — 221 OREO and other repossessed assets — — 157 Total $ — $ — $ 378 The following table presents quantitative information about Level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis as of March 31, 2021 (dollars in thousands): Estimated Valuation Unobservable Input(s) Range Impaired loans $ 221 Market approach Appraised value less estimated selling costs NA OREO and other repossessed assets $ 157 Market approach Lower of appraised value or listing price less estimated selling costs NA The following table summarizes the balances of assets measured at estimated fair value on a non-recurring basis at September 30, 2020 (dollars in thousands): Estimated Fair Value Level 1 Level 2 Level 3 Impaired loans: Mortgage loans: One- to four-family $ — $ — $ 481 Commercial business loans — — 210 Total impaired loans — — 691 Investment securities – held to maturity: MBS - private label residential — 8 — OREO and other repossessed assets — — 1,050 Total $ — $ 8 $ 1,741 The following table presents quantitative information about Level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis as of September 30, 2020 (dollars in thousands): Estimated Valuation Unobservable Input(s) Range Impaired loans $ 691 Market approach Appraised value less estimated selling costs NA OREO and other repossessed assets $ 1,050 Market approach Lower of appraised value or listing price less estimated selling costs NA GAAP requires disclosure of estimated fair values for certain financial instruments. Such estimates are subjective in nature, and significant judgment is required regarding the risk characteristics of various financial instruments at a discrete point in time. Therefore, such estimates could vary significantly if assumptions regarding uncertain factors were to change. In addition, as the Company normally intends to hold the majority of its financial instruments until maturity, it does not expect to realize many of the estimated amounts disclosed. The disclosures also do not include estimated fair value amounts for certain items which are not defined as financial instruments but for which may have significant value. The Company does not believe that it would be practicable to estimate a representative fair value for these types of items as of March 31, 2021 and September 30, 2020. Because GAAP excludes certain items from fair value disclosure requirements, any aggregation of the fair value amounts presented would not represent the underlying value of the Company. Additionally, in accordance with GAAP, the Company uses the exit price notion in calculating the fair values of financial instruments not measured at fair value on a recurring basis. The recorded amounts and estimated fair values of financial instruments were as follows as of March 31, 2021 and September 30, 2020 (dollars in thousands): March 31, 2021 Fair Value Measurements Using: Recorded Estimated Fair Value Financial assets Cash and cash equivalents $ 433,342 $ 433,342 $ 433,342 $ — $ — CDs held for investment 39,674 39,674 39,674 — — Investment securities 105,649 107,022 8,953 97,572 497 Investments in equity securities 957 957 957 — — FHLB stock 2,303 2,303 2,303 — — Other investments 3,000 3,000 3,000 — — Loans held for sale 8,455 8,714 8,714 — — Loans receivable, net 1,030,683 1,040,302 — — 1,040,302 Accrued interest receivable 4,471 4,471 4,471 — — Financial liabilities Certificates of deposit 142,781 144,344 — — 144,344 FHLB borrowings 10,000 9,939 — — 9,939 Accrued interest payable 182 182 182 — — September 30, 2020 Fair Value Measurements Using: Recorded Estimated Fair Value Level 1 Level 2 Level 3 Financial assets Cash and cash equivalents $ 314,452 $ 314,452 $ 314,452 $ — $ — CDs held for investment 65,545 65,545 65,545 — — Investment securities 85,797 87,734 — 87,235 499 Investments in equity securities 977 977 977 — — FHLB stock 1,922 1,922 1,922 — — Other investments 3,000 3,000 3,000 — — Loans held for sale 4,509 4,664 4,664 — — Loans receivable, net 1,013,875 1,034,876 — — 1,034,876 Accrued interest receivable 4,484 4,484 4,484 — — Financial liabilities Certificates of deposit 158,524 160,921 — — 160,921 FHLB borrowings 10,000 10,167 — — 10,167 Accrued interest payable 274 274 274 — —

Revenue from Contracts with Cus

Revenue from Contracts with Customers Revenue from Contracts with Customers	6 Months Ended
	Mar. 31, 2021
Revenue from Contract with Customer [Abstract]
Revenue from Contracts with Customers	REVENUE FROM CONTRACTS WITH CUSTOMERS ASC 606 applies to all contracts with customers to provide goods or services in the ordinary course of business, except for contracts that are specifically excluded from its scope. The majority of the Company's revenues are composed of interest income, deferred loan fee accretion, premium/discount accretion, gains on sales of loans and investments, BOLI net earnings, servicing income on loans sold and other loan fee income, which are not within the scope of ASC 606. Revenue reported as service charges on deposits, ATM and debit card interchange transaction fees, merchant services fees, non-deposit investment fees and escrow fees are within the scope of ASC 606. All of the Company's revenue from contracts with customers within the scope of ASC 60 6 is recognized in non-interest income with the exception of gains on sales of OREO and gains on sales/disposition of premises and equipment, which are included in non-interest expense. For the three months ended March 31, 2021, the Company recognized $941,000 in service charges on deposits, $1.24 million in ATM and debit card interchange fees, $74,000 in escrow fees, and $3,000 in fee income from non-deposit investment sales, all considered within the scope of ASC 606. For the six months ended March 31, 2021, the Company recognized $2.00 million in service charges on deposits, $2.39 million in ATM and debit card interchange fees, $179,000 in escrow fees, and $7,000 in fee income from non-deposit investment sales, all considered within the scope of ASC 606. For the three months ended March 31, 2020, the Company recognized $1.08 million in service charges on deposits, $1.02 million in ATM and debit card interchange fees, $47,000 in escrow fees, and $7,000 in fee income from non-deposit investment sales, all considered within the scope of ASC 606. For the six months ended March 31, 2020, the Company recognized $2.28 million in service charges on deposits, $2.11 million in ATM and debit card interchange fees, $130,000 in escrow fees, and $13,000 in fee income from non-deposit investment sales, all considered within the scope of ASC 606. If a contract is determined to be within the scope of ASC 606, the Company recognizes revenue when it satisfies its performance obligation. Descriptions of the Company's revenue-generating activities that are within the scope of ASC 606 are as follows: • Service Charges on Deposits: The Company earns fees from its deposit customers from a variety of deposit products and services. Non-transaction based fees such as account maintenance fees and monthly statement fees are considered to be provided to the customer under a day-to-day contract with ongoing renewals. Revenue for these non-transaction fees are earned over the course of a month, representing the period over which the Company satisfies the performance obligation. Transaction-based fees such as non-sufficient fund charges, stop payment charges and wire fees are recognized at the time the transaction is executed, as the contract duration does not extend beyond the service performed. • ATM and Debit Card Interchange Transaction Fees: The Company earns fees from cardholder transactions conducted through third-party payment network providers which consist of interchange fees earned from the payment networks as a debit card issuer. These fees are recognized when the transaction occurs, but may settle on a daily or monthly basis. • Escrow Fees: The Company earns fees from real estate escrow contracts with customers. The Company receives and disburses money and/or property according to the customer's contract. Fees are recognized when the escrow contract closes. • Fee Income from Non-deposit Investment Sales: The Company earns fees from contracts with customers for investment activities. Revenues are generally recognized on a monthly basis and are generally based on a percentage of the customer's assets under management or based on investment solutions that are implemented for the customer.

Summary Of Significant Accoun_2

Summary Of Significant Accounting Policies (Policies)	6 Months Ended
	Mar. 31, 2021
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation:  The accompanying unaudited consolidated financial statements of Timberland Bancorp, Inc.and its wholly-owned subsidiary, Timberland Bank (the "Bank") (collectively, "the Company") were prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information and with instructions for Form 10-Q and, therefore, do not include all disclosures necessary for a complete presentation of consolidated financial condition, results of operations, and cash flows in conformity with GAAP. However, all adjustments which are, in the opinion of management, necessary for a fair presentation of the interim consolidated financial statements have been included.  All such adjustments are of a normal recurring nature. The unaudited consolidated financial statements should be read in conjunction with the audited consolidated financial statements included in the Company’s Annual Report on Form 10-K for the year ended September 30, 2020 (“2020 Form 10-K”).  The unaudited consolidated results of operations for the six months ended March 31, 2021 are not necessarily indicative of the results that may be expected for the entire fiscal year ending September 30, 2021.
Principles of Consolidation	Principles of Consolidation:  The unaudited consolidated financial statements include the accounts of the Company and the Bank, and the Bank’s wholly-owned subsidiary, Timberland Service Corporation.   All significant inter-company transactions and balances have been eliminated in consolidation.
Operating Segment	Operating Segment:  The Company has one reportable operating segment which is defined as community banking in western Washington.
Use of Estimates	The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect reported amounts of assets and liabilities, and the disclosure of contingent assets and liabilities, as of the date of the consolidated balance sheets, and the reported amounts of income and expenses during the reporting period.  Actual results could differ from those estimates.
Reclassification	Certain prior period amounts have been reclassified to conform to the March 31, 2021 presentation with no change to previously reported net income or total shareholders’ equity.
Revenue from Contract with Customer	ASC 606 applies to all contracts with customers to provide goods or services in the ordinary course of business, except for contracts that are specifically excluded from its scope. The majority of the Company's revenues are composed of interest income, deferred loan fee accretion, premium/discount accretion, gains on sales of loans and investments, BOLI net earnings, servicing income on loans sold and other loan fee income, which are not within the scope of ASC 606. Revenue reported as service charges on deposits, ATM and debit card interchange transaction fees, merchant services fees, non-deposit investment fees and escrow fees are within the scope of ASC 606. All of the Company's revenue from contracts with customers within the scope of ASC 60 6 is recognized in non-interest income with the exception of gains on sales of OREO and gains on sales/disposition of premises and equipment, which are included in non-interest expense. For the three months ended March 31, 2021, the Company recognized $941,000 in service charges on deposits, $1.24 million in ATM and debit card interchange fees, $74,000 in escrow fees, and $3,000 in fee income from non-deposit investment sales, all considered within the scope of ASC 606. For the six months ended March 31, 2021, the Company recognized $2.00 million in service charges on deposits, $2.39 million in ATM and debit card interchange fees, $179,000 in escrow fees, and $7,000 in fee income from non-deposit investment sales, all considered within the scope of ASC 606. For the three months ended March 31, 2020, the Company recognized $1.08 million in service charges on deposits, $1.02 million in ATM and debit card interchange fees, $47,000 in escrow fees, and $7,000 in fee income from non-deposit investment sales, all considered within the scope of ASC 606. For the six months ended March 31, 2020, the Company recognized $2.28 million in service charges on deposits, $2.11 million in ATM and debit card interchange fees, $130,000 in escrow fees, and $13,000 in fee income from non-deposit investment sales, all considered within the scope of ASC 606. If a contract is determined to be within the scope of ASC 606, the Company recognizes revenue when it satisfies its performance obligation. Descriptions of the Company's revenue-generating activities that are within the scope of ASC 606 are as follows: • Service Charges on Deposits: The Company earns fees from its deposit customers from a variety of deposit products and services. Non-transaction based fees such as account maintenance fees and monthly statement fees are considered to be provided to the customer under a day-to-day contract with ongoing renewals. Revenue for these non-transaction fees are earned over the course of a month, representing the period over which the Company satisfies the performance obligation. Transaction-based fees such as non-sufficient fund charges, stop payment charges and wire fees are recognized at the time the transaction is executed, as the contract duration does not extend beyond the service performed. • ATM and Debit Card Interchange Transaction Fees: The Company earns fees from cardholder transactions conducted through third-party payment network providers which consist of interchange fees earned from the payment networks as a debit card issuer. These fees are recognized when the transaction occurs, but may settle on a daily or monthly basis. • Escrow Fees: The Company earns fees from real estate escrow contracts with customers. The Company receives and disburses money and/or property according to the customer's contract. Fees are recognized when the escrow contract closes. • Fee Income from Non-deposit Investment Sales: The Company earns fees from contracts with customers for investment activities. Revenues are generally recognized on a monthly basis and are generally based on a percentage of the customer's assets under management or based on investment solutions that are implemented for the customer.

Investment Securities (Tables)

Investment Securities (Tables)	6 Months Ended
	Mar. 31, 2021
Investments [Abstract]
Marketable Securities	Held to maturity and available for sale investment securities have been classified according to management’s intent and were as follows as of March 31, 2021 and September 30, 2020 (dollars in thousands): Amortized Gross Gross Estimated March 31, 2021 Held to maturity Mortgage-backed securities ("MBS"): U.S. government agencies $ 21,888 $ 1,164 $ (9) $ 23,043 Private label residential 5,056 312 (23) 5,345 U.S. Treasury and U.S. government agency securities 9,021 — (68) 8,953 Bank issued trust preferred securities 500 — (3) 497 Total $ 36,465 $ 1,476 $ (103) $ 37,838 Available for sale MBS: U.S. government agencies $ 69,001 $ 282 $ (99) $ 69,184 Total $ 69,001 $ 282 $ (99) $ 69,184 September 30, 2020 Held to maturity MBS: U.S. government agencies $ 27,161 $ 1,635 $ (3) $ 28,793 Private label residential 229 307 (1) 535 Bank issued trust preferred securities 500 — (1) 499 Total $ 27,890 $ 1,942 $ (5) $ 29,827 Available for sale MBS: U.S. government agencies $ 57,797 $ 178 $ (68) $ 57,907 Total $ 57,797 $ 178 $ (68) $ 57,907
Unrealized Gain (Loss) on Investments	Held to maturity and available for sale investment securities with unrealized losses were as follows as of March 31, 2021 (dollars in thousands): Less Than 12 Months 12 Months or Longer Total Estimated Gross Quantity Estimated Gross Quantity Estimated Gross Held to maturity MBS: U.S. government agencies $ 2,098 $ (8) 3 $ 34 $ (1) 4 $ 2,132 $ (9) Private label residential 4,836 (23) 1 2 — 2 4,838 (23) U.S. Treasury and U.S. government agency securities 8,953 (68) 3 — — — 8,953 (68) Bank issued trust preferred securities 497 (3) 1 — — — 497 (3) Total $ 16,384 $ (102) 8 $ 36 $ (1) 6 $ 16,420 $ (103) Available for sale MBS: U.S. government agencies $ 22,873 $ (99) 12 $ — $ — — $ 22,873 $ (99) Total $ 22,873 $ (99) 12 $ — $ — — $ 22,873 $ (99) Held to maturity and available for sale investment securities with unrealized losses were as follows as of September 30, 2020 (dollars in thousands): Less Than 12 Months 12 Months or Longer Total Estimated Gross Quantity Estimated Gross Quantity Estimated Gross Held to maturity MBS: U.S. government agencies $ 5,130 $ (2) 4 $ 39 $ (1) 4 $ 5,169 $ (3) Private label residential 7 — 1 11 (1) 2 18 (1) Bank issued trust preferred securities 499 (1) 1 — — — 499 (1) Total $ 5,636 $ (3) 6 $ 50 $ (2) 6 $ 5,686 $ (5) Available for sale MBS: U.S. government agencies $ 21,464 $ (68) 11 $ — $ — — $ 21,464 $ (68) Total $ 21,464 $ (68) 11 $ — $ — — $ 21,464 $ (68)
Schedule of Significant Inputs Utilized to Measure Estimate of Credit Loss Component on OTTI Securities	The following table presents a summary of the significant inputs utilized to measure management’s estimates of the credit loss component on OTTI securities as of March 31, 2021 and 2020: Range Weighted Minimum Maximum Average March 31, 2021 Constant prepayment rate 6.00 % 15.00 % 13.18 % Collateral default rate 1.73 % 28.92 % 13.94 % Loss severity rate — % 18.93 % 5.79 % March 31, 2020 Constant prepayment rate 6.00 % 15.00 % 10.91 % Collateral default rate 1.86 % 22.47 % 10.44 % Loss severity rate — % 16.34 % 4.02 %
Other than Temporary Impairment, Credit Losses Recognized in Earnings	The following table presents the OTTI recoveries for the three and six months ended March 31, 2021 and 2020 (dollars in thousands): Three Months Ended Three Months Ended Held To Held To Total recoveries $ 3 $ 3 Adjustment for portion of OTTI transferred from other comprehensive income (loss) before income taxes (1) — — Net recoveries recognized in earnings (2) $ 3 $ 3 Six Months Ended Six Months Ended Held To Held To Total recoveries $ 8 $ 106 Adjustment for portion of OTTI transferred from other comprehensive income (loss) before income taxes (1) — — Net recoveries recognized in earnings (2) $ 8 $ 106 _________________ (1) Represents OTTI related to all other factors. (2) Represents OTTI related to credit losses. The following table presents a roll forward of the credit loss component of held to maturity and available for sale debt securities that have been written down for OTTI with the credit loss component recognized in earnings for the six months ended March 31, 2021 and 2020 (dollars in thousands): Six Months Ended 2021 2020 Beginning balance of credit loss $ 885 $ 1,071 Subtractions: Realized losses previously recorded as credit losses (5) (60) Recovery of prior credit loss (8) (106) Ending balance of credit loss $ 872 $ 905
Schedule of Contractual Maturities of Debt Securities	The contractual maturities of debt securities at March 31, 2021 were as follows (dollars in thousands). Expected maturities may differ from scheduled maturities due to the prepayment of principal or call provisions. Held to Maturity Available for Sale Amortized Estimated Amortized Estimated Due within one year $ — $ — $ 1,428 $ 1,421 Due after one year to five years 8,230 8,290 2,829 2,829 Due after five years to ten years 13,703 14,180 19,173 19,236 Due after ten years 14,532 15,368 45,571 45,698 Total $ 36,465 $ 37,838 $ 69,001 $ 69,184

Loans Receivable And Allowanc_2

Loans Receivable And Allowance For Loan Losses (Tables)	6 Months Ended
	Mar. 31, 2021
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
Schedule of Loans receivable and Loans held for sale	Loans receivable by portfolio segment consisted of the following at March 31, 2021 and September 30, 2020 (dollars in thousands): March 31, September 30, Amount Percent Amount Percent Mortgage loans: One- to four-family (1) $ 117,184 10.3 % $ 118,580 10.5 % Multi-family 92,435 8.1 85,053 7.5 Commercial 461,966 40.5 453,574 40.0 Construction - custom and owner/builder 105,305 9.2 129,572 11.4 Construction - speculative one- to four-family 17,289 1.5 14,592 1.3 Construction - commercial 42,340 3.7 33,144 2.9 Construction - multi-family 44,266 3.9 34,476 3.0 Construction - land development 2,238 0.2 7,712 0.7 Land 19,041 1.7 25,571 2.3 Total mortgage loans 902,064 79.1 902,274 79.6 Consumer loans: Home equity and second mortgage 32,026 2.8 32,077 2.8 Other 2,756 0.2 3,572 0.3 Total consumer loans 34,782 3.0 35,649 3.1 Commercial loans: Commercial business 66,645 5.8 69,540 6.1 U.S. Small Business Administration ("SBA") Paycheck Protection Program ("PPP") loans 138,175 12.1 126,820 11.2 Total commercial loans 204,820 17.9 % 196,360 17.3 Total loans receivable 1,141,666 100.0 % 1,134,283 100.0 % Less: Undisbursed portion of construction 90,550 100,558 Deferred loan origination fees, net 6,999 6,436 Allowance for loan losses 13,434 13,414 Subtotal 110,983 120,408 Loans receivable, net $ 1,030,683 $ 1,013,875 _____________________________ (1) Does not include one- to four-family loans held for sale totaling $8,455 and $4,509 at March 31, 2021 and September 30, 2020, respectively.
Schedule of Allowance for Loan Losses	The following tables set forth information for the three and six months ended March 31, 2021 and 2020 regarding activity in the allowance for loan losses by portfolio segment (dollars in thousands): Three Months Ended March 31, 2021 Beginning Provision for Charge- Recoveries Ending Mortgage loans: One- to four-family $ 1,135 $ 16 $ — $ — $ 1,151 Multi-family 757 27 — — 784 Commercial 7,136 102 — — 7,238 Construction – custom and owner/builder 770 (75) — — 695 Construction – speculative one- to four-family 182 (34) — — 148 Construction – commercial 558 156 — — 714 Construction – multi-family 186 137 — — 323 Construction – land development 123 (104) — — 19 Land 474 (72) — 5 407 Consumer loans: Home equity and second mortgage 605 (53) — — 552 Other 57 — (1) — 56 Commercial business loans 1,449 (100) (2) — 1,347 SBA PPP loans — — — — — Total $ 13,432 $ — $ (3) $ 5 $ 13,434 Six Months Ended March 31, 2021 Beginning Provision for Charge- Recoveries Ending Mortgage loans: One-to four-family $ 1,163 $ (12) $ — $ — $ 1,151 Multi-family 718 66 — — 784 Commercial 7,144 94 — — 7,238 Construction – custom and owner/builder 832 (137) — — 695 Construction – speculative one- to four-family 158 (10) — — 148 Construction – commercial 420 294 — — 714 Construction – multi-family 238 85 — — 323 Construction – land development 133 (114) — — 19 Land 572 (175) — 10 407 Consumer loans: Home equity and second mortgage 593 (41) — — 552 Other 71 (18) (1) 4 56 Commercial business loans 1,372 (32) (2) 9 1,347 SBA PPP loans — — — — — Total $ 13,414 $ — $ (3) $ 23 $ 13,434 Three Months Ended March 31, 2020 Beginning Provision for Charge- Recoveries Ending Mortgage loans: One- to four-family $ 1,065 $ 83 $ — $ 1 $ 1,149 Multi-family 499 96 — — 595 Commercial 4,410 1,351 — 1 5,762 Construction – custom and owner/builder 754 (57) — — 697 Construction – speculative one- to four-family 248 (44) — — 204 Construction – commercial 403 20 — — 423 Construction – multi-family 333 61 — — 394 Construction – land development 48 32 — — 80 Land 654 19 — 5 678 Consumer loans: Home equity and second mortgage 609 47 — — 656 Other 87 (10) (1) 2 78 Commercial business loans 772 402 — — 1,174 Total $ 9,882 $ 2,000 $ (1) $ 9 $ 11,890 Six Months Ended March 31, 2020 Beginning Provision for Charge- Recoveries Ending Mortgage loans: One-to four-family $ 1,167 $ (21) $ — $ 3 $ 1,149 Multi-family 481 114 — — 595 Commercial 4,154 1,603 — 5 5,762 Construction – custom and owner/builder 755 (63) — 5 697 Construction – speculative one- to four-family 212 (8) — — 204 Construction – commercial 338 85 — — 423 Construction – multi-family 375 19 — — 394 Construction – land development 67 13 — — 80 Land 697 (29) — 10 678 Consumer loans: Home equity and second mortgage 623 33 — — 656 Other 99 (13) (11) 3 78 Commercial business loans 722 467 (15) — 1,174 Total $ 9,690 $ 2,200 $ (26) $ 26 $ 11,890
Schedule of loans evaluated individually for impairment and collectively evaluated for impairment in the allowance for loan losses	The following tables present information on the loans evaluated individually and collectively for impairment in the allowance for loan losses by portfolio segment at March 31, 2021 and September 30, 2020 (dollars in thousands): Allowance for Loan Losses Recorded Investment in Loans Individually Collectively Total Individually Collectively Total March 31, 2021 Mortgage loans: One- to four-family $ — $ 1,151 $ 1,151 $ 896 $ 116,288 $ 117,184 Multi-family — 784 784 — 92,435 92,435 Commercial — 7,238 7,238 3,028 458,938 461,966 Construction – custom and owner/builder — 695 695 — 62,973 62,973 Construction – speculative one- to four-family — 148 148 — 7,336 7,336 Construction – commercial — 714 714 — 34,217 34,217 Construction – multi-family — 323 323 — 15,739 15,739 Construction – land development — 19 19 — 623 623 Land — 407 407 173 18,868 19,041 Consumer loans: Home equity and second mortgage — 552 552 537 31,489 32,026 Other — 56 56 8 2,748 2,756 Commercial business loans 73 1,274 1,347 527 66,118 66,645 SBA PPP loans — — — — 138,175 138,175 Total $ 73 $ 13,361 $ 13,434 $ 5,169 $ 1,045,947 $ 1,051,116 September 30, 2020 Mortgage loans: One- to four-family $ 3 $ 1,160 $ 1,163 $ 1,143 $ 117,437 $ 118,580 Multi-family — 718 718 — 85,053 85,053 Commercial — 7,144 7,144 3,242 450,332 453,574 Construction – custom and owner/builder — 832 832 — 75,332 75,332 Construction – speculative one- to four-family — 158 158 — 7,108 7,108 Construction – commercial — 420 420 — 20,927 20,927 Construction – multi-family — 238 238 — 10,832 10,832 Construction – land development — 133 133 — 4,739 4,739 Land — 572 572 394 25,177 25,571 Consumer loans: Home equity and second mortgage — 593 593 555 31,522 32,077 Other — 71 71 9 3,563 3,572 Commercial business loans 38 1,334 1,372 430 69,110 69,540 SBA PPP loans — — — — 126,820 126,820 Total $ 41 $ 13,373 $ 13,414 $ 5,773 $ 1,027,952 $ 1,033,725
Past Due Status of Loans Receivable	The following tables present an analysis of loans by aging category and portfolio segment at March 31, 2021 and September 30, 2020 (dollars in thousands): 30–59 60-89 Non- Past Due Total Current Total March 31, 2021 Mortgage loans: One- to four-family $ — $ — $ 415 $ — $ 415 $ 116,769 $ 117,184 Multi-family — — — — — 92,435 92,435 Commercial 514 — 643 — 1,157 460,809 461,966 Construction – custom and owner/builder 808 — — — 808 62,165 62,973 Construction – speculative one- to four-family — — — — — 7,336 7,336 Construction – commercial — — — — — 34,217 34,217 Construction – multi-family — — — — — 15,739 15,739 Construction – land development — — — — — 623 623 Land 217 — 173 — 390 18,651 19,041 Consumer loans: Home equity and second mortgage — 73 539 — 612 31,414 32,026 Other 11 — 8 — 19 2,737 2,756 Commercial business loans — — 527 — 527 66,118 66,645 SBA PPP loans — — — — — 138,175 138,175 Total $ 1,550 $ 73 $ 2,305 $ — $ 3,928 $ 1,047,188 $ 1,051,116 September 30, 2020 Mortgage loans: One- to four-family $ — $ 68 $ 659 $ — $ 727 $ 117,853 $ 118,580 Multi-family — — — — — 85,053 85,053 Commercial — 519 858 — 1,377 452,197 453,574 Construction – custom and owner/builder — — — — — 75,332 75,332 Construction – speculative one- to four-family — — — — — 7,108 7,108 Construction – commercial — — — — — 20,927 20,927 Construction – multi-family — — — — — 10,832 10,832 Construction – land development — 38 — — 38 4,701 4,739 Land — 144 394 — 538 25,033 25,571 Consumer loans: Home equity and second mortgage — 22 555 — 577 31,500 32,077 Other 3 — 9 — 12 3,560 3,572 Commercial business loans 49 430 479 69,061 69,540 SBA PPP loans — — — — — 126,820 126,820 Total $ 52 $ 791 $ 2,905 $ — $ 3,748 $ 1,029,977 $ 1,033,725 ______________________ (1) Includes non-accrual loans past due 90 days or more and other loans classified as non-accrual.
Financing Receivable Credit Quality Indicators	The following tables present an analysis of loans by credit quality indicator and portfolio segment at March 31, 2021 and September 30, 2020 (dollars in thousands): Loan Grades March 31, 2021 Pass Watch Special Substandard Total Mortgage loans: One- to four-family $ 115,603 $ 615 $ 544 $ 422 $ 117,184 Multi-family 92,435 — — — 92,435 Commercial 439,977 13,290 7,600 1,099 461,966 Construction – custom and owner/builder 62,165 808 — — 62,973 Construction – speculative one- to four-family 7,336 — — — 7,336 Construction – commercial 32,700 — 1,517 — 34,217 Construction – multi-family 15,739 — — — 15,739 Construction – land development 583 — — 40 623 Land 17,727 575 566 173 19,041 Consumer loans: Home equity and second mortgage 31,331 36 — 659 32,026 Other 2,717 31 — 8 2,756 Commercial business loans 66,030 — 45 570 66,645 SBA PPP loans 138,175 — — — 138,175 Total $ 1,022,518 $ 15,355 $ 10,272 $ 2,971 $ 1,051,116 September 30, 2020 Mortgage loans: One- to four-family $ 115,992 $ 1,369 $ 551 $ 668 $ 118,580 Multi-family 85,053 — — — 85,053 Commercial 441,037 7,712 3,447 1,378 453,574 Construction – custom and owner/builder 74,529 803 — — 75,332 Construction – speculative one- to four-family 7,108 — — — 7,108 Construction – commercial 19,525 — 1,402 — 20,927 Construction – multi-family 10,832 — — — 10,832 Construction – land development 4,701 — — 38 4,739 Land 23,290 1,518 370 393 25,571 Consumer loans: Home equity and second mortgage 31,344 53 — 680 32,077 Other 3,531 32 — 9 3,572 Commercial business loans 68,904 59 94 483 69,540 SBA PPP loans 126,820 — — — 126,820 Total $ 1,012,666 $ 11,546 $ 5,864 $ 3,649 $ 1,033,725
Impaired Loans Receivable	The following table is a summary of information related to impaired loans by portfolio segment as of March 31, 2021 and for the three and six months then ended (dollars in thousands): Recorded Unpaid Principal Balance (Loan Balance Plus Charge Off) Related Quarter to Date ("QTD") Average Recorded Investment (1) Year to Date ("YTD") Average Recorded Investment (2) QTD Interest Income Recognized (1) YTD Interest Income Recognized (2) QTD Cash Basis Interest Income Recognized (1) YTD Cash Basis Interest Income Recognized (2) With no related allowance recorded: Mortgage loans: One- to four-family $ 895 $ 938 $ — $ 899 $ 819 $ 19 $ 41 $ 16 $ 36 Commercial 3,028 3,028 — 3,028 3,099 40 80 33 63 Land 173 208 — 289 324 1 1 1 1 Consumer loans: Home equity and second mortgage 538 538 — 573 567 1 1 1 1 Other 8 8 — 9 9 — — — — Commercial business loans 233 236 — 218 206 — — — — Subtotal 4,875 4,956 — 5,016 5,024 61 123 51 101 With an allowance recorded: Mortgage loans: One- to four-family — — — — 161 — — — — Commercial business loans 294 294 73 295 279 — — — — Subtotal 294 294 73 295 440 — — — — Total: Mortgage loans: One- to four-family 895 938 — 899 980 19 41 16 36 Commercial 3,028 3,028 — 3,028 3,099 40 80 33 63 Land 173 208 — 289 324 1 1 1 1 Consumer loans: Home equity and second mortgage 538 538 — 573 567 1 1 1 1 Other 8 8 — 9 9 — — — — Commercial business loans 527 530 73 513 485 — — — — Total $ 5,169 $ 5,250 $ 73 $ 5,311 $ 5,464 $ 61 $ 123 $ 51 $ 101 ______________________________________________ (1) For the three months ended March 31, 2021. (2) For the six months ended March 31, 2021. Recorded Unpaid Principal Balance (Loan Balance Plus Charge Off) Related YTD YTD Interest YTD Cash Basis Interest Income Recognized (1) With no related allowance recorded: Mortgage loans: One- to four-family $ 659 $ 703 $ — $ 1,127 $ 44 $ 34 Commercial 3,242 3,242 — 3,236 133 107 Land 394 438 — 125 — — Consumer loans: Home equity and second mortgage 555 555 — 581 — — Other 9 9 — 6 — — Commercial business loans 182 182 — 176 — — Subtotal 5,041 5,129 — 5,251 177 141 With an allowance recorded: Mortgage loans: One- to four-family 484 484 3 194 16 8 Land — — — 110 — — Consumer loans: Other — — — 7 — — Commercial business loans 248 248 38 370 — — Subtotal 732 732 41 681 16 8 Total Mortgage loans: One- to four-family 1,143 1,187 3 1,321 60 42 Commercial 3,242 3,242 — 3,236 133 107 Land 394 438 — 235 — — Consumer loans: Home equity and second mortgage 555 555 — 581 — — Other 9 9 — 13 — — Commercial business loans 430 430 38 546 — — Total $ 5,773 $ 5,861 $ 41 $ 5,932 $ 193 $ 149 _____________________________________________ (1) For the year ended September 30, 2020.
Schedule Of COVID Loan Modifications	The following tables set forth information with respect to total COVID-19 loan modifications, on deferral status, as of March 31, 2021 and September 30, 2020 (dollars in thousands): COVID-19 Loan Modifications March 31, 2021 Mortgage loans Count Balance Percent Commercial 4 $ 11,174 86.7 % Construction 1 1,517 11.8 Total mortgage loans 5 12,691 98.5 Consumer loans Home equity and second mortgage 1 18 0.1 Total consumer loans 1 18 0.1 Commercial loans 2 175 1.4 Total COVID-19 Modifications 8 $ 12,884 100.0 % COVID-19 Loan Modifications September 30, 2020 Mortgage loans Number Balance Percent One- to four-family 1 $ 467 8.0 % Commercial 2 3,951 67.2 Construction 1 1,402 23.9 Total mortgage loans 4 5,820 99.1 Consumer loans Home equity and second mortgage 1 50 0.9 Total consumer loans 1 50 0.9 Total COVID-19 Modifications 5 $ 5,870 100.0 %
Schedule of Troubled Debt Restructured Loans by Interest Accrual Status	The following tables set forth information with respect to the Company’s TDRs by interest accrual status as of March 31, 2021 and September 30, 2020 (dollars in thousands): March 31, 2021 Accruing Non- Total Mortgage loans: One- to four-family $ 479 $ — $ 479 Commercial 2,385 — 2,385 Land — 124 124 Consumer loans: Home equity and second mortgage — 68 68 Total $ 2,864 $ 192 $ 3,056 September 30, 2020 Accruing Non- Total Mortgage loans: One- to four-family $ 483 $ — $ 483 Commercial 2,385 — 2,385 Land — 130 130 Consumer loans: Home equity and second mortgage — 73 73 Total $ 2,868 $ 203 $ 3,071

Leases (Tables)

Leases (Tables)	6 Months Ended
	Mar. 31, 2021
Leases [Abstract]
Lease, Cost	The components of lease cost (included in the premises and equipment expense category in the consolidated statements of income) are as follows for the three and six months ended March 31, 2021 and 2020 (dollars in thousands): Three Months Ended March 31, 2021 Six Months Ended March 31, 2021 Lease cost: Operating lease cost $ 92 $ 185 Short-term lease cost — — Total lease cost $ 92 $ 185 Three Months Ended March 31, 2020 Six Months Ended March 31, 2020 Lease cost: Operating lease cost $ 83 $ 166 Short-term lease cost — — Total lease cost $ 83 $ 166 The following table provides supplemental information to operating leases for the three and six months ended March 31, 2021 and 2020 (dollars in thousands): At or For Three Months Ended March 31, 2021 At or For Six Months Ended March 31, 2021 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 80 $ 160 Weighted average remaining lease term-operating leases 8.8 years 8.8 years Weighted average discount rate-operating leases 2.23 % 2.23 % At or For Three Months Ended March 31, 2020 At or For Six Months Ended March 31, 2020 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 80 $ 158 Weighted average remaining lease term-operating leases 9.7 years 9.7 years Weighted average discount rate-operating leases 2.22 % 2.22 %
Lessee, Operating Lease, Liability, Maturity	Maturities of operating lease liabilities at March 31, 2021 for future fiscal years are as follows (dollars in thousands): Remainder of 2021 $ 167 2022 342 2023 310 2024 313 2025 317 Thereafter 1,322 Total lease payments 2,771 Less imputed interest 272 Total $ 2,499

Net Income Per Common Share (Ta

Net Income Per Common Share (Tables)	6 Months Ended
	Mar. 31, 2021
Earnings Per Share [Abstract]
Schedule of Earnings per Share	Information regarding the calculation of basic and diluted net income per common share for the three and six months ended March 31, 2021 and 2020 is as follows (dollars in thousands, except per share amounts): Three Months Ended March 31, Six Months Ended March 31, 2021 2020 2021 2020 Basic net income per common share computation Numerator – net income $ 7,251 $ 5,049 $ 14,541 $ 11,701 Denominator – weighted average common shares outstanding 8,331,121 8,344,201 8,322,210 8,342,828 Basic net income per common share $ 0.87 $ 0.61 $ 1.75 $ 1.40 Diluted net income per common share computation Numerator – net income $ 7,251 $ 5,049 $ 14,541 $ 11,701 Denominator – weighted average common shares outstanding 8,331,121 8,344,201 8,322,210 8,342,828 Effect of dilutive stock options (1) 113,677 112,458 106,385 123,066 Weighted average common shares outstanding - assuming dilution 8,444,798 8,456,659 8,428,595 8,465,894 Diluted net income per common share $ 0.86 $ 0.60 $ 1.73 $ 1.38 ____________________________________________ (1) For the three and six months ended March 31, 2021, average options to purchase 135,590 and 136,631 shares of common stock, respectively, were outstanding but not included in the computation of diluted net income per share, because their effect would have been anti-dilutive. For the three and six months ended March 31, 2020, average options to purchase 138,362 and 121,497 shares of common stock, respectively, were outstanding but not included in the computation of diluted net income per shares, because their effect would have been anti-dilutive.

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) (Tables)	6 Months Ended
	Mar. 31, 2021
Equity [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss)	The changes in accumulated other comprehensive income (loss) ("AOCI") by component during the three and six months ended March 31, 2021 and 2020 are as follows (dollars in thousands): Three Months Ended March 31, 2021 Changes in fair value of available for sale securities (1) Changes in OTTI on held to maturity securities (1) Total (1) Balance of AOCI at the beginning of period $ 70 $ (26) $ 44 Other comprehensive income (loss) 74 3 77 Balance of AOCI at the end of period $ 144 $ (23) $ 121 Six Months Ended March 31, 2021 Changes in fair value of available for sale securities (1) Changes in OTTI on held to maturity securities (1) Total (1) Balance of AOCI at the beginning of period $ 87 $ (26) $ 61 Other comprehensive income (loss) 57 3 60 Balance of AOCI at the end of period $ 144 $ (23) $ 121 Three Months Ended March 31, 2020 Changes in fair value of available for sale securities (1) Changes in OTTI on held to maturity securities (1) Total (1) Balance of AOCI at the beginning of period $ (116) $ (30) $ (146) Other comprehensive (loss) income (35) 2 (33) Balance of AOCI at the end of period $ (151) $ (28) $ (179) Six Months Ended March 31, 2020 Changes in fair value of available for sale securities (1) Changes in OTTI on held to maturity securities (1) Total (1) Balance of AOCI at the beginning of period $ 90 $ (40) $ 50 Other comprehensive (loss) income (241) 12 (229) Balance of AOCI at the end of period $ (151) $ (28) $ (179) __________________________ (1) All amounts are net of income taxes.

Stock Compensation Plans (Table

Stock Compensation Plans (Tables)	6 Months Ended
	Mar. 31, 2021
Share-based Payment Arrangement, Noncash Expense [Abstract]
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award	Stock option activity for the six months ended March 31, 2021 and 2020 is summarized as follows: Six Months Ended March 31, 2021 Six Months Ended March 31, 2020 Number of Shares Weighted Number of Shares Weighted Options outstanding, beginning of period 395,349 $ 18.45 378,304 $ 18.15 Exercised (53,564) 9.70 (36,375) 10.30 Granted 1,500 19.13 1,000 26.50 Forfeited (4,520) 27.57 (8,650) 24.84 Options outstanding, end of period 338,765 $ 19.71 334,279 $ 18.86
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions	The weighted average assumptions for options granted during the six months ended March 31, 2021 were as follows: Expected volatility 33 % Expected life (in years) 5 Expected dividend yield 4.76 % Risk free interest rate 0.38 % Grant date fair value per share $ 3.26
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range	Additional information regarding options outstanding at March 31, 2021 is as follows: Options Outstanding Options Exercisable Range of Number Weighted Weighted Number Weighted Weighted $5.86 - 6.00 4,200 $ 5.93 1.5 4,200 $ 5.93 1.5 9.00 30,000 9.00 2.6 30,000 9.00 2.6 10.26 - 10.71 65,575 10.57 4.0 65,575 10.57 4.0 15.67 - 19.13 104,500 16.50 8.2 25,400 15.67 5.5 26.50 - 27.14 43,990 27.13 8.5 8,798 27.13 8.5 29.69 50,400 29.69 6.5 30,300 29.69 6.5 31.80 40,100 31.80 7.5 16,100 31.80 7.5 338,765 $ 19.71 6.5 180,373 $ 16.83 4.9

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Mar. 31, 2021
Fair Value Disclosures [Abstract]
Fair Value, Assets Measured on Recurring Basis	The Company's assets measured at estimated fair value on a recurring basis at March 31, 2021 and September 30, 2020 were as follows (dollars in thousands): March 31, 2021 Estimated Fair Value Level 1 Level 2 Level 3 Total Available for sale investment securities MBS: U.S. government agencies $ — $ 69,184 $ — $ 69,184 Investments in equity securities Mutual funds 957 — — 957 Total $ 957 $ 69,184 $ — $ 70,141 September 30, 2020 Estimated Fair Value Level 1 Level 2 Level 3 Total Available for sale investment securities MBS: U.S. government agencies $ — $ 57,907 $ — $ 57,907 Investments in equity securities Mutual funds 977 — — 977 Total $ 977 $ 57,907 $ — $ 58,884
Balances of Assets Measured at Estimated Fair Value, Nonrecurring Basis	The following table summarizes the balances of assets measured at estimated fair value on a non-recurring basis at March 31, 2021 (dollars in thousands): Estimated Fair Value Level 1 Level 2 Level 3 Impaired loans: Commercial business loans $ — $ — $ 221 Total impaired loans — — 221 OREO and other repossessed assets — — 157 Total $ — $ — $ 378 The following table summarizes the balances of assets measured at estimated fair value on a non-recurring basis at September 30, 2020 (dollars in thousands): Estimated Fair Value Level 1 Level 2 Level 3 Impaired loans: Mortgage loans: One- to four-family $ — $ — $ 481 Commercial business loans — — 210 Total impaired loans — — 691 Investment securities – held to maturity: MBS - private label residential — 8 — OREO and other repossessed assets — — 1,050 Total $ — $ 8 $ 1,741
Level 3 Fair Value Measurements, Nonrecurring Basis	The following table presents quantitative information about Level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis as of March 31, 2021 (dollars in thousands): Estimated Valuation Unobservable Input(s) Range Impaired loans $ 221 Market approach Appraised value less estimated selling costs NA OREO and other repossessed assets $ 157 Market approach Lower of appraised value or listing price less estimated selling costs NA The following table presents quantitative information about Level 3 fair value measurements for financial instruments measured at fair value on a non-recurring basis as of September 30, 2020 (dollars in thousands): Estimated Valuation Unobservable Input(s) Range Impaired loans $ 691 Market approach Appraised value less estimated selling costs NA OREO and other repossessed assets $ 1,050 Market approach Lower of appraised value or listing price less estimated selling costs NA
Balances of Assets and Liabilities Measured at Estimated Fair Value, Recurring Basis	The recorded amounts and estimated fair values of financial instruments were as follows as of March 31, 2021 and September 30, 2020 (dollars in thousands): March 31, 2021 Fair Value Measurements Using: Recorded Estimated Fair Value Financial assets Cash and cash equivalents $ 433,342 $ 433,342 $ 433,342 $ — $ — CDs held for investment 39,674 39,674 39,674 — — Investment securities 105,649 107,022 8,953 97,572 497 Investments in equity securities 957 957 957 — — FHLB stock 2,303 2,303 2,303 — — Other investments 3,000 3,000 3,000 — — Loans held for sale 8,455 8,714 8,714 — — Loans receivable, net 1,030,683 1,040,302 — — 1,040,302 Accrued interest receivable 4,471 4,471 4,471 — — Financial liabilities Certificates of deposit 142,781 144,344 — — 144,344 FHLB borrowings 10,000 9,939 — — 9,939 Accrued interest payable 182 182 182 — — September 30, 2020 Fair Value Measurements Using: Recorded Estimated Fair Value Level 1 Level 2 Level 3 Financial assets Cash and cash equivalents $ 314,452 $ 314,452 $ 314,452 $ — $ — CDs held for investment 65,545 65,545 65,545 — — Investment securities 85,797 87,734 — 87,235 499 Investments in equity securities 977 977 977 — — FHLB stock 1,922 1,922 1,922 — — Other investments 3,000 3,000 3,000 — — Loans held for sale 4,509 4,664 4,664 — — Loans receivable, net 1,013,875 1,034,876 — — 1,034,876 Accrued interest receivable 4,484 4,484 4,484 — — Financial liabilities Certificates of deposit 158,524 160,921 — — 160,921 FHLB borrowings 10,000 10,167 — — 10,167 Accrued interest payable 274 274 274 — —

Summary Of Significant Accoun_3

Summary Of Significant Accounting Policies (Details)	6 Months Ended
	Mar. 31, 2021segment
Accounting Policies [Abstract]
Number of operating segments	1

Investment Securities_ Marketab

Investment Securities: Marketable Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Sep. 30, 2020
Held to maturity
Amortized Cost	$ 36,465	$ 27,890
Gross Unrealized Gains	1,476	1,942
Gross Unrealized Losses	(103)	(5)
Estimated Fair Value	37,838	29,827
Available for sale
Estimated Fair Value	70,141	58,884
Mortgage-backed Securities, U.S. government agencies
Held to maturity
Amortized Cost	21,888	27,161
Gross Unrealized Gains	1,164	1,635
Gross Unrealized Losses	(9)	(3)
Estimated Fair Value	23,043	28,793
Available for sale
Amortized Cost	69,001	57,797
Gross Unrealized Gains	282	178
Gross Unrealized Losses	(99)	(68)
Estimated Fair Value	69,184	57,907
Mortgage-backed Securities, Private label residential
Held to maturity
Amortized Cost	5,056	229
Gross Unrealized Gains	312	307
Gross Unrealized Losses	(23)	(1)
Estimated Fair Value	5,345	535
U.S. Treasury and U.S. government agency securities
Held to maturity
Amortized Cost	9,021	500
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(68)	(1)
Estimated Fair Value	8,953	$ 499
Bank issued trust preferred securities
Held to maturity
Amortized Cost	500
Gross Unrealized Gains	0
Gross Unrealized Losses	(3)
Estimated Fair Value	$ 497

Investment Securities_ Unrealiz

Investment Securities: Unrealized Gain (Loss) on Investments (Details) $ in Thousands	Mar. 31, 2021USD ($)security	Sep. 30, 2020USD ($)security
Held-to-maturity Securities, Fair Value:
Held to maturity, Less Than 12 Months, Estimated Fair Value	$ 16,384	$ 5,636
Held to maturity, 12 Months or Longer, Estimated Fair Value	36	50
Held to maturity, Total, Estimated Fair Value	16,420	5,686
Held-to-maturity Securities, Gross Unrealized Losses
Held to maturity, Less Than 12 Months, Gross Unrealized Losses	(102)	(3)
Held to maturity, 12 Months or Longer, Gross Unrealized Losses	(1)	(2)
Held to maturity, Total, Gross Unrealized Losses	$ (103)	$ (5)
Held to maturity, Less Than 12 Months, Quantity | security	8	6
Held to maturity, 12 Months or Longer, Quantity | security	6	6
Available-for-sale Securities, Fair Value:
Available for sale, Less Than 12 Months, Estimated Fair Value	$ 22,873	$ 21,464
Available for sale, 12 Months or Longer, Estimated Fair Value	0	0
Available for sale, Total, Estimated Fair Value	22,873	21,464
Available-for-sale Securities, Gross Unrealized Losses:
Available for sale, Less Than 12 Months, Gross Unrealized Losses	(99)	(68)
Available for sale, 12 Months or Longer, Gross Unrealized Losses	0	0
Available for sale, Total, Gross Unrealized Losses	$ (99)	$ (68)
Available-for-sale, Less than 12 Months, Quantity | security	12	11
Available-for-sale, 12 Months or Longer, Quantity | security	0	0
Mortgage-backed Securities, U.S. government agencies
Held-to-maturity Securities, Fair Value:
Held to maturity, Less Than 12 Months, Estimated Fair Value	$ 2,098	$ 5,130
Held to maturity, 12 Months or Longer, Estimated Fair Value	34	39
Held to maturity, Total, Estimated Fair Value	2,132	5,169
Held-to-maturity Securities, Gross Unrealized Losses
Held to maturity, Less Than 12 Months, Gross Unrealized Losses	(8)	(2)
Held to maturity, 12 Months or Longer, Gross Unrealized Losses	(1)	(1)
Held to maturity, Total, Gross Unrealized Losses	$ (9)	$ (3)
Held to maturity, Less Than 12 Months, Quantity | security	3	4
Held to maturity, 12 Months or Longer, Quantity | security	4	4
Available-for-sale Securities, Fair Value:
Available for sale, Less Than 12 Months, Estimated Fair Value	$ 22,873	$ 21,464
Available for sale, 12 Months or Longer, Estimated Fair Value	0	0
Available for sale, Total, Estimated Fair Value	22,873	21,464
Available-for-sale Securities, Gross Unrealized Losses:
Available for sale, Less Than 12 Months, Gross Unrealized Losses	(99)	(68)
Available for sale, 12 Months or Longer, Gross Unrealized Losses	0	0
Available for sale, Total, Gross Unrealized Losses	$ (99)	$ (68)
Available-for-sale, Less than 12 Months, Quantity | security	12	11
Available-for-sale, 12 Months or Longer, Quantity | security	0	0
Mortgage-backed Securities, Private label residential
Held-to-maturity Securities, Fair Value:
Held to maturity, Less Than 12 Months, Estimated Fair Value	$ 4,836	$ 7
Held to maturity, 12 Months or Longer, Estimated Fair Value	2	11
Held to maturity, Total, Estimated Fair Value	4,838	18
Held-to-maturity Securities, Gross Unrealized Losses
Held to maturity, Less Than 12 Months, Gross Unrealized Losses	(23)	0
Held to maturity, 12 Months or Longer, Gross Unrealized Losses	0	(1)
Held to maturity, Total, Gross Unrealized Losses	$ (23)	$ (1)
Held to maturity, Less Than 12 Months, Quantity | security	1	1
Held to maturity, 12 Months or Longer, Quantity | security	2	2
U.S. Treasury and U.S. government agency securities
Held-to-maturity Securities, Fair Value:
Held to maturity, Less Than 12 Months, Estimated Fair Value	$ 8,953
Held to maturity, 12 Months or Longer, Estimated Fair Value	0
Held to maturity, Total, Estimated Fair Value	8,953
Held-to-maturity Securities, Gross Unrealized Losses
Held to maturity, Less Than 12 Months, Gross Unrealized Losses	(68)
Held to maturity, 12 Months or Longer, Gross Unrealized Losses	0
Held to maturity, Total, Gross Unrealized Losses	$ (68)
Held to maturity, Less Than 12 Months, Quantity | security	3
Held to maturity, 12 Months or Longer, Quantity | security	0
Bank issued trust preferred securities
Held-to-maturity Securities, Fair Value:
Held to maturity, Less Than 12 Months, Estimated Fair Value	$ 497	$ 499
Held to maturity, 12 Months or Longer, Estimated Fair Value	0	0
Held to maturity, Total, Estimated Fair Value	497	499
Held-to-maturity Securities, Gross Unrealized Losses
Held to maturity, Less Than 12 Months, Gross Unrealized Losses	(3)	(1)
Held to maturity, 12 Months or Longer, Gross Unrealized Losses	0	0
Held to maturity, Total, Gross Unrealized Losses	$ (3)	$ (1)
Held to maturity, Less Than 12 Months, Quantity | security	1	1
Held to maturity, 12 Months or Longer, Quantity | security	0	0

Investment Securities_ Schedule

Investment Securities: Schedule of significant inputs utilized to measure management's estimate of the credit loss component on OTTI securities (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Net recoveries on investment securities	$ (3)	$ (3)	$ (8)	$ (106)
Held-to-maturity Securities
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Recoveries (other than temporary impairment OTTI) on investment securities	3	3	8	106
Held to Maturity - adjustment for portion of OTTI recorded as OCI before income taxes	0	0	0	0
Net recoveries on investment securities	$ 3	$ 3	$ 8	$ 106
Minimum
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
OTTI significant inputs - Constant prepayment rate	6.00%	6.00%	6.00%	6.00%
OTTI significant inputs - Collateral default rate	1.73%	1.86%	1.73%	1.86%
OTTI significant inputs - Loss severity rate	0.00%	0.00%	0.00%	0.00%
Maximum
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
OTTI significant inputs - Constant prepayment rate	15.00%	15.00%	15.00%	15.00%
OTTI significant inputs - Collateral default rate	28.92%	22.47%	28.92%	22.47%
OTTI significant inputs - Loss severity rate	18.93%	16.34%	18.93%	16.34%
Weighted Average
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
OTTI significant inputs - Constant prepayment rate	13.18%	10.91%	13.18%	10.91%
OTTI significant inputs - Collateral default rate	13.94%	10.44%	13.94%	10.44%
OTTI significant inputs - Loss severity rate	5.79%	4.02%	5.79%	4.02%

Investment Securities_ Other th

Investment Securities: Other than Temporary Impairment, Credit Losses Recognized in Earnings (Details) - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Beginning balance of credit loss	$ 885	$ 1,071
Realized losses previously recorded as credit losses	(5)	(60)
Recovery of prior credit loss	(8)	(106)
Ending balance of credit loss	$ 872	$ 905

Investment Securities_ Narrativ

Investment Securities: Narrative-Realized Gains (Losses) (Details) $ in Thousands	6 Months Ended
	Mar. 31, 2021USD ($)security	Mar. 31, 2020USD ($)security	Sep. 30, 2020USD ($)
Investments [Abstract]
Loss on sale of securities	$ 5	$ 60
Held-to-maturity securities, realized loss, number of securities | security	13	19
Security owned and pledged as collateral	$ 96,240		$ 81,030

Investment Securities_ Schedu_2

Investment Securities: Schedule of Contractual maturities of debt securities (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Sep. 30, 2020
Held-to-maturity Securities, Amortized Cost:
Due within one year	$ 0
Due after one year to five years	8,230
Due after five years to ten years	13,703
Due after ten years	14,532
Total	36,465	$ 27,890	[1]
Held-to-maturity Securities, Estimated Fair Value:
Due within one year	0
Due after one year to five years	8,290
Due after five years to ten years	14,180
Due after ten years	15,368
Total	37,838	$ 29,827
Available-for-sale Securities, Amortized Cost:
Due within one year	1,428
Due after one year to five years	2,829
Due after five years to ten years	19,173
Due after ten years	45,571
Total	69,001
Available-for-sale Securities, Estimated Fair Value:
Due within one year	1,421
Due after one year to five years	2,829
Due after five years to ten years	19,236
Due after ten years	45,698
Total	$ 69,184
[1]	Derived from audited consolidated financial statements.

Goodwill and CDI - Goodwill (De

Goodwill and CDI - Goodwill (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Sep. 30, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 15,131	$ 15,131	[1]
[1]	Derived from audited consolidated financial statements.

Loans Receivable And Allowanc_3

Loans Receivable And Allowance For Loan Losses: Schedule of Loans receivable and Loans held for sale (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Sep. 30, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable	$ 1,141,666	$ 1,134,283
Undisbursed portion of construction  loans in process	90,550	100,558
Deferred loan origination fees, net	6,999	6,436
Allowance for loan losses	13,434	13,414
Less: Loans in process, Deferred fees and Allowance for loan losses	110,983	120,408
Loans receivable, net	$ 1,030,683	$ 1,013,875	[1]
Ratio of loan category to total loans receivable (percent)	100.00%	100.00%
Mortgage loans excluded	$ 8,455	$ 4,509
Total mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans	$ 902,064	$ 902,274
Ratio of loan category to total loans receivable (percent)	79.10%	79.60%
Mortgage loans, one-to-four family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans	$ 117,184	$ 118,580
Ratio of loan category to total loans receivable (percent)	10.30%	10.50%
Mortgage loans, multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans	$ 92,435	$ 85,053
Ratio of loan category to total loans receivable (percent)	8.10%	7.50%
Mortgage loans, commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans	$ 461,966	$ 453,574
Ratio of loan category to total loans receivable (percent)	40.50%	40.00%
Mortgage loans, construction - custom and owner/builder
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans	$ 105,305	$ 129,572
Ratio of loan category to total loans receivable (percent)	9.20%	11.40%
Mortgage loans, construction - speculative one-to-four family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans	$ 17,289	$ 14,592
Ratio of loan category to total loans receivable (percent)	1.50%	1.30%
Mortgage loans, construction – commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans	$ 42,340	$ 33,144
Ratio of loan category to total loans receivable (percent)	3.70%	2.90%
Mortgage loans, construction - Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans	$ 44,266	$ 34,476
Ratio of loan category to total loans receivable (percent)	3.90%	3.00%
Mortgage loans, construction - Land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans	$ 2,238	$ 7,712
Ratio of loan category to total loans receivable (percent)	0.20%	0.70%
Mortgage loans, land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans	$ 19,041	$ 25,571
Ratio of loan category to total loans receivable (percent)	1.70%	2.30%
Total consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer loans	$ 34,782	$ 35,649
Ratio of loan category to total loans receivable (percent)	3.00%	3.10%
Consumer loans, home equity and second mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer loans	$ 32,026	$ 32,077
Ratio of loan category to total loans receivable (percent)	2.80%	2.80%
Consumer loans, other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer loans	$ 2,756	$ 3,572
Ratio of loan category to total loans receivable (percent)	0.20%	0.30%
Commercial business loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial business loans	$ 66,645	$ 69,540
Ratio of loan category to total loans receivable (percent)	5.80%	6.10%
SBA PPP Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial business loans	$ 138,175	$ 126,820
Ratio of loan category to total loans receivable (percent)	12.10%	11.20%
Total Commercial Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial business loans	$ 204,820	$ 196,360
Ratio of loan category to total loans receivable (percent)	17.90%	17.30%
[1]	Derived from audited consolidated financial statements.

Loans Receivable And Allowanc_4

Loans Receivable And Allowance For Loan Losses - Narrative (Details) - USD ($)	Mar. 31, 2021	Sep. 30, 2020
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
Unamortized loan commitment and origination fees and unamortized discounts or premiums	$ 583,000	$ 790,000
Troubled debt restructured loan	3,056,000	3,071,000
Loans and leases receivable, impaired, commitment to lend	0	0
Allowance for loan losses allocated to TDR loans	$ 0	$ 3,000

Loans Receivable And Allowanc_5

Loans Receivable And Allowance For Loan Losses: Schedule of Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, Beginning Allowance	$ 13,432	$ 9,882	$ 13,414	$ 9,690
Provision for (Recapture of) Loan Losses	0	2,000	0	2,200
Charge- offs	(3)	(1)	(3)	(26)
Recoveries	5	9	23	26
Allowance for loan losses, Ending Allowance	13,434	11,890	13,434	11,890
Mortgage loans, one-to-four family
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, Beginning Allowance	1,135	1,065	1,163	1,167
Provision for (Recapture of) Loan Losses	16	83	(12)	(21)
Charge- offs	0	0	0	0
Recoveries	0	1	0	3
Allowance for loan losses, Ending Allowance	1,151	1,149	1,151	1,149
Mortgage loans, multi-family
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, Beginning Allowance	757	499	718	481
Provision for (Recapture of) Loan Losses	27	96	66	114
Charge- offs	0	0	0	0
Recoveries	0	0	0	0
Allowance for loan losses, Ending Allowance	784	595	784	595
Mortgage loans, commercial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, Beginning Allowance	7,136	4,410	7,144	4,154
Provision for (Recapture of) Loan Losses	102	1,351	94	1,603
Charge- offs	0	0	0	0
Recoveries	0	1	0	5
Allowance for loan losses, Ending Allowance	7,238	5,762	7,238	5,762
Mortgage loans, construction - custom and owner/builder
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, Beginning Allowance	770	754	832	755
Provision for (Recapture of) Loan Losses	(75)	(57)	(137)	(63)
Charge- offs	0	0	0	0
Recoveries	0	0	0	5
Allowance for loan losses, Ending Allowance	695	697	695	697
Mortgage loans, construction - speculative one-to-four family
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, Beginning Allowance	182	248	158	212
Provision for (Recapture of) Loan Losses	(34)	(44)	(10)	(8)
Charge- offs	0	0	0	0
Recoveries	0	0	0	0
Allowance for loan losses, Ending Allowance	148	204	148	204
Mortgage loans, construction – commercial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, Beginning Allowance	558	403	420	338
Provision for (Recapture of) Loan Losses	156	20	294	85
Charge- offs	0	0	0	0
Recoveries	0	0	0	0
Allowance for loan losses, Ending Allowance	714	423	714	423
Mortgage loans, construction - Multi-family
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, Beginning Allowance	186	333	238	375
Provision for (Recapture of) Loan Losses	137	61	85	19
Charge- offs	0	0	0	0
Recoveries	0	0	0	0
Allowance for loan losses, Ending Allowance	323	394	323	394
Mortgage loans, construction - Land development
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, Beginning Allowance	123	48	133	67
Provision for (Recapture of) Loan Losses	(104)	32	(114)	13
Charge- offs	0		0	0
Recoveries	0	0	0	0
Allowance for loan losses, Ending Allowance	19	80	19	80
Mortgage loans, land
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, Beginning Allowance	474	654	572	697
Provision for (Recapture of) Loan Losses	(72)	19	(175)	(29)
Charge- offs	0	0	0	0
Recoveries	5	5	10	10
Allowance for loan losses, Ending Allowance	407	678	407	678
Consumer loans, home equity and second mortgage
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, Beginning Allowance	605	609	593	623
Provision for (Recapture of) Loan Losses	(53)	47	(41)	33
Charge- offs	0	0	0	0
Recoveries	0	0	0	0
Allowance for loan losses, Ending Allowance	552	656	552	656
Consumer loans, other
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, Beginning Allowance	57	87	71	99
Provision for (Recapture of) Loan Losses	0	(10)	(18)	(13)
Charge- offs	(1)	(1)	(1)	(11)
Recoveries	0	2	4	3
Allowance for loan losses, Ending Allowance	56	78	56	78
Commercial business loans
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, Beginning Allowance	1,449	772	1,372	722
Provision for (Recapture of) Loan Losses	(100)	402	(32)	467
Charge- offs	(2)	0	(2)	(15)
Recoveries	0	0	9	0
Allowance for loan losses, Ending Allowance	1,347	$ 1,174	1,347	$ 1,174
SBA PPP Loans
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, Beginning Allowance	0		0
Provision for (Recapture of) Loan Losses	0		0
Charge- offs	0		0
Recoveries	0		0
Allowance for loan losses, Ending Allowance	$ 0		$ 0

Loans Receivable And Allowanc_6

Loans Receivable And Allowance For Loan Losses: Schedule of loans evaluated individually for impairment and collectively evaluated for impairment in the allowance for loan losses (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	$ 73		$ 41
Allowance for Loan Losses, Collectively Evaluated for Impairment	13,361		13,373
Allowance for Loan Losses, Total	13,434	$ 13,432	13,414	$ 11,890	$ 9,882	$ 9,690
Recorded Investment in Loans, Individually Evaluated for Impairment	5,169		5,773
Recorded Investment in Loans, Collectively Evaluated for Impairment	1,045,947		1,027,952
Loans receivable	1,051,116		1,033,725
Mortgage loans, one-to-four family
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	0		3
Allowance for Loan Losses, Collectively Evaluated for Impairment	1,151		1,160
Allowance for Loan Losses, Total	1,151	1,135	1,163	1,149	1,065	1,167
Recorded Investment in Loans, Individually Evaluated for Impairment	896		1,143
Recorded Investment in Loans, Collectively Evaluated for Impairment	116,288		117,437
Loans receivable	117,184		118,580
Mortgage loans, multi-family
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	0		0
Allowance for Loan Losses, Collectively Evaluated for Impairment	784		718
Allowance for Loan Losses, Total	784	757	718	595	499	481
Recorded Investment in Loans, Individually Evaluated for Impairment	0		0
Recorded Investment in Loans, Collectively Evaluated for Impairment	92,435		85,053
Loans receivable	92,435		85,053
Mortgage loans, commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	0		0
Allowance for Loan Losses, Collectively Evaluated for Impairment	7,238		7,144
Allowance for Loan Losses, Total	7,238	7,136	7,144	5,762	4,410	4,154
Recorded Investment in Loans, Individually Evaluated for Impairment	3,028		3,242
Recorded Investment in Loans, Collectively Evaluated for Impairment	458,938		450,332
Loans receivable	461,966		453,574
Mortgage loans, construction - custom and owner/builder
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	0		0
Allowance for Loan Losses, Collectively Evaluated for Impairment	695		832
Allowance for Loan Losses, Total	695	770	832	697	754	755
Recorded Investment in Loans, Individually Evaluated for Impairment	0		0
Recorded Investment in Loans, Collectively Evaluated for Impairment	62,973		75,332
Loans receivable	62,973		75,332
Mortgage loans, construction - speculative one-to-four family
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	0		0
Allowance for Loan Losses, Collectively Evaluated for Impairment	148		158
Allowance for Loan Losses, Total	148	182	158	204	248	212
Recorded Investment in Loans, Individually Evaluated for Impairment	0		0
Recorded Investment in Loans, Collectively Evaluated for Impairment	7,336		7,108
Loans receivable	7,336		7,108
Mortgage loans, construction – commercial
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	0		0
Allowance for Loan Losses, Collectively Evaluated for Impairment	714		420
Allowance for Loan Losses, Total	714	558	420	423	403	338
Recorded Investment in Loans, Individually Evaluated for Impairment	0		0
Recorded Investment in Loans, Collectively Evaluated for Impairment	34,217		20,927
Loans receivable	34,217		20,927
Mortgage loans, construction - Multi-family
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	0		0
Allowance for Loan Losses, Collectively Evaluated for Impairment	323		238
Allowance for Loan Losses, Total	323	186	238	394	333	375
Recorded Investment in Loans, Individually Evaluated for Impairment	0		0
Recorded Investment in Loans, Collectively Evaluated for Impairment	15,739		10,832
Loans receivable	15,739		10,832
Mortgage loans, construction - Land development
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	0		0
Allowance for Loan Losses, Collectively Evaluated for Impairment	19		133
Allowance for Loan Losses, Total	19	123	133	80	48	67
Recorded Investment in Loans, Individually Evaluated for Impairment	0		0
Recorded Investment in Loans, Collectively Evaluated for Impairment	623		4,739
Loans receivable	623		4,739
Mortgage loans, land
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	0		0
Allowance for Loan Losses, Collectively Evaluated for Impairment	407		572
Allowance for Loan Losses, Total	407	474	572	678	654	697
Recorded Investment in Loans, Individually Evaluated for Impairment	173		394
Recorded Investment in Loans, Collectively Evaluated for Impairment	18,868		25,177
Loans receivable	19,041		25,571
Consumer loans, home equity and second mortgage
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	0		0
Allowance for Loan Losses, Collectively Evaluated for Impairment	552		593
Allowance for Loan Losses, Total	552	605	593	656	609	623
Recorded Investment in Loans, Individually Evaluated for Impairment	537		555
Recorded Investment in Loans, Collectively Evaluated for Impairment	31,489		31,522
Loans receivable	32,026		32,077
Consumer loans, other
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	0		0
Allowance for Loan Losses, Collectively Evaluated for Impairment	56		71
Allowance for Loan Losses, Total	56	57	71	78	87	99
Recorded Investment in Loans, Individually Evaluated for Impairment	8		9
Recorded Investment in Loans, Collectively Evaluated for Impairment	2,748		3,563
Loans receivable	2,756		3,572
Commercial business loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	73		38
Allowance for Loan Losses, Collectively Evaluated for Impairment	1,274		1,334
Allowance for Loan Losses, Total	1,347	1,449	1,372	$ 1,174	$ 772	$ 722
Recorded Investment in Loans, Individually Evaluated for Impairment	527		430
Recorded Investment in Loans, Collectively Evaluated for Impairment	66,118		69,110
Loans receivable	66,645		69,540
SBA PPP Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	0		0
Allowance for Loan Losses, Collectively Evaluated for Impairment	0		0
Allowance for Loan Losses, Total	0	$ 0	0
Recorded Investment in Loans, Individually Evaluated for Impairment	0		0
Recorded Investment in Loans, Collectively Evaluated for Impairment	138,175		126,820
Loans receivable	$ 138,175		$ 126,820

Loans Receivable And Allowanc_7

Loans Receivable And Allowance For Loan Losses: Past Due Status of Loans (Details) - USD ($) $ in Thousands		Mar. 31, 2021		Sep. 30, 2020
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		$ 3,928		$ 3,748
Loans receivable, Non-Accrual	[1]	2,305		2,905
Loans receivable, Current		1,047,188		1,029,977
Loans receivable		1,051,116		1,033,725
Mortgage loans, one-to-four family
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		415		727
Loans receivable, Non-Accrual	[1]	415		659
Loans receivable, Current		116,769		117,853
Loans receivable		117,184		118,580
Mortgage loans, multi-family
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		0		0
Loans receivable, Non-Accrual	[1]	0		0
Loans receivable, Current		92,435		85,053
Loans receivable		92,435		85,053
Mortgage loans, commercial
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		1,157		1,377
Loans receivable, Non-Accrual	[1]	643		858
Loans receivable, Current		460,809		452,197
Loans receivable		461,966		453,574
Mortgage loans, construction - custom and owner/builder
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		808		0
Loans receivable, Non-Accrual	[1]	0		0
Loans receivable, Current		62,165		75,332
Loans receivable		62,973		75,332
Mortgage loans, construction - speculative one-to-four family
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		0		0
Loans receivable, Non-Accrual	[1]	0		0
Loans receivable, Current		7,336		7,108
Loans receivable		7,336		7,108
Mortgage loans, construction – commercial
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		0		0
Loans receivable, Non-Accrual	[1]	0		0
Loans receivable, Current		34,217		20,927
Loans receivable		34,217		20,927
Mortgage loans, construction - Multi-family
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		0		0
Loans receivable, Non-Accrual	[1]	0		0
Loans receivable, Current		15,739		10,832
Loans receivable		15,739		10,832
Mortgage loans, construction - Land development
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		0		38
Loans receivable, Non-Accrual	[1]	0		0
Loans receivable, Current		623		4,701
Loans receivable		623		4,739
Mortgage loans, land
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		390		538
Loans receivable, Non-Accrual	[1]	173		394
Loans receivable, Current		18,651		25,033
Loans receivable		19,041		25,571
Consumer loans, home equity and second mortgage
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		612		577
Loans receivable, Non-Accrual	[1]	539		555
Loans receivable, Current		31,414		31,500
Loans receivable		32,026		32,077
Consumer loans, other
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		19		12
Loans receivable, Non-Accrual	[1]	8		9
Loans receivable, Current		2,737		3,560
Loans receivable		2,756		3,572
Commercial business loans
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		527		479
Loans receivable, Non-Accrual		527	[1]	430
Loans receivable, Current		66,118		69,061
Loans receivable		66,645		69,540
SBA PPP Loans
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		0		0
Loans receivable, Non-Accrual		0		0	[1]
Loans receivable, Current		138,175		126,820
Loans receivable		138,175		126,820
30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		1,550		52
30 to 59 Days Past Due | Mortgage loans, one-to-four family
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		0		0
30 to 59 Days Past Due | Mortgage loans, multi-family
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		0		0
30 to 59 Days Past Due | Mortgage loans, commercial
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		514		0
30 to 59 Days Past Due | Mortgage loans, construction - custom and owner/builder
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		808		0
30 to 59 Days Past Due | Mortgage loans, construction - speculative one-to-four family
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		0		0
30 to 59 Days Past Due | Mortgage loans, construction – commercial
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		0		0
30 to 59 Days Past Due | Mortgage loans, construction - Multi-family
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		0		0
30 to 59 Days Past Due | Mortgage loans, construction - Land development
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		0		0
30 to 59 Days Past Due | Mortgage loans, land
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		217		0
30 to 59 Days Past Due | Consumer loans, home equity and second mortgage
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		0		0
30 to 59 Days Past Due | Consumer loans, other
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		11		3
30 to 59 Days Past Due | Commercial business loans
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		0		49
30 to 59 Days Past Due | SBA PPP Loans
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		0		0
60 to 89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		73		791
60 to 89 Days Past Due | Mortgage loans, one-to-four family
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		0		68
60 to 89 Days Past Due | Mortgage loans, multi-family
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		0		0
60 to 89 Days Past Due | Mortgage loans, commercial
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		0		519
60 to 89 Days Past Due | Mortgage loans, construction - custom and owner/builder
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		0		0
60 to 89 Days Past Due | Mortgage loans, construction - speculative one-to-four family
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		0		0
60 to 89 Days Past Due | Mortgage loans, construction – commercial
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		0		0
60 to 89 Days Past Due | Mortgage loans, construction - Multi-family
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		0		0
60 to 89 Days Past Due | Mortgage loans, construction - Land development
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		0		38
60 to 89 Days Past Due | Mortgage loans, land
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		0		144
60 to 89 Days Past Due | Consumer loans, home equity and second mortgage
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		73		22
60 to 89 Days Past Due | Consumer loans, other
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		0		0
60 to 89 Days Past Due | Commercial business loans
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		0
60 to 89 Days Past Due | SBA PPP Loans
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		0		0
Past Due 90 Days or More and Still Accruing
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		0		0
Past Due 90 Days or More and Still Accruing | Mortgage loans, one-to-four family
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		0		0
Past Due 90 Days or More and Still Accruing | Mortgage loans, multi-family
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		0		0
Past Due 90 Days or More and Still Accruing | Mortgage loans, commercial
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		0		0
Past Due 90 Days or More and Still Accruing | Mortgage loans, construction - custom and owner/builder
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		0		0
Past Due 90 Days or More and Still Accruing | Mortgage loans, construction - speculative one-to-four family
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		0		0
Past Due 90 Days or More and Still Accruing | Mortgage loans, construction – commercial
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		0		0
Past Due 90 Days or More and Still Accruing | Mortgage loans, construction - Multi-family
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		0		0
Past Due 90 Days or More and Still Accruing | Mortgage loans, construction - Land development
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		0		0
Past Due 90 Days or More and Still Accruing | Mortgage loans, land
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		0		0
Past Due 90 Days or More and Still Accruing | Consumer loans, home equity and second mortgage
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		0		0
Past Due 90 Days or More and Still Accruing | Consumer loans, other
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		0		0
Past Due 90 Days or More and Still Accruing | Commercial business loans
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		0
Past Due 90 Days or More and Still Accruing | SBA PPP Loans
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		$ 0		$ 0
[1]	Includes non-accrual loans past due 90 days or more and other loans classified as non-accrual.

Loans Receivable And Allowanc_8

Loans Receivable And Allowance For Loan Losses: Financing Receivable Credit Quality Indicators (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Sep. 30, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	$ 1,051,116	$ 1,033,725
Mortgage loans, one-to-four family
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	117,184	118,580
Mortgage loans, multi-family
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	92,435	85,053
Mortgage loans, commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	461,966	453,574
Mortgage loans, construction - custom and owner/builder
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	62,973	75,332
Mortgage loans, construction - speculative one-to-four family
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	7,336	7,108
Mortgage loans, construction – commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	34,217	20,927
Mortgage loans, construction - Multi-family
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	15,739	10,832
Mortgage loans, construction - Land development
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	623	4,739
Mortgage loans, land
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	19,041	25,571
Consumer loans, home equity and second mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	32,026	32,077
Consumer loans, other
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	2,756	3,572
Commercial business loans
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	66,645	69,540
SBA PPP Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	138,175	126,820
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	1,022,518	1,012,666
Pass | Mortgage loans, one-to-four family
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	115,603	115,992
Pass | Mortgage loans, multi-family
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	92,435	85,053
Pass | Mortgage loans, commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	439,977	441,037
Pass | Mortgage loans, construction - custom and owner/builder
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	62,165	74,529
Pass | Mortgage loans, construction - speculative one-to-four family
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	7,336	7,108
Pass | Mortgage loans, construction – commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	32,700	19,525
Pass | Mortgage loans, construction - Multi-family
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	15,739	10,832
Pass | Mortgage loans, construction - Land development
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	583	4,701
Pass | Mortgage loans, land
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	17,727	23,290
Pass | Consumer loans, home equity and second mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	31,331	31,344
Pass | Consumer loans, other
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	2,717	3,531
Pass | Commercial business loans
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	66,030	68,904
Pass | SBA PPP Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	138,175	126,820
Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	15,355	11,546
Watch | Mortgage loans, one-to-four family
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	615	1,369
Watch | Mortgage loans, multi-family
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	0	0
Watch | Mortgage loans, commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	13,290	7,712
Watch | Mortgage loans, construction - custom and owner/builder
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	808	803
Watch | Mortgage loans, construction - speculative one-to-four family
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	0	0
Watch | Mortgage loans, construction – commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	0	0
Watch | Mortgage loans, construction - Multi-family
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	0	0
Watch | Mortgage loans, construction - Land development
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	0	0
Watch | Mortgage loans, land
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	575	1,518
Watch | Consumer loans, home equity and second mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	36	53
Watch | Consumer loans, other
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	31	32
Watch | Commercial business loans
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	0	59
Watch | SBA PPP Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	0	0
Special Mention
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	10,272	5,864
Special Mention | Mortgage loans, one-to-four family
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	544	551
Special Mention | Mortgage loans, multi-family
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	0	0
Special Mention | Mortgage loans, commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	7,600	3,447
Special Mention | Mortgage loans, construction - custom and owner/builder
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	0	0
Special Mention | Mortgage loans, construction - speculative one-to-four family
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	0	0
Special Mention | Mortgage loans, construction – commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	1,517	1,402
Special Mention | Mortgage loans, construction - Multi-family
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	0	0
Special Mention | Mortgage loans, construction - Land development
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	0	0
Special Mention | Mortgage loans, land
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	566	370
Special Mention | Consumer loans, home equity and second mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	0	0
Special Mention | Consumer loans, other
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	0	0
Special Mention | Commercial business loans
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	45	94
Special Mention | SBA PPP Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	0	0
Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	2,971	3,649
Substandard | Mortgage loans, one-to-four family
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	422	668
Substandard | Mortgage loans, multi-family
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	0	0
Substandard | Mortgage loans, commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	1,099	1,378
Substandard | Mortgage loans, construction - custom and owner/builder
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	0	0
Substandard | Mortgage loans, construction - speculative one-to-four family
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	0	0
Substandard | Mortgage loans, construction – commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	0	0
Substandard | Mortgage loans, construction - Multi-family
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	0	0
Substandard | Mortgage loans, construction - Land development
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	40	38
Substandard | Mortgage loans, land
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	173	393
Substandard | Consumer loans, home equity and second mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	659	680
Substandard | Consumer loans, other
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	8	9
Substandard | Commercial business loans
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	570	483
Substandard | SBA PPP Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	$ 0	$ 0

Loans Receivable And Allowanc_9

Loans Receivable And Allowance For Loan Losses: Impaired Financing Receivables (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended	12 Months Ended
	Mar. 31, 2021		Mar. 31, 2021	Sep. 30, 2020
Recorded Investment
With no related allowance recorded	$ 4,875		$ 4,875	$ 5,041
With an allowance recorded	294		294	732
Total:	5,169		5,169	5,773
Unpaid Principal Balance (Loan Balance Plus Charge Off)
With no related allowance recorded	4,956		4,956	5,129
With an allowance recorded	294		294	732
Total:	5,250		5,250	5,861
Related Allowance	73		73	41
Average Recorded Investment
With no related allowance recorded	5,016	[1]	5,024	5,251
With an allowance recorded	295	[1]	440	681
Total	5,311	[1]	5,464	5,932
Interest Income Recognized
With no related allowance recorded	61	[1]	123	177	[1]
With an allowance recorded	0	[1]	0	16
Total	61	[1]	123	193
Cash Basis Interest Income Recognized
With no related allowance recorded	51	[1]	101	141
With an allowance recorded	0	[1]	0	8
Total	51	[1]	101	149
Mortgage loans, one-to-four family
Recorded Investment
With no related allowance recorded	895		895	659
With an allowance recorded	0		0	484
Total:	895		895	1,143
Unpaid Principal Balance (Loan Balance Plus Charge Off)
With no related allowance recorded	938		938	703
With an allowance recorded	0		0	484
Total:	938		938	1,187
Related Allowance	0		0	3
Average Recorded Investment
With no related allowance recorded	899	[1]	819	1,127
With an allowance recorded	0	[1]	161	194
Total	899	[1]	980	1,321
Interest Income Recognized
With no related allowance recorded	19	[1]	41	44	[1]
With an allowance recorded	0	[1]	0	16
Total	19	[1]	41	60
Cash Basis Interest Income Recognized
With no related allowance recorded	16	[1]	36	34
With an allowance recorded	0	[1]	0	8
Total	16	[1]	36	42
Mortgage loans, commercial
Recorded Investment
With no related allowance recorded	3,028		3,028	3,242
Total:	3,028		3,028	3,242
Unpaid Principal Balance (Loan Balance Plus Charge Off)
With no related allowance recorded	3,028		3,028	3,242
Total:	3,028		3,028	3,242
Related Allowance	0		0	0
Average Recorded Investment
With no related allowance recorded	3,028	[1]	3,099	3,236
Total	3,028	[1]	3,099	3,236
Interest Income Recognized
With no related allowance recorded	40	[1]	80	133	[1]
Total	40	[1]	80	133
Cash Basis Interest Income Recognized
With no related allowance recorded	33	[1]	63	107
Total	33	[1]	63	107
Mortgage loans, land
Recorded Investment
With no related allowance recorded	173		173	394
With an allowance recorded				0
Total:	173		173	394
Unpaid Principal Balance (Loan Balance Plus Charge Off)
With no related allowance recorded	208		208	438
With an allowance recorded				0
Total:	208		208	438
Related Allowance	0		0	0
Average Recorded Investment
With no related allowance recorded	289	[1]	324	125
With an allowance recorded				110
Total	289	[1]	324	235
Interest Income Recognized
With no related allowance recorded	1	[1]	1	0	[1]
With an allowance recorded				0
Total	1	[1]	1	0
Cash Basis Interest Income Recognized
With no related allowance recorded	1	[1]	1	0
With an allowance recorded				0
Total	1	[1]	1	0
Consumer loans, home equity and second mortgage
Recorded Investment
With no related allowance recorded	538		538	555
Total:	538		538	555
Unpaid Principal Balance (Loan Balance Plus Charge Off)
With no related allowance recorded	538		538	555
Total:	538		538	555
Related Allowance	0		0	0
Average Recorded Investment
With no related allowance recorded	573	[1]	567	581
Total	573	[1]	567	581
Interest Income Recognized
With no related allowance recorded	1	[1]	1	0	[1]
Total	1	[1]	1	0
Cash Basis Interest Income Recognized
With no related allowance recorded	1	[1]	1	0
Total	1	[1]	1	0
Consumer loans, other
Recorded Investment
With no related allowance recorded	8		8	9
With an allowance recorded				0
Total:	8		8	9
Unpaid Principal Balance (Loan Balance Plus Charge Off)
With no related allowance recorded	8		8	9
With an allowance recorded				0
Total:	8		8	9
Related Allowance	0		0	0
Average Recorded Investment
With no related allowance recorded	9	[1]	9	6
With an allowance recorded				7
Total	9	[1]	9	13
Interest Income Recognized
With no related allowance recorded	0	[1]	0	0
With an allowance recorded				0
Total	0	[1]	0	0
Cash Basis Interest Income Recognized
With no related allowance recorded	0	[1]	0
With an allowance recorded				0
Total	0	[1]	0	0
Commercial business loans
Recorded Investment
With no related allowance recorded	233		233	182
With an allowance recorded	294		294	248
Total:	527		527	430
Unpaid Principal Balance (Loan Balance Plus Charge Off)
With no related allowance recorded	236		236	182
With an allowance recorded	294		294	248
Total:	530		530	430
Related Allowance	73		73	38
Average Recorded Investment
With no related allowance recorded	218	[1]	206	176
With an allowance recorded	295		279	370
Total	513	[1]	485	546
Interest Income Recognized
With no related allowance recorded	0	[1]	0	0	[1]
With an allowance recorded	0	[1]	0	0
Total	0	[1]	0	0
Cash Basis Interest Income Recognized
With no related allowance recorded	0	[1]	0	0
With an allowance recorded	0	[1]	0	0
Total	$ 0	[1]	$ 0	$ 0
[1]	For the three months ended March 31, 2021

Loans Receivable And Allowan_10

Loans Receivable And Allowance For Loan Losses: COVID Modifications (Details) $ in Thousands	Mar. 31, 2021USD ($)loan	Sep. 30, 2020USD ($)loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Ratio of loan category to total loans, modified for COVID	100.00%	100.00%
Number of commercial loans modified | loan	8	5
Commercial loans modified for COVID | $	$ 12,884	$ 5,870
Total mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of mortgage loans modified | loan	5	4
Mortgage loans modified for COVID | $	$ 12,691	$ 5,820
Ratio of loan category to total loans, modified for COVID	98.50%	99.10%
Mortgage loans, one-to-four family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of mortgage loans modified | loan		1
Mortgage loans modified for COVID | $		$ 467
Ratio of loan category to total loans, modified for COVID		8.00%
Mortgage loans, commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of mortgage loans modified | loan	4	2
Mortgage loans modified for COVID | $	$ 11,174	$ 3,951
Ratio of loan category to total loans, modified for COVID	86.70%	67.20%
Mortgage loans, construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of mortgage loans modified | loan	1	1
Mortgage loans modified for COVID | $	$ 1,517	$ 1,402
Ratio of loan category to total loans, modified for COVID	11.80%	23.90%
Total consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Ratio of loan category to total loans, modified for COVID	0.10%	0.90%
Number of consumer loans modified | loan	1	1
Consumer loans, modified for COVID | $	$ 18	$ 50
Consumer loans, home equity and second mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Ratio of loan category to total loans, modified for COVID	0.10%	0.90%
Number of consumer loans modified | loan	1	1
Consumer loans, modified for COVID | $	$ 18	$ 50
Commercial business loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Ratio of loan category to total loans, modified for COVID	1.40%
Number of commercial loans modified | loan	2
Commercial loans modified for COVID | $	$ 175

Loans Receivable And Allowan_11

Loans Receivable And Allowance For Loan Losses: Schedule 1 of Troubled debt restructured loans (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Sep. 30, 2020
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loan	$ 3,056	$ 3,071
Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loan	2,864	2,868
Non-Accrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loan	192	203
Mortgage loans, one-to-four family
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loan	479	483
Mortgage loans, one-to-four family | Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loan	479	483
Mortgage loans, one-to-four family | Non-Accrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loan	0	0
Mortgage loans, commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loan	2,385	2,385
Mortgage loans, commercial | Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loan	2,385	2,385
Mortgage loans, commercial | Non-Accrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loan	0	0
Mortgage loans, land
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loan	124	130
Mortgage loans, land | Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loan	0	0
Mortgage loans, land | Non-Accrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loan	124	130
Consumer loans, home equity and second mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loan	68	73
Consumer loans, home equity and second mortgage | Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loan	0	0
Consumer loans, home equity and second mortgage | Non-Accrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loan	$ 68	$ 73

Leases (Details)

Leases (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020	Sep. 30, 2020	[1]	Oct. 01, 2019
Leases [Abstract]
Operating lease right-of-use ("ROU") assets	$ 2,436		$ 2,436		$ 2,587		$ 2,890
Operating lease cost	92	$ 83	185	$ 166
Short-term lease cost	0	0	0	0
Total lease cost	92	83	185	166
Operating cash flows from operating leases	$ 80	$ 80	$ 160	$ 158
Weighted average remaining lease term-operating leases	8 years 9 months 18 days	9 years 8 months 12 days	8 years 9 months 18 days	9 years 8 months 12 days
Weighted average discount rate-operating leases	2.23%	2.22%	2.23%	2.22%
[1]	Derived from audited consolidated financial statements.

Leases - Schedule Of Lease Matu

Leases - Schedule Of Lease Maturities (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Sep. 30, 2020
Leases [Abstract]
Remainder of 2021	$ 167
2022	342
2023	310
2024	313
2025	317
Thereafter	1,322
Total lease payments	2,771
Less imputed interest	272
Total	$ 2,499	$ 2,630

Net Income Per Common Share_ Sc

Net Income Per Common Share: Schedule of Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		6 Months Ended
		Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Earnings Per Share, Basic [Abstract]
Numerator – net income		$ 7,251	$ 5,049	$ 14,541	$ 11,701
Denominator – weighted average common shares outstanding (in shares)		8,331,121	8,344,201	8,322,210	8,342,828
Basic net income per common share (in dollars per share)		$ 0.87	$ 0.61	$ 1.75	$ 1.40
Earnings Per Share, Diluted [Abstract]
Effect of dilutive stock options (in shares)	[1]	113,677	112,458	106,385	123,066
Weighted average common shares and common stock equivalents (in shares)		8,444,798	8,456,659	8,428,595	8,465,894
Diluted net income per common share (in dollars per share)		$ 0.86	$ 0.60	$ 1.73	$ 1.38
Stock Options
Earnings Per Share, Diluted [Abstract]
Antidilutive securities excluded from computation of earnings per share (in shares)		135,590	138,362	136,631	121,497
[1]	For the three and six months ended March 31, 2020, average options to purchase 138,362 and 121,497 shares of common stock, respectively, were outstanding but not included in the computation of diluted net income per shares, because their effect would have been anti-dilutive.

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021		Mar. 31, 2020
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period		$ 193,325	$ 175,653	$ 187,630	[1]	$ 171,067
Balance at end of period		198,543	178,008	198,543		178,008
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	[2]	44	(146)	61		50
Other comprehensive income (loss)	[2]	77	(33)	60		(229)
Balance at end of period	[2]	121	(179)	121		(179)
Accumulated Net Unrealized Investment Gain (Loss) | Available-for-sale Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	[2]	70	(116)	87		90
Other comprehensive income (loss)	[2]	74	(35)	57		(241)
Balance at end of period	[2]	144	(151)	144		(151)
Accumulated Net Unrealized Investment Gain (Loss) | Held-to-maturity Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	[2]	(26)	(30)	(26)		(40)
Other comprehensive income (loss)	[2]	3	2	3		12
Balance at end of period	[2]	$ (23)	$ (28)	$ (23)		$ (28)
[1]	Derived from audited consolidated financial statements.
[2]	All amounts are net of income taxes.

Stock Compensation Plans (Detai

Stock Compensation Plans (Details) - USD ($)	3 Months Ended	6 Months Ended
	Mar. 31, 2021	Mar. 31, 2021	Mar. 31, 2020	Jan. 28, 2020	Jan. 27, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate intrinsic value of options exercised during the period		$ 947,000	$ 628,000
Number of unvested stock options (shares)	158,392	158,392	154,670
Unvested stock options, aggregate grant date fair value	$ 565,000	$ 565,000	$ 584,000
Unvested stock options, aggregate intrinsic value	897,000	$ 897,000
Stock options vested during period (shares)		200	0
Stock options vested during period, aggregate grant date fair value	1,000
Stock options, outstanding, aggregate intrinsic value	2,990,000	$ 2,990,000	$ 1,410,000
Unrecognized compensation expense, non-vested options	$ 507,000	$ 507,000
Unrecognized compensation expense, non-vested options, amortization period (in years)		2 years 1 month 13 days
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)	300,000	300,000
Award vesting percentage		20.00%
Award vesting period (years)		5 years
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Contractual term		10 years
Equity Incentive Plan 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)					352,366
Number of shares available for grant (in shares)	29,676	29,676
Equity Incentive Plan 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)	298,000	298,000		350,000
Equity Incentive Plan 2019 | Employee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)				300,000

Stock Compensation Plans_ Discl

Stock Compensation Plans: Disclosure of Share-based Compensation Arrangements by Share-based Payment Award (Details) - $ / shares	6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Shares:
Options outstanding, beginning of period (shares)	395,349	378,304
Exercised (shares)	(53,564)	(36,375)
Granted (shares)	1,500	1,000
Forfeited (shares)	(4,520)	(8,650)
Options outstanding, end of period (shares)	338,765	334,279
Weighted Average Exercise Price (in dollars per share):
Options outstanding, beginning of period (dollars per share)	$ 18.45	$ 18.15
Exercised (dollars per share)	9.70	10.30
Granted (dollars per share)	19.13	26.50
Forfeited (dollars per share)	27.57	24.84
Options outstanding, end of period (dollars per share)	$ 19.71	$ 18.86

Stock Compensation Plans And St

Stock Compensation Plans And Stock Based Compensation: Schedule of Fair Value Assumptions (Details)	6 Months Ended
	Mar. 31, 2021$ / shares
Share-based Payment Arrangement, Noncash Expense [Abstract]
Expected volatility (percent)	33.00%
Expected term (in years)	5 years
Expected dividend yield (percent)	4.76%
Risk free interest rate (percent)	0.38%
Grant date fair value per share (dollars per share)	$ 3.26

Stock Compensation Plans_ Stock

Stock Compensation Plans: Stock Options by Exercise Price (Details) - Stock Options shares in Thousands	6 Months Ended
	Mar. 31, 2021$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding, Number (shares) | shares	338,765
Options Outstanding, Weighed Average Exercise Price (dollars per share)	$ 19.71
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	6 years 6 months
Options Exercisable, Number (shares) | shares	180,373
Options Exercisable, Weighted Average Exercise Price (dollars per share)	$ 16.83
Options Exercisable, Weighted Average Remaining Contractual Life (Years)	4 years 10 months 24 days
$5.86 - $6.00
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted Average Exercise Price, minimum (dollars per share)	$ 5.86
Weighted Average Exercise Price, maximum (dollars per share)	$ 6
Options Outstanding, Number (shares) | shares	4,200
Options Outstanding, Weighed Average Exercise Price (dollars per share)	$ 5.93
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	1 year 6 months
Options Exercisable, Number (shares) | shares	4,200
Options Exercisable, Weighted Average Exercise Price (dollars per share)	$ 5.93
Options Exercisable, Weighted Average Remaining Contractual Life (Years)	1 year 6 months
$9.00
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted Average Exercise Price, minimum (dollars per share)	$ 9
Options Outstanding, Number (shares) | shares	30,000
Options Outstanding, Weighed Average Exercise Price (dollars per share)	$ 9
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	2 years 7 months 6 days
Options Exercisable, Number (shares) | shares	30,000
Options Exercisable, Weighted Average Exercise Price (dollars per share)	$ 9
Options Exercisable, Weighted Average Remaining Contractual Life (Years)	2 years 7 months 6 days
$10.26 - $10.74
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted Average Exercise Price, minimum (dollars per share)	$ 10.26
Weighted Average Exercise Price, maximum (dollars per share)	$ 10.71
Options Outstanding, Number (shares) | shares	65,575
Options Outstanding, Weighed Average Exercise Price (dollars per share)	$ 10.57
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	4 years
Options Exercisable, Number (shares) | shares	65,575
Options Exercisable, Weighted Average Exercise Price (dollars per share)	$ 10.57
Options Exercisable, Weighted Average Remaining Contractual Life (Years)	4 years
$15.67 - $19.13
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted Average Exercise Price, minimum (dollars per share)	$ 15.67
Weighted Average Exercise Price, maximum (dollars per share)	$ 19.13
Options Outstanding, Number (shares) | shares	104,500
Options Outstanding, Weighed Average Exercise Price (dollars per share)	$ 16.50
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	8 years 2 months 12 days
Options Exercisable, Number (shares) | shares	25,400
Options Exercisable, Weighted Average Exercise Price (dollars per share)	$ 15.67
Options Exercisable, Weighted Average Remaining Contractual Life (Years)	5 years 6 months
$26.50 - $27.14
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted Average Exercise Price, minimum (dollars per share)	$ 26.50
Weighted Average Exercise Price, maximum (dollars per share)	$ 27.14
Options Outstanding, Number (shares) | shares	43,990
Options Outstanding, Weighed Average Exercise Price (dollars per share)	$ 27.13
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	8 years 6 months
Options Exercisable, Number (shares) | shares	8,798
Options Exercisable, Weighted Average Exercise Price (dollars per share)	$ 27.13
Options Exercisable, Weighted Average Remaining Contractual Life (Years)	8 years 6 months
$29.69
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted Average Exercise Price, minimum (dollars per share)	$ 29.69
Options Outstanding, Number (shares) | shares	50,400
Options Outstanding, Weighed Average Exercise Price (dollars per share)	$ 29.69
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	6 years 6 months
Options Exercisable, Number (shares) | shares	30,300
Options Exercisable, Weighted Average Exercise Price (dollars per share)	$ 29.69
Options Exercisable, Weighted Average Remaining Contractual Life (Years)	6 years 6 months
$31.80
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted Average Exercise Price, minimum (dollars per share)	$ 31.80
Options Outstanding, Number (shares) | shares	40,100
Options Outstanding, Weighed Average Exercise Price (dollars per share)	$ 31.80
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	7 years 6 months
Options Exercisable, Number (shares) | shares	16,100
Options Exercisable, Weighted Average Exercise Price (dollars per share)	$ 31.80
Options Exercisable, Weighted Average Remaining Contractual Life (Years)	7 years 6 months

Fair Value Measurements_ Balanc

Fair Value Measurements: Balances of assets and liabilities measured at estimated fair value on a recurring basis (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Sep. 30, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale investment securities, estimated fair value	$ 70,141	$ 58,884
MBS: U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale investment securities, estimated fair value	69,184	57,907
Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale investment securities, estimated fair value	957	977
Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale investment securities, estimated fair value	69,184	57,907
Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale investment securities, estimated fair value	0	0
Recurring | MBS: U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale investment securities, estimated fair value	69,184	57,907
Recurring | Mutual funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale investment securities, estimated fair value	957	977
Recurring | Fair Value, Inputs, Level 1 | MBS: U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale investment securities, estimated fair value	0	0
Recurring | Fair Value, Inputs, Level 1 | Mutual funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale investment securities, estimated fair value	957	977
Recurring | Fair Value, Inputs, Level 2 | MBS: U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale investment securities, estimated fair value	69,184	57,907
Recurring | Fair Value, Inputs, Level 2 | Mutual funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale investment securities, estimated fair value	0	0
Recurring | Fair Value, Inputs, Level 3 | MBS: U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale investment securities, estimated fair value	0	0
Recurring | Fair Value, Inputs, Level 3 | Mutual funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale investment securities, estimated fair value	$ 0	$ 0

Fair Value Measurements_ Bala_2

Fair Value Measurements: Balances of assets measured at estimated fair value on a non-recurring basis, and total losses resulting from estimated fair value adjustments (Details) - Nonrecurring - USD ($) $ in Thousands	Mar. 31, 2021	Sep. 30, 2020
Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, estimated fair value, nonrecurring	$ 0	$ 0
Fair Value, Inputs, Level 1 | Mortgage loans, one-to-four family
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, estimated fair value, nonrecurring		0
Fair Value, Inputs, Level 1 | Commercial business loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, estimated fair value, nonrecurring	0	0
Fair Value, Inputs, Level 1 | Total impaired loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, estimated fair value, nonrecurring	0	0
Fair Value, Inputs, Level 1 | Private label residential
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, estimated fair value, nonrecurring		0
Fair Value, Inputs, Level 1 | OREO and other repossessed assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, estimated fair value, nonrecurring	0	0
Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, estimated fair value, nonrecurring	0	8
Fair Value, Inputs, Level 2 | Mortgage loans, one-to-four family
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, estimated fair value, nonrecurring		0
Fair Value, Inputs, Level 2 | Commercial business loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, estimated fair value, nonrecurring	0	0
Fair Value, Inputs, Level 2 | Total impaired loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, estimated fair value, nonrecurring	0	0
Fair Value, Inputs, Level 2 | Private label residential
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, estimated fair value, nonrecurring		8
Fair Value, Inputs, Level 2 | OREO and other repossessed assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, estimated fair value, nonrecurring	0	0
Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, estimated fair value, nonrecurring	378	1,741
Fair Value, Inputs, Level 3 | Mortgage loans, one-to-four family
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, estimated fair value, nonrecurring		481
Fair Value, Inputs, Level 3 | Commercial business loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, estimated fair value, nonrecurring	221	210
Fair Value, Inputs, Level 3 | Total impaired loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, estimated fair value, nonrecurring	221	691
Fair Value, Inputs, Level 3 | Private label residential
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, estimated fair value, nonrecurring		0
Fair Value, Inputs, Level 3 | OREO and other repossessed assets
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, estimated fair value, nonrecurring	$ 157	$ 1,050

Fair Value Measurements_ Fair V

Fair Value Measurements: Fair Value Measurements, Nonrecurring, Valuation Techniques (Details) - Nonrecurring - Fair Value, Inputs, Level 3 - USD ($) $ in Thousands	Mar. 31, 2021	Sep. 30, 2020
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Assets, estimated fair value, nonrecurring	$ 378	$ 1,741
Impaired loans
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Assets, estimated fair value, nonrecurring	221	691
Impaired loans | Market Approach Valuation Technique
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Assets, estimated fair value, nonrecurring	221	691
OREO and other repossessed assets | Market Approach Valuation Technique
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Assets, estimated fair value, nonrecurring	$ 157	$ 1,050

Fair Value Measurements_ Schedu

Fair Value Measurements: Schedule of estimated fair values of financial instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Sep. 30, 2020
Fair value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other investments, at cost	$ 3,000	$ 3,000	[1]
Recorded Amount
Fair value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	433,342	314,452
CDs held for investment	39,674	65,545
Investment securities	105,649	85,797
Investments in equity securities	957	977
FHLB stock	2,303	1,922
Other investments, at cost	3,000	3,000
Loans held for sale	8,455	4,509
Loans receivable, net	1,030,683	1,013,875
Accrued interest receivable	4,471	4,484
Certificates of deposit	142,781	158,524
FHLB borrowings	10,000	10,000
Accrued interest payable	182	274
Fair Value
Fair value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	433,342	314,452
CDs held for investment	39,674	65,545
Investment securities	107,022	87,734
Investments in equity securities	957	977
FHLB stock	2,303	1,922
Other investments, at cost	3,000	3,000
Loans held for sale	8,714	4,664
Loans receivable, net	1,040,302	1,034,876
Accrued interest receivable	4,471	4,484
Certificates of deposit	144,344	160,921
FHLB borrowings	9,939	10,167
Accrued interest payable	182	274
Fair Value | Fair Value, Inputs, Level 1
Fair value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	433,342	314,452
CDs held for investment	39,674	65,545
Investment securities	8,953	0
Investments in equity securities	957	977
FHLB stock	2,303	1,922
Other investments, at cost	3,000	3,000
Loans held for sale	8,714	4,664
Loans receivable, net	0	0
Accrued interest receivable	4,471	4,484
Certificates of deposit	0	0
FHLB borrowings	0	0
Accrued interest payable	182	274
Fair Value | Fair Value, Inputs, Level 2
Fair value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	0	0
CDs held for investment	0	0
Investment securities	97,572	87,235
Investments in equity securities	0	0
FHLB stock	0	0
Other investments, at cost	0	0
Loans held for sale	0	0
Loans receivable, net	0	0
Accrued interest receivable	0	0
Certificates of deposit	0	0
FHLB borrowings	0	0
Accrued interest payable	0	0
Fair Value | Fair Value, Inputs, Level 3
Fair value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	0	0
CDs held for investment	0	0
Investment securities	497	499
Investments in equity securities	0	0
FHLB stock	0	0
Other investments, at cost	0	0
Loans held for sale	0	0
Loans receivable, net	1,040,302	1,034,876
Accrued interest receivable	0	0
Certificates of deposit	144,344	160,921
FHLB borrowings	9,939	10,167
Accrued interest payable	$ 0	$ 0
[1]	Derived from audited consolidated financial statements.

Revenue from Contract with Cust

Revenue from Contract with Customer (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Deposit Account
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	$ 941	$ 1,078	$ 1,996	$ 2,278
Credit and Debit Card
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	1,237	1,015	2,393	2,109
Asset Management
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	74	47	179	130
Investment Advice
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	$ 3	$ 7	$ 7	$ 13