Timberland Bancorp (TSBK) 10-Q 5 Aug 21 2021 Q3 Quarterly report Financial data

Cover

Cover - $ / shares	9 Months Ended
	Jun. 30, 2021	Aug. 04, 2021	Sep. 30, 2020
Document and Entity Information
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 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)		8,353,969
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	Q3
Amendment Flag	false

Recent Accounting Pronouncement

Recent Accounting Pronouncements	9 Months Ended
	Jun. 30, 2021
Accounting Changes and Error Corrections [Abstract]
Recent Accounting Pronouncements	RECENT ACCOUNTING PRONOUNCEMENTS In June 2016, the FASB issued Accounting Standards Update ("ASU") 2016-13, Financial Instruments - Credit Losses: Measurement of Credit Losses on Financial Instruments , 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 that 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 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 June 30, 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	Jun. 30, 2021	Sep. 30, 2020
Cash and cash equivalents:
Cash and due from financial institutions	$ 25,387	$ 21,877	[1]
Interest-bearing deposits in banks	478,339	292,575	[1]
Total cash and cash equivalents	503,726	314,452	[1]
Certificates of deposit (“CDs”) held for investment (at cost, which      approximates fair value)	31,218	65,545	[1]
Investment securities held to maturity, at amortized cost (estimated fair value of $53,596 and $29,827)	52,314	27,890	[1]
Investment securities available for sale, at fair value	67,491	57,907	[1]
Investments in equity securities, at fair value	960	977
Federal Home Loan Bank of Des Moines (“FHLB”) stock, at cost	2,103	1,922	[1]
Other investments, at cost	3,000	3,000	[1]
Loans held for sale	3,359	4,509	[1]
Loans receivable, net of allowance for loan losses of $13,469 and $13,414	1,001,565	1,013,875	[1]
Premises and equipment, net	22,519	23,035	[1]
Other real estate owned (“OREO”) and other repossessed assets, net	157	1,050	[1]
Accrued interest receivable	4,260	4,484	[1]
Bank owned life insurance (“BOLI”)	22,041	21,596	[1]
Goodwill	15,131	15,131	[1]
Core deposit intangible (“CDI”), net	1,354	1,625
Loan servicing rights, net	3,548	3,095	[1]
Operating lease right-of-use ("ROU") assets	2,360	2,587	[1]
Other assets	3,354	3,298	[1]
Total assets	1,740,460	1,565,978	[1]
Deposits:
Non-interest-bearing demand	495,938	441,889	[1]
Interest-bearing	1,026,714	916,517	[1]
Total deposits	1,522,652	1,358,406	[1]
FHLB borrowings	5,000	10,000	[1]
Operating lease liabilities	2,432	2,630
Other liabilities and accrued expenses	6,884	7,312	[1]
Total liabilities	1,536,968	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; 8,353,969 shares issued and outstanding - June 30, 2021 8,310,793 shares issued and outstanding - September 30, 2020	42,624	42,396	[2]
Retained earnings	160,739	145,173	[2]
Accumulated other comprehensive income	129	61	[2]
Total shareholders’ equity	203,492	187,630	[2]
Total liabilities and shareholders’ equity	$ 1,740,460	$ 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	Jun. 30, 2021	Sep. 30, 2020
Statement of Financial Position [Abstract]
Investments securities held to maturity, estimated fair value	$ 53,596	$ 29,827
Allowance for loan losses	$ 13,469	$ 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)	8,353,969	8,310,793
Common stock shares outstanding (shares)	8,353,969	8,310,793

Consolidated Statements of Inco

Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Interest and dividend income
Loans receivable and loans held for sale	$ 13,298	$ 12,871	$ 39,406	$ 38,457
Investment securities	292	345	877	1,274
Dividends from mutual funds, FHLB stock and other investments	28	23	83	95
Interest-bearing deposits in banks and CDs	247	429	816	2,164
Total interest and dividend income	13,865	13,668	41,182	41,990
Interest expense
Deposits	690	1,159	2,358	3,591
FHLB borrowings	18	29	76	37
Total interest expense	708	1,188	2,434	3,628
Net interest income	13,157	12,480	38,748	38,362
Provision for loan losses	0	1,000	0	3,200
Net interest income after provision for loan losses	13,157	11,480	38,748	35,162
Non-interest income
Net recoveries on investment securities	6	6	14	113
BOLI net earnings	150	148	445	442
Gain on sales of loans, net	1,607	2,141	5,367	3,829
Valuation (allowance) recovery on loan servicing rights, net	(179)	0	23	(23)
Other, net	316	517	925	1,416
Total non-interest income, net	4,266	4,855	13,711	12,473
Non-interest expense
Salaries and employee benefits	4,554	4,570	13,944	13,913
Premises and equipment	995	1,077	2,949	2,914
Loss (gain) on sales/dispositions of premises and equipment, net	0	4	0	(98)
Advertising	162	150	472	493
OREO and other repossessed assets, net	5	11	(89)	60
ATM and debit card interchange transaction fees	464	405	1,341	1,203
Postage and courier	141	137	428	416
State and local taxes	284	255	822	705
Professional fees	262	286	675	766
Federal Deposit Insurance Corporation ("FDIC") insurance	100	143	301	116
Loan administration and foreclosure	148	191	319	358
Data processing and telecommunications	627	603	1,868	1,702
Deposit operations	289	245	818	836
Amortization of CDI	90	101	271	304
Other	492	483	1,455	1,631
Total non-interest expense, net	8,613	8,661	25,574	25,319
Income before income taxes	8,810	7,674	26,885	22,316
Provision for income taxes	1,786	1,463	5,320	4,404
Net income	$ 7,024	$ 6,211	$ 21,565	$ 17,912
Net income per common share
Basic (in dollars per share)	$ 0.84	$ 0.75	$ 2.59	$ 2.15
Diluted (in dollars per share)	$ 0.83	$ 0.74	$ 2.55	$ 2.12
Weighted average common shares outstanding
Basic (in shares)	8,365,350	8,309,947	8,336,590	8,331,908
Diluted (in shares)	8,465,393	8,378,983	8,440,861	8,437,030
Deposit Account
Non-interest income
Revenue from contract with customer	$ 948	$ 858	$ 2,943	$ 3,136
Credit and Debit Card
Non-interest income
Revenue from contract with customer	1,363	1,069	3,755	3,178
Asset Management
Non-interest income
Revenue from contract with customer	64	81	243	211
Servicing Income On Loans Sold
Non-interest income
Revenue from contract with customer	$ (9)	$ 35	$ (4)	$ 171

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Comprehensive income
Net income	$ 7,024	$ 6,211	$ 21,565	$ 17,912
Unrealized holding gain (loss) on investment securities available for sale, net of income taxes of $0, $(41),$16 and $(23), respectively	1	154	58	(87)
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 $2, $0, $1 and $3, respectively	7	1	10	13
Total other comprehensive income (loss), net of income taxes	8	155	68	(74)
Total comprehensive income	$ 7,032	$ 6,366	$ 21,633	$ 17,838

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Comprehensive Income [Abstract]
Unrealized holding loss on investment securities available for sale, tax	$ 0	$ (41)	$ 16	$ (23)
Accretion of OTTI on investment securities held to maturity, tax	$ 2	$ 0	$ 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	17,912					17,912
Other comprehensive income (loss)	(74)						(74)
Repurchase of common stock (in shares)				(56,601)
Repurchase of common stock	$ (1,238)			$ (1,238)
Exercise of stock options (in shares)	37,975			37,975
Exercise of stock options	$ 391			$ 391
Common stock dividends	(5,421)					(5,421)
Earned ESOP shares, net of income taxes	31			$ 31
Stock option compensation expense			$ 138		$ 138
Balance at end of period (in shares) at Jun. 30, 2020				8,310,793
Balance at end of period at Jun. 30, 2020	182,806			$ 42,352		140,478	(24)	[1]
Balance at beginning of period (in shares) at Mar. 31, 2020				8,309,193
Balance at beginning of period at Mar. 31, 2020	178,008			$ 42,258		135,929	(179)	[1]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	6,211					6,211
Other comprehensive income (loss)	155						155
Exercise of stock options (in shares)				1,600
Exercise of stock options	17			$ 17
Common stock dividends	(1,662)					(1,662)
Earned ESOP shares, net of income taxes	31			$ 31
Stock option compensation expense			46		46
Balance at end of period (in shares) at Jun. 30, 2020				8,310,793
Balance at end of period at Jun. 30, 2020	182,806			$ 42,352		140,478	(24)	[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	21,565					21,565
Other comprehensive income (loss)	68						68
Repurchase of common stock (in shares)				(19,588)
Repurchase of common stock	$ (527)			$ (527)
Exercise of stock options (in shares)	62,764			62,764
Exercise of stock options	$ 616			$ 616
Common stock dividends	(5,999)					(5,999)
Stock option compensation expense			139		139
Balance at end of period (in shares) at Jun. 30, 2021				8,353,969
Balance at end of period at Jun. 30, 2021	203,492			$ 42,624		160,739	129	[1]
Balance at beginning of period (in shares) at Mar. 31, 2021				8,361,457
Balance at beginning of period at Mar. 31, 2021	198,543			$ 42,949		155,473	121	[1]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	7,024					7,024
Other comprehensive income (loss)	8						8
Repurchase of common stock (in shares)				(16,688)
Repurchase of common stock	(469)			$ (469)
Exercise of stock options (in shares)				9,200
Exercise of stock options	97			$ 97
Common stock dividends	(1,758)					(1,758)
Stock option compensation expense			$ 47		$ 47
Balance at end of period (in shares) at Jun. 30, 2021				8,353,969
Balance at end of period at Jun. 30, 2021	$ 203,492			$ 42,624		$ 160,739	$ 129	[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		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Common Stock
Dividends paid per common share (in dollars per share)	$ 0.21	$ 0.20	$ 0.72	$ 0.65

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2021		Jun. 30, 2020
Cash flows from operating activities
Net income	$ 21,565		$ 17,912
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for loan losses	0		3,200
Depreciation	1,174		1,163
Deferred income taxes	57		0
Accretion of discount on purchased loans	(291)		(423)
Amortization of CDI	271		304
Earned ESOP shares	0		31
Stock option compensation expense	139		138
Net recoveries on investment securities	(14)		(113)
Change in fair value of investments in equity securities	17		(19)
Accretion of discounts and premiums on securities	49		138
Gain on sales of OREO and other repossessed assets, net	(92)		(33)
Provision for OREO losses	0		25
Gain on sales of loans, net	(5,367)		(3,829)
Gain on sales/disposition of premises and equipment, net	0		98
Loans originated for sale	(119,669)		(114,073)
Proceeds from sales of loans	126,186		114,136
Amortization of loan servicing rights	817		599
Valuation adjustment on servicing rights	(23)		23
BOLI net earnings	(445)		(442)
Increase (decrease) in deferred loan origination fees	(97)		3,925
Net change in accrued interest receivable and other assets, and other liabilities and accrued expenses	(1,552)		(1,115)
Net cash provided by operating activities	22,725		21,449
Cash flows from investing activities
Net decrease in CDs held for investment	34,327		6,332
Purchase of investment securities held to maturity	(33,797)		(9,754)
Purchase of investment securities available for sale	(18,698)		(23,366)
Proceeds from maturities and prepayments of investment securities held to maturity	9,524		10,480
Proceeds from maturities and prepayments of investment securities available for sale	9,013		3,856
Purchase of FHLB stock	(181)		(485)
Decrease (increase) in loans receivable, net	12,698		(132,799)
Additions to premises and equipment	(658)		(1,661)
Proceeds from sales of premises and equipment	0		307
Proceeds from sales of OREO and other repossessed assets	985		225
Net cash provided by (used in) investing activities	13,213		(146,865)
Cash flows from financing activities
Net increase in deposits	164,246		250,313
Proceeds from (repayments of) FHLB borrowings	(5,000)
Proceeds from (repayments of) FHLB borrowings			10,000
Proceeds from exercise of stock options	616		391
Repurchase of common stock	(527)		(1,238)
Payment of dividends	(5,999)		(5,421)
Net cash provided by financing activities	153,336		254,045
Net increase in cash and cash equivalents	189,274		128,629
Cash and cash equivalents, at beginning of period	314,452	[1]	143,015
Cash and cash equivalents, at end of period	503,726		271,644
Supplemental disclosure of cash flow information
Income taxes paid	4,642		5,165
Interest paid	2,554		3,648
Supplemental disclosure of non-cash investing activities
Other comprehensive income (loss) related to investment securities	68		(74)
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	9 Months Ended
	Jun. 30, 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 nine months ended June 30, 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’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 under the operating name, "Timberland Bank." (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 June 30, 2021 presentation with no change to previously reported net income or total shareholders’ equity.

Investment Securities

Investment Securities	9 Months Ended
	Jun. 30, 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 June 30, 2021 and September 30, 2020 (dollars in thousands): Amortized Gross Gross Estimated June 30, 2021 Held to maturity Mortgage-backed securities ("MBS"): U.S. government agencies $ 24,508 $ 1,074 $ (19) $ 25,563 Private label residential 8,432 300 (22) 8,710 U.S. Treasury and U.S. government agency securities 18,874 1 (59) 18,816 Bank issued trust preferred securities 500 7 — 507 Total $ 52,314 $ 1,382 $ (100) $ 53,596 Available for sale MBS: U.S. government agencies $ 67,306 $ 271 $ (86) $ 67,491 Total $ 67,306 $ 271 $ (86) $ 67,491 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 June 30, 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 $ 4,269 $ (19) 5 $ 16 $ — 3 $ 4,285 $ (19) Private label residential 8,223 (22) 2 1 — 1 8,224 (22) U.S. Treasury and U.S. government agency securities 8,954 (59) 3 — — — 8,954 (59) Total $ 21,446 $ (100) 10 $ 17 $ — 4 $ 21,463 $ (100) Available for sale MBS: U.S. government agencies $ 26,667 $ (86) 15 $ 926 $ — 1 $ 27,593 $ (86) Total $ 26,667 $ (86) 15 $ 926 $ — 1 $ 27,593 $ (86) 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 June 30, 2021, management does not have the intent to sell any of the securities classified as available for sale for which 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 June 30, 2021 and 2020: Range Weighted Minimum Maximum Average June 30, 2021 Constant prepayment rate 6.00 % 15.00 % 12.84 % Collateral default rate 1.83 % 21.58 % 13.09 % Loss severity rate — % 14.53 % 4.82 % June 30, 2020 Constant prepayment rate 6.00 % 15.00 % 9.21 % Collateral default rate 2.00 % 19.96 % 10.21 % Loss severity rate — % 12.41 % 2.48 % The following table presents the OTTI recoveries for the three and nine months ended June 30, 2021 and 2020 (dollars in thousands): Three Months Ended Three Months Ended Held To Held To Total recoveries $ 6 $ 6 Net recoveries recognized in earnings (1) $ 6 $ 6 Nine Months Ended Nine Months Ended Held To Held To Total recoveries $ 14 $ 113 Net recoveries recognized in earnings (1) $ 14 $ 113 _________________ (1) 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 nine months ended June 30, 2021 and 2020 (dollars in thousands): Nine Months Ended 2021 2020 Beginning balance of credit loss $ 885 $ 1,071 Additions: Additional increases to the amount related to credit loss for which OTTI was previously recognized — 2 Subtractions: Realized losses previously recorded as credit losses (5) (65) Recovery of prior credit loss (14) (112) Ending balance of credit loss $ 866 $ 896 During the nine months ended June 30, 2021, the Company recorded a $5,000 net realized loss (as a result of investment securities being deemed worthless) on 12 held to maturity investment securities, all of which had been recognized previously as a credit loss. During the nine months ended June 30, 2020, the Company recorded a $65,000 net realized loss (as a result of investment securities being deemed worthless) on 9 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 $98.62 million and $81.03 million at June 30, 2021 and September 30, 2020, respectively. The contractual maturities of debt securities at June 30, 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 $ — $ — $ 926 $ 926 Due after one year to five years 11,226 11,268 2,654 2,653 Due after five years to ten years 23,556 24,064 18,247 18,285 Due after ten years 17,532 18,264 45,479 45,627 Total $ 52,314 $ 53,596 $ 67,306 $ 67,491

Goodwill and CDI

Goodwill and CDI	9 Months Ended
	Jun. 30, 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 2021 goodwill impairment test during the quarter ended June 30, 2021. Based on this assessment, the Company determined that it is not "more likely than not" that the Company's fair value is less than its carrying amount, and, therefore goodwill was determined not to be impaired at May 31, 2021. 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 June 30, 2021, management believes that there have been no events or changes in the circumstances since May 31, 2021 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 June 30, 2021 and September 30, 2020 remained unchanged at $15.13 million.

Loans Receivable And Allowance

Loans Receivable And Allowance For Loan Losses	9 Months Ended
	Jun. 30, 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 June 30, 2021 and September 30, 2020 (dollars in thousands): June 30, September 30, Amount Percent Amount Percent Mortgage loans: One- to four-family (1) $ 119,173 10.7 % $ 118,580 10.5 % Multi-family 94,756 8.5 85,053 7.5 Commercial 458,889 41.3 453,574 40.0 Construction - custom and owner/builder 105,484 9.5 129,572 11.4 Construction - speculative one- to four-family 18,038 1.6 14,592 1.3 Construction - commercial 43,879 3.9 33,144 2.9 Construction - multi-family 45,624 4.1 34,476 3.0 Construction - land development 4,434 0.4 7,712 0.7 Land 18,289 1.6 25,571 2.3 Total mortgage loans 908,566 81.6 902,274 79.6 Consumer loans: Home equity and second mortgage 31,891 2.9 32,077 2.8 Other 2,725 0.2 3,572 0.3 Total consumer loans 34,616 3.1 35,649 3.1 Commercial loans: Commercial business 72,890 6.7 69,540 6.1 U.S. Small Business Administration ("SBA") Paycheck Protection Program ("PPP") loans 95,633 8.6 126,820 11.2 Total commercial loans 168,523 15.3 % 196,360 17.3 Total loans receivable 1,111,705 100.0 % 1,134,283 100.0 % Less: Undisbursed portion of construction loans in process 90,332 100,558 Deferred loan origination fees, net 6,339 6,436 Allowance for loan losses 13,469 13,414 Subtotal 110,140 120,408 Loans receivable, net $ 1,001,565 $ 1,013,875 _____________________________ (1) Does not include one- to four-family loans held for sale totaling $3,359 and $4,509 at June 30, 2021 and September 30, 2020, respectively. Loans receivable at June 30, 2021 and September 30, 2020 are reported net of unamortized discounts totaling $499,000 and $790,000, respectively. Allowance for Loan Losses The following tables set forth information for the three and nine months ended June 30, 2021 and 2020 regarding activity in the allowance for loan losses by portfolio segment (dollars in thousands): Three Months Ended June 30, 2021 Beginning Provision for Charge- Recoveries Ending Mortgage loans: One- to four-family $ 1,151 $ (9) $ — $ — $ 1,142 Multi-family 784 26 — — 810 Commercial 7,238 (277) — — 6,961 Construction – custom and owner/builder 695 (91) — — 604 Construction – speculative one- to four-family 148 36 — — 184 Construction – commercial 714 44 — — 758 Construction – multi-family 323 125 — — 448 Construction – land development 19 12 — — 31 Land 407 (58) — 35 384 Consumer loans: Home equity and second mortgage 552 (1) — — 551 Other 56 — — — 56 Commercial business loans 1,347 193 — — 1,540 Total $ 13,434 $ — $ — $ 35 $ 13,469 Nine Months Ended June 30, 2021 Beginning Provision for Charge- Recoveries Ending Mortgage loans: One-to four-family $ 1,163 $ (21) $ — $ — $ 1,142 Multi-family 718 92 — — 810 Commercial 7,144 (183) — — 6,961 Construction – custom and owner/builder 832 (228) — — 604 Construction – speculative one- to four-family 158 26 — — 184 Construction – commercial 420 338 — — 758 Construction – multi-family 238 210 — — 448 Construction – land development 133 (102) — — 31 Land 572 (233) — 45 384 Consumer loans: Home equity and second mortgage 593 (42) — — 551 Other 71 (18) (1) 4 56 Commercial business loans 1,372 161 (2) 9 1,540 Total $ 13,414 $ — $ (3) $ 58 $ 13,469 Three Months Ended June 30, 2020 Beginning Provision for Charge- Recoveries Ending Mortgage loans: One- to four-family $ 1,149 $ 14 $ — $ — $ 1,163 Multi-family 595 70 — — 665 Commercial 5,762 957 — — 6,719 Construction – custom and owner/builder 697 110 — — 807 Construction – speculative one- to four-family 204 (40) — — 164 Construction – commercial 423 (119) — — 304 Construction – multi-family 394 (76) — — 318 Construction – land development 80 27 — — 107 Land 678 (41) — 5 642 Consumer loans: Home equity and second mortgage 656 (24) — — 632 Other 78 (4) (1) — 73 Commercial business loans 1,174 126 — — 1,300 Total $ 11,890 $ 1,000 $ (1) $ 5 $ 12,894 Nine Months Ended June 30, 2020 Beginning Provision for Charge- Recoveries Ending Mortgage loans: One-to four-family $ 1,167 $ (7) $ — $ 3 $ 1,163 Multi-family 481 184 — — 665 Commercial 4,154 2,560 — 5 6,719 Construction – custom and owner/builder 755 47 — 5 807 Construction – speculative one- to four-family 212 (48) — — 164 Construction – commercial 338 (34) — — 304 Construction – multi-family 375 (57) — — 318 Construction – land development 67 40 — — 107 Land 697 (70) — 15 642 Consumer loans: Home equity and second mortgage 623 9 — — 632 Other 99 (17) (12) 3 73 Commercial business loans 722 593 (15) — 1,300 Total $ 9,690 $ 3,200 $ (27) $ 31 $ 12,894 The following tables present information on the loans evaluated individually and collectively for impairment in the allowance for loan losses by portfolio segment at June 30, 2021 and September 30, 2020 (dollars in thousands): Allowance for Loan Losses Recorded Investment in Loans Individually Collectively Total Individually Collectively Total June 30, 2021 Mortgage loans: One- to four-family $ — $ 1,142 $ 1,142 $ 411 $ 118,762 $ 119,173 Multi-family — 810 810 — 94,756 94,756 Commercial — 6,961 6,961 2,753 456,136 458,889 Construction – custom and owner/builder — 604 604 — 57,309 57,309 Construction – speculative one- to four-family — 184 184 — 9,263 9,263 Construction – commercial — 758 758 — 37,007 37,007 Construction – multi-family — 448 448 — 22,397 22,397 Construction – land development — 31 31 — 1,151 1,151 Land — 384 384 169 18,120 18,289 Consumer loans: Home equity and second mortgage — 551 551 545 31,346 31,891 Other — 56 56 18 2,707 2,725 Commercial business loans 171 1,369 1,540 513 72,377 72,890 SBA PPP loans — — — — 95,633 95,633 Total $ 171 $ 13,298 $ 13,469 $ 4,409 $ 1,016,964 $ 1,021,373 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 June 30, 2021 and September 30, 2020 (dollars in thousands): 30–59 60-89 Non- Past Due Total Current Total June 30, 2021 Mortgage loans: One- to four-family $ — $ 183 $ 411 $ — $ 594 $ 118,579 $ 119,173 Multi-family — — — — — 94,756 94,756 Commercial — 509 373 — 882 458,007 458,889 Construction – custom and owner/builder — — — — — 57,309 57,309 Construction – speculative one- to four-family — — — — — 9,263 9,263 Construction – commercial — — — — — 37,007 37,007 Construction – multi-family — — — — — 22,397 22,397 Construction – land development — — — — — 1,151 1,151 Land — 204 169 — 373 17,916 18,289 Consumer loans: Home equity and second mortgage 17 — 545 — 562 31,329 31,891 Other — — 18 — 18 2,707 2,725 Commercial business loans — — 513 — 513 72,377 72,890 SBA PPP loans — — — — — 95,633 95,633 Total $ 17 $ 896 $ 2,029 $ — $ 2,942 $ 1,018,431 $ 1,021,373 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 June 30, 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 June 30, 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 June 30, 2021 and September 30, 2020 (dollars in thousands): Loan Grades June 30, 2021 Pass Watch Special Substandard Total Mortgage loans: One- to four-family $ 118,083 $ 132 $ 540 $ 418 $ 119,173 Multi-family 94,756 — — — 94,756 Commercial 440,143 10,335 7,595 816 458,889 Construction – custom and owner/builder 56,471 838 — — 57,309 Construction – speculative one- to four-family 9,263 — — — 9,263 Construction – commercial 35,490 — 1,517 — 37,007 Construction – multi-family 22,397 — — — 22,397 Construction – land development 1,114 — — 37 1,151 Land 16,983 567 570 169 18,289 Consumer loans: Home equity and second mortgage 31,193 35 — 663 31,891 Other 2,676 31 — 18 2,725 Commercial business loans 72,296 — 38 556 72,890 SBA PPP loans 95,633 — — — 95,633 Total $ 996,498 $ 11,938 $ 10,260 $ 2,677 $ 1,021,373 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 June 30, 2021 and for the three and nine 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 $ 411 $ 454 $ — $ 653 $ 717 $ 8 $ 50 $ 8 $ 45 Commercial 2,753 2,753 — 2,891 3,013 39 120 32 95 Land 169 169 — 171 285 1 2 1 2 Consumer loans: Home equity and second mortgage 545 545 — 542 561 1 1 1 1 Other 17 17 — 13 11 — — — — Commercial business loans 220 222 — 227 209 — — — — Subtotal 4,115 4,160 — 4,497 4,796 49 173 42 143 With an allowance recorded: Mortgage loans: One- to four-family — — — — 121 — — — — Commercial business loans 294 294 171 295 283 — — — — Subtotal 294 294 171 295 404 — — — — Total: Mortgage loans: One- to four-family 411 454 — 653 838 8 50 8 45 Commercial 2,753 2,753 — 2,891 3,013 39 120 32 95 Land 169 169 — 171 285 1 2 1 2 Consumer loans: Home equity and second mortgage 545 545 — 542 561 1 1 1 1 Other 17 17 — 13 11 — — — — Commercial business loans 514 516 171 521 492 — — — — Total $ 4,409 $ 4,454 $ 171 $ 4,791 $ 5,200 $ 49 $ 173 $ 42 $ 143 ______________________________________________ (1) For the three months ended June 30, 2021. (2) For the nine months ended June 30, 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 $2.57 million and $3.07 million in TDRs included in impaired loans at June 30, 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 June 30, 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 nine months ended June 30, 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. Nearly all of these borrowers had resumed making payments as of June 30, 2021, and as of that date, only one loan with a balance of $1.70 million remained on deferral status under a COVID-19 loan modification forbearance agreement. 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 June 30, 2021 and September 30, 2020 (dollars in thousands): COVID-19 Loan Modifications June 30, 2021 Mortgage loans Count Balance Percent Commercial 1 $ 1,703 100.0 % Total mortgage loans 1 1,703 100.0 Total COVID-19 Modifications 1 $ 1,703 100.0 % 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 June 30, 2021 and September 30, 2020 (dollars in thousands): June 30, 2021 Accruing Non- Total Mortgage loans: Commercial $ 2,380 $ — $ 2,380 Land — 121 121 Consumer loans: Home equity and second mortgage — 66 66 Total $ 2,380 $ 187 $ 2,567 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 nine months ended June 30, 2021 or during the year ended September 30, 2020.

Leases

Leases	9 Months Ended
	Jun. 30, 2021
Leases [Abstract]
Leases	LEASES The Company adopted the Financial Accounting Standard Board's ("FASB's") Accounting Standards Codification ("ASC") 842, Leases ("ASC 842") on October 1, 2019 and began recording operating lease liabilities and operating lease ROU assets in 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 sixteen 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 nine months ended June 30, 2021 and 2020 (dollars in thousands): Three Months Ended June 30, 2021 Nine Months Ended June 30, 2021 Lease cost: Operating lease cost $ 92 $ 277 Short-term lease cost — — Total lease cost $ 92 $ 277 Three Months Ended June 30, 2020 Nine Months Ended June 30, 2020 Lease cost: Operating lease cost $ 118 $ 284 Short-term lease cost — — Total lease cost $ 118 $ 284 The following table provides supplemental information to operating leases at or for the three and nine months ended June 30, 2021 and 2020 (dollars in thousands): At or For Three Months Ended June 30, 2021 At or For Nine Months Ended June 30, 2021 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 80 $ 240 Weighted average remaining lease term-operating leases 8.6 years 8.6 years Weighted average discount rate-operating leases 2.23 % 2.23 % At or For Three Months Ended June 30, 2020 At or For Nine Months Ended June 30, 2020 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 80 $ 239 Weighted average remaining lease term-operating leases 9.5 years 9.5 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 June 30, 2021 for future fiscal years are as follows (dollars in thousands): Remainder of 2021 $ 86 2022 342 2023 310 2024 313 2025 317 Thereafter 1,322 Total lease payments 2,690 Less imputed interest 258 Total $ 2,432

Net Income Per Common Share

Net Income Per Common Share	9 Months Ended
	Jun. 30, 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 nine months ended June 30, 2021 and 2020 is as follows (dollars in thousands, except per share amounts): Three Months Ended June 30, Nine Months Ended June 30, 2021 2020 2021 2020 Basic net income per common share computation Numerator – net income $ 7,024 $ 6,211 $ 21,565 $ 17,912 Denominator – weighted average common shares outstanding 8,365,350 8,309,947 8,336,590 8,331,908 Basic net income per common share $ 0.84 $ 0.75 $ 2.59 $ 2.15 Diluted net income per common share computation Numerator – net income $ 7,024 $ 6,211 $ 21,565 $ 17,912 Denominator – weighted average common shares outstanding 8,365,350 8,309,947 8,336,590 8,331,908 Effect of dilutive stock options (1) 100,043 69,036 104,271 105,122 Weighted average common shares outstanding - assuming dilution 8,465,393 8,378,983 8,440,861 8,437,030 Diluted net income per common share $ 0.83 $ 0.74 $ 2.55 $ 2.12 ____________________________________________ (1) For the three and nine months ended June 30, 2021, average options to purchase 134,365 and 135,876 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 nine months ended June 30, 2020, average options to purchase 135,212 and 126,052 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)	9 Months Ended
	Jun. 30, 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 nine months ended June 30, 2021 and 2020 are as follows (dollars in thousands): Three Months Ended June 30, 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 $ 144 $ (23) $ 121 Other comprehensive income 1 7 8 Balance of AOCI at the end of period $ 145 $ (16) $ 129 Nine Months Ended June 30, 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 58 10 68 Balance of AOCI at the end of period $ 145 $ (16) $ 129 Three Months Ended June 30, 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 $ (151) $ (28) $ (179) Other comprehensive income 154 1 155 Balance of AOCI at the end of period $ 3 $ (27) $ (24) Nine Months Ended June 30, 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 (87) 13 (74) Balance of AOCI at the end of period $ 3 $ (27) $ (24) __________________________ (1) All amounts are net of income taxes.

Stock Compensation Plans

Stock Compensation Plans	9 Months Ended
	Jun. 30, 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 June 30, 2021 and 2020, there were no unvested restricted stock awards. There were no restricted stock grants awarded during the nine months ended June 30, 2021 and 2020. Stock option activity for the nine months ended June 30, 2021 and 2020 is summarized as follows: Nine Months Ended June 30, 2021 Nine Months Ended June 30, 2020 Number of Shares Weighted Number of Shares Weighted Options outstanding, beginning of period 395,349 $ 18.45 378,304 $ 18.15 Exercised (62,764) 9.82 (37,975) 10.31 Granted 1,500 19.13 1,000 26.50 Forfeited (5,270) 26.91 (9,050) 25.10 Options outstanding, end of period 328,815 $ 19.96 332,279 $ 18.88 The fair value of stock options is determined using the Black-Scholes valuation model. The weighted average assumptions for options granted during the nine months ended June 30, 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 nine months ended June 30, 2021 and 2020 was $1.12 million and $640,000, respectively. At June 30, 2021, there were 157,892 unvested options with an aggregate grant date fair value of $564,000, all of which the Company assumes will vest. The aggregate intrinsic value of unvested options at June 30, 2021 was $928,000. There were 200 options vested during the nine months ended June 30, 2021 with a total fair value of $1,000. At June 30, 2020, there were 141,570 unvested options with an aggregate grant date fair value of $559,000. There were 13,100 options that vested during the nine months ended June 30, 2020. Additional information regarding options outstanding at June 30, 2021 is as follows: Options Outstanding Options Exercisable Range of Number Weighted Weighted Number Weighted Weighted $5.86 - 6.00 4,000 $ 5.93 1.3 4,000 $ 5.93 1.3 9.00 27,000 9.00 2.3 27,000 9.00 2.3 10.26 - 10.71 60,575 10.57 3.7 60,575 10.57 3.7 15.67 - 19.13 103,000 16.50 7.9 24,400 16.50 5.3 26.50 - 27.14 43,990 27.13 8.3 8,798 27.13 8.3 29.69 50,250 29.69 6.3 30,150 29.69 6.3 31.80 40,000 31.80 7.3 16,000 31.80 7.3 328,815 $ 19.96 6.3 170,923 $ 17.15 4.7 The aggregate intrinsic value of options outstanding at June 30, 2021 and 2020 was $2.91 million and $1.38 million , respectively. As of June 30, 2021, unrecognized compensation cost related to unvested stock options was $461,000, which is expected to be recognized over a weighted average life of 2.03 years.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Jun. 30, 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 June 30, 2021 and September 30, 2020. The Company's assets measured at estimated fair value on a recurring basis at June 30, 2021 and September 30, 2020 were as follows (dollars in thousands): June 30, 2021 Estimated Fair Value Level 1 Level 2 Level 3 Total Available for sale investment securities MBS: U.S. government agencies $ — $ 67,491 $ — $ 67,491 Investments in equity securities Mutual funds 960 — — 960 Total $ 960 $ 67,491 $ — $ 68,451 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 nine months ended June 30, 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 June 30, 2021 (dollars in thousands): Estimated Fair Value Level 1 Level 2 Level 3 Impaired loans: Commercial business loans $ — $ — $ 123 Total impaired loans — — 123 Investment securities – held to maturity: MBS - private label residential — 9 — OREO and other repossessed assets — — 157 Total $ — $ 9 $ 280 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 June 30, 2021 (dollars in thousands): Estimated Valuation Unobservable Input(s) Range Impaired loans $ 123 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 June 30, 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 June 30, 2021 and September 30, 2020 (dollars in thousands): June 30, 2021 Fair Value Measurements Using: Recorded Estimated Fair Value Financial assets Cash and cash equivalents $ 503,726 $ 503,726 $ 503,726 $ — $ — CDs held for investment 31,218 31,218 31,218 — — Investment securities 119,805 121,087 18,816 102,271 — Investments in equity securities 960 960 960 — — FHLB stock 2,103 2,103 2,103 — — Other investments 3,000 3,000 3,000 — — Loans held for sale 3,359 3,467 3,467 — — Loans receivable, net 1,001,565 1,022,389 — — 1,022,389 Accrued interest receivable 4,260 4,260 4,260 — — Financial liabilities Certificates of deposit 139,965 141,225 — — 141,225 FHLB borrowings 5,000 5,039 — — 5,039 Accrued interest payable 154 154 154 — — 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	9 Months Ended
	Jun. 30, 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 June 30, 2021, the Company recognized $948,000 in service charges on deposits, $1.36 million in ATM and debit card interchange fees, $64,000 in escrow fees, and $8,000 in fee income from non-deposit investment sales, all considered within the scope of ASC 606. For the nine months ended June 30, 2021, the Company recognized $2.94 million in service charges on deposits, $3.76 million in ATM and debit card interchange fees, $243,000 in escrow fees, and $14,000 in fee income from non-deposit investment sales, all considered within the scope of ASC 606. For the three months ended June 30, 2020, the Company recognized $858,000 in service charges on deposits, $1.07 million in ATM and debit card interchange fees, $81,000 in escrow fees, and $0 in fee income from non-deposit investment sales, all considered within the scope of ASC 606. For the nine months ended June 30, 2020, the Company recognized $3.14 million in service charges on deposits, $3.18 million in ATM and debit card interchange fees, $211,000 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)	9 Months Ended
	Jun. 30, 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 nine months ended June 30, 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’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 under the operating name, "Timberland Bank."
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 June 30, 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 June 30, 2021, the Company recognized $948,000 in service charges on deposits, $1.36 million in ATM and debit card interchange fees, $64,000 in escrow fees, and $8,000 in fee income from non-deposit investment sales, all considered within the scope of ASC 606. For the nine months ended June 30, 2021, the Company recognized $2.94 million in service charges on deposits, $3.76 million in ATM and debit card interchange fees, $243,000 in escrow fees, and $14,000 in fee income from non-deposit investment sales, all considered within the scope of ASC 606. For the three months ended June 30, 2020, the Company recognized $858,000 in service charges on deposits, $1.07 million in ATM and debit card interchange fees, $81,000 in escrow fees, and $0 in fee income from non-deposit investment sales, all considered within the scope of ASC 606. For the nine months ended June 30, 2020, the Company recognized $3.14 million in service charges on deposits, $3.18 million in ATM and debit card interchange fees, $211,000 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)	9 Months Ended
	Jun. 30, 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 June 30, 2021 and September 30, 2020 (dollars in thousands): Amortized Gross Gross Estimated June 30, 2021 Held to maturity Mortgage-backed securities ("MBS"): U.S. government agencies $ 24,508 $ 1,074 $ (19) $ 25,563 Private label residential 8,432 300 (22) 8,710 U.S. Treasury and U.S. government agency securities 18,874 1 (59) 18,816 Bank issued trust preferred securities 500 7 — 507 Total $ 52,314 $ 1,382 $ (100) $ 53,596 Available for sale MBS: U.S. government agencies $ 67,306 $ 271 $ (86) $ 67,491 Total $ 67,306 $ 271 $ (86) $ 67,491 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 June 30, 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 $ 4,269 $ (19) 5 $ 16 $ — 3 $ 4,285 $ (19) Private label residential 8,223 (22) 2 1 — 1 8,224 (22) U.S. Treasury and U.S. government agency securities 8,954 (59) 3 — — — 8,954 (59) Total $ 21,446 $ (100) 10 $ 17 $ — 4 $ 21,463 $ (100) Available for sale MBS: U.S. government agencies $ 26,667 $ (86) 15 $ 926 $ — 1 $ 27,593 $ (86) Total $ 26,667 $ (86) 15 $ 926 $ — 1 $ 27,593 $ (86) 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 June 30, 2021 and 2020: Range Weighted Minimum Maximum Average June 30, 2021 Constant prepayment rate 6.00 % 15.00 % 12.84 % Collateral default rate 1.83 % 21.58 % 13.09 % Loss severity rate — % 14.53 % 4.82 % June 30, 2020 Constant prepayment rate 6.00 % 15.00 % 9.21 % Collateral default rate 2.00 % 19.96 % 10.21 % Loss severity rate — % 12.41 % 2.48 %
Other than Temporary Impairment, Credit Losses Recognized in Earnings	The following table presents the OTTI recoveries for the three and nine months ended June 30, 2021 and 2020 (dollars in thousands): Three Months Ended Three Months Ended Held To Held To Total recoveries $ 6 $ 6 Net recoveries recognized in earnings (1) $ 6 $ 6 Nine Months Ended Nine Months Ended Held To Held To Total recoveries $ 14 $ 113 Net recoveries recognized in earnings (1) $ 14 $ 113 _________________ (1) 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 nine months ended June 30, 2021 and 2020 (dollars in thousands): Nine Months Ended 2021 2020 Beginning balance of credit loss $ 885 $ 1,071 Additions: Additional increases to the amount related to credit loss for which OTTI was previously recognized — 2 Subtractions: Realized losses previously recorded as credit losses (5) (65) Recovery of prior credit loss (14) (112) Ending balance of credit loss $ 866 $ 896
Schedule of Contractual Maturities of Debt Securities	The contractual maturities of debt securities at June 30, 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 $ — $ — $ 926 $ 926 Due after one year to five years 11,226 11,268 2,654 2,653 Due after five years to ten years 23,556 24,064 18,247 18,285 Due after ten years 17,532 18,264 45,479 45,627 Total $ 52,314 $ 53,596 $ 67,306 $ 67,491

Loans Receivable And Allowanc_2

Loans Receivable And Allowance For Loan Losses (Tables)	9 Months Ended
	Jun. 30, 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 June 30, 2021 and September 30, 2020 (dollars in thousands): June 30, September 30, Amount Percent Amount Percent Mortgage loans: One- to four-family (1) $ 119,173 10.7 % $ 118,580 10.5 % Multi-family 94,756 8.5 85,053 7.5 Commercial 458,889 41.3 453,574 40.0 Construction - custom and owner/builder 105,484 9.5 129,572 11.4 Construction - speculative one- to four-family 18,038 1.6 14,592 1.3 Construction - commercial 43,879 3.9 33,144 2.9 Construction - multi-family 45,624 4.1 34,476 3.0 Construction - land development 4,434 0.4 7,712 0.7 Land 18,289 1.6 25,571 2.3 Total mortgage loans 908,566 81.6 902,274 79.6 Consumer loans: Home equity and second mortgage 31,891 2.9 32,077 2.8 Other 2,725 0.2 3,572 0.3 Total consumer loans 34,616 3.1 35,649 3.1 Commercial loans: Commercial business 72,890 6.7 69,540 6.1 U.S. Small Business Administration ("SBA") Paycheck Protection Program ("PPP") loans 95,633 8.6 126,820 11.2 Total commercial loans 168,523 15.3 % 196,360 17.3 Total loans receivable 1,111,705 100.0 % 1,134,283 100.0 % Less: Undisbursed portion of construction loans in process 90,332 100,558 Deferred loan origination fees, net 6,339 6,436 Allowance for loan losses 13,469 13,414 Subtotal 110,140 120,408 Loans receivable, net $ 1,001,565 $ 1,013,875 _____________________________ (1) Does not include one- to four-family loans held for sale totaling $3,359 and $4,509 at June 30, 2021 and September 30, 2020, respectively.
Schedule of Allowance for Loan Losses	The following tables set forth information for the three and nine months ended June 30, 2021 and 2020 regarding activity in the allowance for loan losses by portfolio segment (dollars in thousands): Three Months Ended June 30, 2021 Beginning Provision for Charge- Recoveries Ending Mortgage loans: One- to four-family $ 1,151 $ (9) $ — $ — $ 1,142 Multi-family 784 26 — — 810 Commercial 7,238 (277) — — 6,961 Construction – custom and owner/builder 695 (91) — — 604 Construction – speculative one- to four-family 148 36 — — 184 Construction – commercial 714 44 — — 758 Construction – multi-family 323 125 — — 448 Construction – land development 19 12 — — 31 Land 407 (58) — 35 384 Consumer loans: Home equity and second mortgage 552 (1) — — 551 Other 56 — — — 56 Commercial business loans 1,347 193 — — 1,540 Total $ 13,434 $ — $ — $ 35 $ 13,469 Nine Months Ended June 30, 2021 Beginning Provision for Charge- Recoveries Ending Mortgage loans: One-to four-family $ 1,163 $ (21) $ — $ — $ 1,142 Multi-family 718 92 — — 810 Commercial 7,144 (183) — — 6,961 Construction – custom and owner/builder 832 (228) — — 604 Construction – speculative one- to four-family 158 26 — — 184 Construction – commercial 420 338 — — 758 Construction – multi-family 238 210 — — 448 Construction – land development 133 (102) — — 31 Land 572 (233) — 45 384 Consumer loans: Home equity and second mortgage 593 (42) — — 551 Other 71 (18) (1) 4 56 Commercial business loans 1,372 161 (2) 9 1,540 Total $ 13,414 $ — $ (3) $ 58 $ 13,469 Three Months Ended June 30, 2020 Beginning Provision for Charge- Recoveries Ending Mortgage loans: One- to four-family $ 1,149 $ 14 $ — $ — $ 1,163 Multi-family 595 70 — — 665 Commercial 5,762 957 — — 6,719 Construction – custom and owner/builder 697 110 — — 807 Construction – speculative one- to four-family 204 (40) — — 164 Construction – commercial 423 (119) — — 304 Construction – multi-family 394 (76) — — 318 Construction – land development 80 27 — — 107 Land 678 (41) — 5 642 Consumer loans: Home equity and second mortgage 656 (24) — — 632 Other 78 (4) (1) — 73 Commercial business loans 1,174 126 — — 1,300 Total $ 11,890 $ 1,000 $ (1) $ 5 $ 12,894 Nine Months Ended June 30, 2020 Beginning Provision for Charge- Recoveries Ending Mortgage loans: One-to four-family $ 1,167 $ (7) $ — $ 3 $ 1,163 Multi-family 481 184 — — 665 Commercial 4,154 2,560 — 5 6,719 Construction – custom and owner/builder 755 47 — 5 807 Construction – speculative one- to four-family 212 (48) — — 164 Construction – commercial 338 (34) — — 304 Construction – multi-family 375 (57) — — 318 Construction – land development 67 40 — — 107 Land 697 (70) — 15 642 Consumer loans: Home equity and second mortgage 623 9 — — 632 Other 99 (17) (12) 3 73 Commercial business loans 722 593 (15) — 1,300 Total $ 9,690 $ 3,200 $ (27) $ 31 $ 12,894
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 June 30, 2021 and September 30, 2020 (dollars in thousands): Allowance for Loan Losses Recorded Investment in Loans Individually Collectively Total Individually Collectively Total June 30, 2021 Mortgage loans: One- to four-family $ — $ 1,142 $ 1,142 $ 411 $ 118,762 $ 119,173 Multi-family — 810 810 — 94,756 94,756 Commercial — 6,961 6,961 2,753 456,136 458,889 Construction – custom and owner/builder — 604 604 — 57,309 57,309 Construction – speculative one- to four-family — 184 184 — 9,263 9,263 Construction – commercial — 758 758 — 37,007 37,007 Construction – multi-family — 448 448 — 22,397 22,397 Construction – land development — 31 31 — 1,151 1,151 Land — 384 384 169 18,120 18,289 Consumer loans: Home equity and second mortgage — 551 551 545 31,346 31,891 Other — 56 56 18 2,707 2,725 Commercial business loans 171 1,369 1,540 513 72,377 72,890 SBA PPP loans — — — — 95,633 95,633 Total $ 171 $ 13,298 $ 13,469 $ 4,409 $ 1,016,964 $ 1,021,373 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 June 30, 2021 and September 30, 2020 (dollars in thousands): 30–59 60-89 Non- Past Due Total Current Total June 30, 2021 Mortgage loans: One- to four-family $ — $ 183 $ 411 $ — $ 594 $ 118,579 $ 119,173 Multi-family — — — — — 94,756 94,756 Commercial — 509 373 — 882 458,007 458,889 Construction – custom and owner/builder — — — — — 57,309 57,309 Construction – speculative one- to four-family — — — — — 9,263 9,263 Construction – commercial — — — — — 37,007 37,007 Construction – multi-family — — — — — 22,397 22,397 Construction – land development — — — — — 1,151 1,151 Land — 204 169 — 373 17,916 18,289 Consumer loans: Home equity and second mortgage 17 — 545 — 562 31,329 31,891 Other — — 18 — 18 2,707 2,725 Commercial business loans — — 513 — 513 72,377 72,890 SBA PPP loans — — — — — 95,633 95,633 Total $ 17 $ 896 $ 2,029 $ — $ 2,942 $ 1,018,431 $ 1,021,373 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 June 30, 2021 and September 30, 2020 (dollars in thousands): Loan Grades June 30, 2021 Pass Watch Special Substandard Total Mortgage loans: One- to four-family $ 118,083 $ 132 $ 540 $ 418 $ 119,173 Multi-family 94,756 — — — 94,756 Commercial 440,143 10,335 7,595 816 458,889 Construction – custom and owner/builder 56,471 838 — — 57,309 Construction – speculative one- to four-family 9,263 — — — 9,263 Construction – commercial 35,490 — 1,517 — 37,007 Construction – multi-family 22,397 — — — 22,397 Construction – land development 1,114 — — 37 1,151 Land 16,983 567 570 169 18,289 Consumer loans: Home equity and second mortgage 31,193 35 — 663 31,891 Other 2,676 31 — 18 2,725 Commercial business loans 72,296 — 38 556 72,890 SBA PPP loans 95,633 — — — 95,633 Total $ 996,498 $ 11,938 $ 10,260 $ 2,677 $ 1,021,373 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 June 30, 2021 and for the three and nine 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 $ 411 $ 454 $ — $ 653 $ 717 $ 8 $ 50 $ 8 $ 45 Commercial 2,753 2,753 — 2,891 3,013 39 120 32 95 Land 169 169 — 171 285 1 2 1 2 Consumer loans: Home equity and second mortgage 545 545 — 542 561 1 1 1 1 Other 17 17 — 13 11 — — — — Commercial business loans 220 222 — 227 209 — — — — Subtotal 4,115 4,160 — 4,497 4,796 49 173 42 143 With an allowance recorded: Mortgage loans: One- to four-family — — — — 121 — — — — Commercial business loans 294 294 171 295 283 — — — — Subtotal 294 294 171 295 404 — — — — Total: Mortgage loans: One- to four-family 411 454 — 653 838 8 50 8 45 Commercial 2,753 2,753 — 2,891 3,013 39 120 32 95 Land 169 169 — 171 285 1 2 1 2 Consumer loans: Home equity and second mortgage 545 545 — 542 561 1 1 1 1 Other 17 17 — 13 11 — — — — Commercial business loans 514 516 171 521 492 — — — — Total $ 4,409 $ 4,454 $ 171 $ 4,791 $ 5,200 $ 49 $ 173 $ 42 $ 143 ______________________________________________ (1) For the three months ended June 30, 2021. (2) For the nine months ended June 30, 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 June 30, 2021 and September 30, 2020 (dollars in thousands): COVID-19 Loan Modifications June 30, 2021 Mortgage loans Count Balance Percent Commercial 1 $ 1,703 100.0 % Total mortgage loans 1 1,703 100.0 Total COVID-19 Modifications 1 $ 1,703 100.0 % 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 June 30, 2021 and September 30, 2020 (dollars in thousands): June 30, 2021 Accruing Non- Total Mortgage loans: Commercial $ 2,380 $ — $ 2,380 Land — 121 121 Consumer loans: Home equity and second mortgage — 66 66 Total $ 2,380 $ 187 $ 2,567 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)	9 Months Ended
	Jun. 30, 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 nine months ended June 30, 2021 and 2020 (dollars in thousands): Three Months Ended June 30, 2021 Nine Months Ended June 30, 2021 Lease cost: Operating lease cost $ 92 $ 277 Short-term lease cost — — Total lease cost $ 92 $ 277 Three Months Ended June 30, 2020 Nine Months Ended June 30, 2020 Lease cost: Operating lease cost $ 118 $ 284 Short-term lease cost — — Total lease cost $ 118 $ 284 The following table provides supplemental information to operating leases at or for the three and nine months ended June 30, 2021 and 2020 (dollars in thousands): At or For Three Months Ended June 30, 2021 At or For Nine Months Ended June 30, 2021 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 80 $ 240 Weighted average remaining lease term-operating leases 8.6 years 8.6 years Weighted average discount rate-operating leases 2.23 % 2.23 % At or For Three Months Ended June 30, 2020 At or For Nine Months Ended June 30, 2020 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 80 $ 239 Weighted average remaining lease term-operating leases 9.5 years 9.5 years Weighted average discount rate-operating leases 2.22 % 2.22 %
Lessee, Operating Lease, Liability, Maturity	Maturities of operating lease liabilities at June 30, 2021 for future fiscal years are as follows (dollars in thousands): Remainder of 2021 $ 86 2022 342 2023 310 2024 313 2025 317 Thereafter 1,322 Total lease payments 2,690 Less imputed interest 258 Total $ 2,432

Net Income Per Common Share (Ta

Net Income Per Common Share (Tables)	9 Months Ended
	Jun. 30, 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 nine months ended June 30, 2021 and 2020 is as follows (dollars in thousands, except per share amounts): Three Months Ended June 30, Nine Months Ended June 30, 2021 2020 2021 2020 Basic net income per common share computation Numerator – net income $ 7,024 $ 6,211 $ 21,565 $ 17,912 Denominator – weighted average common shares outstanding 8,365,350 8,309,947 8,336,590 8,331,908 Basic net income per common share $ 0.84 $ 0.75 $ 2.59 $ 2.15 Diluted net income per common share computation Numerator – net income $ 7,024 $ 6,211 $ 21,565 $ 17,912 Denominator – weighted average common shares outstanding 8,365,350 8,309,947 8,336,590 8,331,908 Effect of dilutive stock options (1) 100,043 69,036 104,271 105,122 Weighted average common shares outstanding - assuming dilution 8,465,393 8,378,983 8,440,861 8,437,030 Diluted net income per common share $ 0.83 $ 0.74 $ 2.55 $ 2.12 ____________________________________________ (1) For the three and nine months ended June 30, 2021, average options to purchase 134,365 and 135,876 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 nine months ended June 30, 2020, average options to purchase 135,212 and 126,052 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)	9 Months Ended
	Jun. 30, 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 nine months ended June 30, 2021 and 2020 are as follows (dollars in thousands): Three Months Ended June 30, 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 $ 144 $ (23) $ 121 Other comprehensive income 1 7 8 Balance of AOCI at the end of period $ 145 $ (16) $ 129 Nine Months Ended June 30, 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 58 10 68 Balance of AOCI at the end of period $ 145 $ (16) $ 129 Three Months Ended June 30, 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 $ (151) $ (28) $ (179) Other comprehensive income 154 1 155 Balance of AOCI at the end of period $ 3 $ (27) $ (24) Nine Months Ended June 30, 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 (87) 13 (74) Balance of AOCI at the end of period $ 3 $ (27) $ (24) __________________________ (1) All amounts are net of income taxes.

Stock Compensation Plans (Table

Stock Compensation Plans (Tables)	9 Months Ended
	Jun. 30, 2021
Share-based Payment Arrangement, Noncash Expense [Abstract]
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award	Stock option activity for the nine months ended June 30, 2021 and 2020 is summarized as follows: Nine Months Ended June 30, 2021 Nine Months Ended June 30, 2020 Number of Shares Weighted Number of Shares Weighted Options outstanding, beginning of period 395,349 $ 18.45 378,304 $ 18.15 Exercised (62,764) 9.82 (37,975) 10.31 Granted 1,500 19.13 1,000 26.50 Forfeited (5,270) 26.91 (9,050) 25.10 Options outstanding, end of period 328,815 $ 19.96 332,279 $ 18.88
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions	The weighted average assumptions for options granted during the nine months ended June 30, 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 June 30, 2021 is as follows: Options Outstanding Options Exercisable Range of Number Weighted Weighted Number Weighted Weighted $5.86 - 6.00 4,000 $ 5.93 1.3 4,000 $ 5.93 1.3 9.00 27,000 9.00 2.3 27,000 9.00 2.3 10.26 - 10.71 60,575 10.57 3.7 60,575 10.57 3.7 15.67 - 19.13 103,000 16.50 7.9 24,400 16.50 5.3 26.50 - 27.14 43,990 27.13 8.3 8,798 27.13 8.3 29.69 50,250 29.69 6.3 30,150 29.69 6.3 31.80 40,000 31.80 7.3 16,000 31.80 7.3 328,815 $ 19.96 6.3 170,923 $ 17.15 4.7

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Jun. 30, 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 June 30, 2021 and September 30, 2020 were as follows (dollars in thousands): June 30, 2021 Estimated Fair Value Level 1 Level 2 Level 3 Total Available for sale investment securities MBS: U.S. government agencies $ — $ 67,491 $ — $ 67,491 Investments in equity securities Mutual funds 960 — — 960 Total $ 960 $ 67,491 $ — $ 68,451 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 June 30, 2021 (dollars in thousands): Estimated Fair Value Level 1 Level 2 Level 3 Impaired loans: Commercial business loans $ — $ — $ 123 Total impaired loans — — 123 Investment securities – held to maturity: MBS - private label residential — 9 — OREO and other repossessed assets — — 157 Total $ — $ 9 $ 280 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 June 30, 2021 (dollars in thousands): Estimated Valuation Unobservable Input(s) Range Impaired loans $ 123 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 June 30, 2021 and September 30, 2020 (dollars in thousands): June 30, 2021 Fair Value Measurements Using: Recorded Estimated Fair Value Financial assets Cash and cash equivalents $ 503,726 $ 503,726 $ 503,726 $ — $ — CDs held for investment 31,218 31,218 31,218 — — Investment securities 119,805 121,087 18,816 102,271 — Investments in equity securities 960 960 960 — — FHLB stock 2,103 2,103 2,103 — — Other investments 3,000 3,000 3,000 — — Loans held for sale 3,359 3,467 3,467 — — Loans receivable, net 1,001,565 1,022,389 — — 1,022,389 Accrued interest receivable 4,260 4,260 4,260 — — Financial liabilities Certificates of deposit 139,965 141,225 — — 141,225 FHLB borrowings 5,000 5,039 — — 5,039 Accrued interest payable 154 154 154 — — 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)	9 Months Ended
	Jun. 30, 2021segment
Accounting Policies [Abstract]
Number of operating segments	1

Investment Securities_ Marketab

Investment Securities: Marketable Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Sep. 30, 2020
Held to maturity
Amortized Cost	$ 52,314	$ 27,890
Gross Unrealized Gains	1,382	1,942
Gross Unrealized Losses	(100)	(5)
Estimated Fair Value	53,596	29,827
Available for sale
Estimated Fair Value	68,451	58,884
Mortgage-backed Securities, U.S. government agencies
Held to maturity
Amortized Cost	24,508	27,161
Gross Unrealized Gains	1,074	1,635
Gross Unrealized Losses	(19)	(3)
Estimated Fair Value	25,563	28,793
Available for sale
Amortized Cost	67,306	57,797
Gross Unrealized Gains	271	178
Gross Unrealized Losses	(86)	(68)
Estimated Fair Value	67,491	57,907
Mortgage-backed Securities, Private label residential
Held to maturity
Amortized Cost	8,432	229
Gross Unrealized Gains	300	307
Gross Unrealized Losses	(22)	(1)
Estimated Fair Value	8,710	535
U.S. Treasury and U.S. government agency securities
Held to maturity
Amortized Cost	18,874	500
Gross Unrealized Gains	1	0
Gross Unrealized Losses	(59)	(1)
Estimated Fair Value	18,816	$ 499
Bank issued trust preferred securities
Held to maturity
Amortized Cost	500
Gross Unrealized Gains	7
Gross Unrealized Losses	0
Estimated Fair Value	$ 507

Investment Securities_ Unrealiz

Investment Securities: Unrealized Gain (Loss) on Investments (Details) $ in Thousands	Jun. 30, 2021USD ($)security	Sep. 30, 2020USD ($)security
Held-to-maturity Securities, Fair Value:
Held to maturity, Less Than 12 Months, Estimated Fair Value	$ 21,446	$ 5,636
Held to maturity, 12 Months or Longer, Estimated Fair Value	17	50
Held to maturity, Total, Estimated Fair Value	21,463	5,686
Held-to-maturity Securities, Gross Unrealized Losses
Held to maturity, Less Than 12 Months, Gross Unrealized Losses	(100)	(3)
Held to maturity, 12 Months or Longer, Gross Unrealized Losses	0	(2)
Held to maturity, Total, Gross Unrealized Losses	$ (100)	$ (5)
Held to maturity, Less Than 12 Months, Quantity | security	10	6
Held to maturity, 12 Months or Longer, Quantity | security	4	6
Available-for-sale Securities, Fair Value:
Available for sale, Less Than 12 Months, Estimated Fair Value	$ 26,667	$ 21,464
Available for sale, 12 Months or Longer, Estimated Fair Value	926	0
Available for sale, Total, Estimated Fair Value	27,593	21,464
Available-for-sale Securities, Gross Unrealized Losses:
Available for sale, Less Than 12 Months, Gross Unrealized Losses	(86)	(68)
Available for sale, 12 Months or Longer, Gross Unrealized Losses	0	0
Available for sale, Total, Gross Unrealized Losses	$ (86)	$ (68)
Available-for-sale, Less than 12 Months, Quantity | security	15	11
Available-for-sale, 12 Months or Longer, Quantity | security	1	0
Mortgage-backed Securities, U.S. government agencies
Held-to-maturity Securities, Fair Value:
Held to maturity, Less Than 12 Months, Estimated Fair Value	$ 4,269	$ 5,130
Held to maturity, 12 Months or Longer, Estimated Fair Value	16	39
Held to maturity, Total, Estimated Fair Value	4,285	5,169
Held-to-maturity Securities, Gross Unrealized Losses
Held to maturity, Less Than 12 Months, Gross Unrealized Losses	(19)	(2)
Held to maturity, 12 Months or Longer, Gross Unrealized Losses	0	(1)
Held to maturity, Total, Gross Unrealized Losses	$ (19)	$ (3)
Held to maturity, Less Than 12 Months, Quantity | security	5	4
Held to maturity, 12 Months or Longer, Quantity | security	3	4
Available-for-sale Securities, Fair Value:
Available for sale, Less Than 12 Months, Estimated Fair Value	$ 26,667	$ 21,464
Available for sale, 12 Months or Longer, Estimated Fair Value	926	0
Available for sale, Total, Estimated Fair Value	27,593	21,464
Available-for-sale Securities, Gross Unrealized Losses:
Available for sale, Less Than 12 Months, Gross Unrealized Losses	(86)	(68)
Available for sale, 12 Months or Longer, Gross Unrealized Losses	0	0
Available for sale, Total, Gross Unrealized Losses	$ (86)	$ (68)
Available-for-sale, Less than 12 Months, Quantity | security	15	11
Available-for-sale, 12 Months or Longer, Quantity | security	1	0
Mortgage-backed Securities, Private label residential
Held-to-maturity Securities, Fair Value:
Held to maturity, Less Than 12 Months, Estimated Fair Value	$ 8,223	$ 7
Held to maturity, 12 Months or Longer, Estimated Fair Value	1	11
Held to maturity, Total, Estimated Fair Value	8,224	18
Held-to-maturity Securities, Gross Unrealized Losses
Held to maturity, Less Than 12 Months, Gross Unrealized Losses	(22)	0
Held to maturity, 12 Months or Longer, Gross Unrealized Losses	0	(1)
Held to maturity, Total, Gross Unrealized Losses	$ (22)	$ (1)
Held to maturity, Less Than 12 Months, Quantity | security	2	1
Held to maturity, 12 Months or Longer, Quantity | security	1	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	$ 8,954
Held to maturity, 12 Months or Longer, Estimated Fair Value	0
Held to maturity, Total, Estimated Fair Value	8,954
Held-to-maturity Securities, Gross Unrealized Losses
Held to maturity, Less Than 12 Months, Gross Unrealized Losses	(59)
Held to maturity, 12 Months or Longer, Gross Unrealized Losses	0
Held to maturity, Total, Gross Unrealized Losses	$ (59)
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		$ 499
Held to maturity, 12 Months or Longer, Estimated Fair Value		0
Held to maturity, Total, Estimated Fair Value		499
Held-to-maturity Securities, Gross Unrealized Losses
Held to maturity, Less Than 12 Months, Gross Unrealized Losses		(1)
Held to maturity, 12 Months or Longer, Gross Unrealized Losses		0
Held to maturity, Total, Gross Unrealized Losses		$ (1)
Held to maturity, Less Than 12 Months, Quantity | security		1
Held to maturity, 12 Months or Longer, Quantity | security		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		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Net recoveries on investment securities	$ (6)	$ (6)	$ (14)	$ (113)
Held-to-maturity Securities
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Recoveries (other than temporary impairment OTTI) on investment securities	6	6	14	113
Net recoveries on investment securities	$ 6	$ 6	$ 14	$ 113
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	1.83%	2.00%	1.83%	2.00%
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	21.58%	19.96%	21.58%	19.96%
OTTI significant inputs - Loss severity rate	14.53%	12.41%	14.53%	12.41%
Weighted Average
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
OTTI significant inputs - Constant prepayment rate	12.84%	9.21%	12.84%	9.21%
OTTI significant inputs - Collateral default rate	13.09%	10.21%	13.09%	10.21%
OTTI significant inputs - Loss severity rate	4.82%	2.48%	4.82%	2.48%

Investment Securities_ Other th

Investment Securities: Other than Temporary Impairment, Credit Losses Recognized in Earnings (Details) - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Beginning balance of credit loss	$ 885	$ 1,071
Additional increases to the amount related to credit loss for which OTTI was previously recognized	0	2
Realized losses previously recorded as credit losses	(5)	(65)
Recovery of prior credit loss	(14)	(112)
Ending balance of credit loss	$ 866	$ 896

Investment Securities_ Narrativ

Investment Securities: Narrative-Realized Gains (Losses) (Details) $ in Thousands	9 Months Ended
	Jun. 30, 2021USD ($)security	Jun. 30, 2020USD ($)security	Sep. 30, 2020USD ($)
Investments [Abstract]
Loss on sale of securities	$ 5	$ 65
Held-to-maturity securities, realized loss, number of securities | security	12	9
Security owned and pledged as collateral	$ 98,620		$ 81,030

Investment Securities_ Schedu_2

Investment Securities: Schedule of Contractual maturities of debt securities (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Sep. 30, 2020
Held-to-maturity Securities, Amortized Cost:
Due within one year	$ 0
Due after one year to five years	11,226
Due after five years to ten years	23,556
Due after ten years	17,532
Total	52,314	$ 27,890	[1]
Held-to-maturity Securities, Estimated Fair Value:
Due within one year	0
Due after one year to five years	11,268
Due after five years to ten years	24,064
Due after ten years	18,264
Total	53,596	$ 29,827
Available-for-sale Securities, Amortized Cost:
Due within one year	926
Due after one year to five years	2,654
Due after five years to ten years	18,247
Due after ten years	45,479
Total	67,306
Available-for-sale Securities, Estimated Fair Value:
Due within one year	926
Due after one year to five years	2,653
Due after five years to ten years	18,285
Due after ten years	45,627
Total	$ 67,491
[1]	Derived from audited consolidated financial statements.

Goodwill and CDI - Goodwill (De

Goodwill and CDI - Goodwill (Details) - USD ($) $ in Thousands	Jun. 30, 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	Jun. 30, 2021	Sep. 30, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable	$ 1,111,705	$ 1,134,283
Undisbursed portion of construction  loans in process	90,332	100,558
Deferred loan origination fees, net	6,339	6,436
Allowance for loan losses	13,469	13,414
Less: Loans in process, Deferred fees and Allowance for loan losses	110,140	120,408
Loans receivable, net	$ 1,001,565	$ 1,013,875	[1]
Ratio of loan category to total loans receivable (percent)	100.00%	100.00%
Mortgage loans excluded	$ 3,359	$ 4,509
Total mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans	$ 908,566	$ 902,274
Ratio of loan category to total loans receivable (percent)	81.60%	79.60%
Mortgage loans, one-to-four family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans	$ 119,173	$ 118,580
Ratio of loan category to total loans receivable (percent)	10.70%	10.50%
Mortgage loans, multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans	$ 94,756	$ 85,053
Ratio of loan category to total loans receivable (percent)	8.50%	7.50%
Mortgage loans, commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans	$ 458,889	$ 453,574
Ratio of loan category to total loans receivable (percent)	41.30%	40.00%
Mortgage loans, construction - custom and owner/builder
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans	$ 105,484	$ 129,572
Ratio of loan category to total loans receivable (percent)	9.50%	11.40%
Mortgage loans, construction - speculative one-to-four family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans	$ 18,038	$ 14,592
Ratio of loan category to total loans receivable (percent)	1.60%	1.30%
Mortgage loans, construction – commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans	$ 43,879	$ 33,144
Ratio of loan category to total loans receivable (percent)	3.90%	2.90%
Mortgage loans, construction - Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans	$ 45,624	$ 34,476
Ratio of loan category to total loans receivable (percent)	4.10%	3.00%
Mortgage loans, construction - Land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans	$ 4,434	$ 7,712
Ratio of loan category to total loans receivable (percent)	0.40%	0.70%
Mortgage loans, land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans	$ 18,289	$ 25,571
Ratio of loan category to total loans receivable (percent)	1.60%	2.30%
Total consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer loans	$ 34,616	$ 35,649
Ratio of loan category to total loans receivable (percent)	3.10%	3.10%
Consumer loans, home equity and second mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer loans	$ 31,891	$ 32,077
Ratio of loan category to total loans receivable (percent)	2.90%	2.80%
Consumer loans, other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Consumer loans	$ 2,725	$ 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	$ 72,890	$ 69,540
Ratio of loan category to total loans receivable (percent)	6.70%	6.10%
SBA PPP Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial business loans	$ 95,633	$ 126,820
Ratio of loan category to total loans receivable (percent)	8.60%	11.20%
Total Commercial Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Commercial business loans	$ 168,523	$ 196,360
Ratio of loan category to total loans receivable (percent)	15.30%	17.30%
[1]	Derived from audited consolidated financial statements.

Loans Receivable And Allowanc_4

Loans Receivable And Allowance For Loan Losses - Narrative (Details) - USD ($)	Jun. 30, 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	$ 499,000	$ 790,000
Troubled debt restructured loan	2,567,000	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		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, Beginning Allowance	$ 13,434	$ 11,890	$ 13,414	$ 9,690
Provision for (Recapture of) Loan Losses	0	1,000	0	3,200
Charge- offs	0	(1)	(3)	(27)
Recoveries	35	5	58	31
Allowance for loan losses, Ending Allowance	13,469	12,894	13,469	12,894
Mortgage loans, one-to-four family
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, Beginning Allowance	1,151	1,149	1,163	1,167
Provision for (Recapture of) Loan Losses	(9)	14	(21)	(7)
Charge- offs	0	0	0	0
Recoveries	0	0	0	3
Allowance for loan losses, Ending Allowance	1,142	1,163	1,142	1,163
Mortgage loans, multi-family
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, Beginning Allowance	784	595	718	481
Provision for (Recapture of) Loan Losses	26	70	92	184
Charge- offs	0	0	0	0
Recoveries	0	0	0	0
Allowance for loan losses, Ending Allowance	810	665	810	665
Mortgage loans, commercial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, Beginning Allowance	7,238	5,762	7,144	4,154
Provision for (Recapture of) Loan Losses	(277)	957	(183)	2,560
Charge- offs	0	0	0	0
Recoveries	0	0	0	5
Allowance for loan losses, Ending Allowance	6,961	6,719	6,961	6,719
Mortgage loans, construction - custom and owner/builder
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, Beginning Allowance	695	697	832	755
Provision for (Recapture of) Loan Losses	(91)	110	(228)	47
Charge- offs	0	0	0	0
Recoveries	0	0	0	5
Allowance for loan losses, Ending Allowance	604	807	604	807
Mortgage loans, construction - speculative one-to-four family
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, Beginning Allowance	148	204	158	212
Provision for (Recapture of) Loan Losses	36	(40)	26	(48)
Charge- offs	0	0	0	0
Recoveries	0	0	0	0
Allowance for loan losses, Ending Allowance	184	164	184	164
Mortgage loans, construction – commercial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, Beginning Allowance	714	423	420	338
Provision for (Recapture of) Loan Losses	44	(119)	338	(34)
Charge- offs	0	0	0	0
Recoveries	0	0	0	0
Allowance for loan losses, Ending Allowance	758	304	758	304
Mortgage loans, construction - Multi-family
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, Beginning Allowance	323	394	238	375
Provision for (Recapture of) Loan Losses	125	(76)	210	(57)
Charge- offs	0	0	0	0
Recoveries	0	0	0	0
Allowance for loan losses, Ending Allowance	448	318	448	318
Mortgage loans, construction - Land development
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, Beginning Allowance	19	80	133	67
Provision for (Recapture of) Loan Losses	12	27	(102)	40
Charge- offs	0		0	0
Recoveries	0	0	0	0
Allowance for loan losses, Ending Allowance	31	107	31	107
Mortgage loans, land
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, Beginning Allowance	407	678	572	697
Provision for (Recapture of) Loan Losses	(58)	(41)	(233)	(70)
Charge- offs	0	0	0	0
Recoveries	35	5	45	15
Allowance for loan losses, Ending Allowance	384	642	384	642
Consumer loans, home equity and second mortgage
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, Beginning Allowance	552	656	593	623
Provision for (Recapture of) Loan Losses	(1)	(24)	(42)	9
Charge- offs	0	0	0	0
Recoveries	0	0	0	0
Allowance for loan losses, Ending Allowance	551	632	551	632
Consumer loans, other
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, Beginning Allowance	56	78	71	99
Provision for (Recapture of) Loan Losses	0	(4)	(18)	(17)
Charge- offs	0	(1)	(1)	(12)
Recoveries	0	0	4	3
Allowance for loan losses, Ending Allowance	56	73	56	73
Commercial business loans
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for loan losses, Beginning Allowance	1,347	1,174	1,372	722
Provision for (Recapture of) Loan Losses	193	126	161	593
Charge- offs	0	0	(2)	(15)
Recoveries	0	0	9	0
Allowance for loan losses, Ending Allowance	$ 1,540	$ 1,300	$ 1,540	$ 1,300

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	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	$ 171		$ 41
Allowance for Loan Losses, Collectively Evaluated for Impairment	13,298		13,373
Allowance for Loan Losses, Total	13,469	$ 13,434	13,414	$ 12,894	$ 11,890	$ 9,690
Recorded Investment in Loans, Individually Evaluated for Impairment	4,409		5,773
Recorded Investment in Loans, Collectively Evaluated for Impairment	1,016,964		1,027,952
Loans receivable	1,021,373		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	1,142		1,160
Allowance for Loan Losses, Total	1,142	1,151	1,163	1,163	1,149	1,167
Recorded Investment in Loans, Individually Evaluated for Impairment	411		1,143
Recorded Investment in Loans, Collectively Evaluated for Impairment	118,762		117,437
Loans receivable	119,173		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	810		718
Allowance for Loan Losses, Total	810	784	718	665	595	481
Recorded Investment in Loans, Individually Evaluated for Impairment	0		0
Recorded Investment in Loans, Collectively Evaluated for Impairment	94,756		85,053
Loans receivable	94,756		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	6,961		7,144
Allowance for Loan Losses, Total	6,961	7,238	7,144	6,719	5,762	4,154
Recorded Investment in Loans, Individually Evaluated for Impairment	2,753		3,242
Recorded Investment in Loans, Collectively Evaluated for Impairment	456,136		450,332
Loans receivable	458,889		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	604		832
Allowance for Loan Losses, Total	604	695	832	807	697	755
Recorded Investment in Loans, Individually Evaluated for Impairment	0		0
Recorded Investment in Loans, Collectively Evaluated for Impairment	57,309		75,332
Loans receivable	57,309		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	184		158
Allowance for Loan Losses, Total	184	148	158	164	204	212
Recorded Investment in Loans, Individually Evaluated for Impairment	0		0
Recorded Investment in Loans, Collectively Evaluated for Impairment	9,263		7,108
Loans receivable	9,263		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	758		420
Allowance for Loan Losses, Total	758	714	420	304	423	338
Recorded Investment in Loans, Individually Evaluated for Impairment	0		0
Recorded Investment in Loans, Collectively Evaluated for Impairment	37,007		20,927
Loans receivable	37,007		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	448		238
Allowance for Loan Losses, Total	448	323	238	318	394	375
Recorded Investment in Loans, Individually Evaluated for Impairment	0		0
Recorded Investment in Loans, Collectively Evaluated for Impairment	22,397		10,832
Loans receivable	22,397		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	31		133
Allowance for Loan Losses, Total	31	19	133	107	80	67
Recorded Investment in Loans, Individually Evaluated for Impairment	0		0
Recorded Investment in Loans, Collectively Evaluated for Impairment	1,151		4,739
Loans receivable	1,151		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	384		572
Allowance for Loan Losses, Total	384	407	572	642	678	697
Recorded Investment in Loans, Individually Evaluated for Impairment	169		394
Recorded Investment in Loans, Collectively Evaluated for Impairment	18,120		25,177
Loans receivable	18,289		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	551		593
Allowance for Loan Losses, Total	551	552	593	632	656	623
Recorded Investment in Loans, Individually Evaluated for Impairment	545		555
Recorded Investment in Loans, Collectively Evaluated for Impairment	31,346		31,522
Loans receivable	31,891		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	56	71	73	78	99
Recorded Investment in Loans, Individually Evaluated for Impairment	18		9
Recorded Investment in Loans, Collectively Evaluated for Impairment	2,707		3,563
Loans receivable	2,725		3,572
Commercial business loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for Loan Losses, Individually Evaluated for Impairment	171		38
Allowance for Loan Losses, Collectively Evaluated for Impairment	1,369		1,334
Allowance for Loan Losses, Total	1,540	$ 1,347	1,372	$ 1,300	$ 1,174	$ 722
Recorded Investment in Loans, Individually Evaluated for Impairment	513		430
Recorded Investment in Loans, Collectively Evaluated for Impairment	72,377		69,110
Loans receivable	72,890		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
Recorded Investment in Loans, Individually Evaluated for Impairment	0		0
Recorded Investment in Loans, Collectively Evaluated for Impairment	95,633		126,820
Loans receivable	$ 95,633		$ 126,820

Loans Receivable And Allowanc_7

Loans Receivable And Allowance For Loan Losses: Past Due Status of Loans (Details) - USD ($) $ in Thousands		Jun. 30, 2021		Sep. 30, 2020
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		$ 1,021,373		$ 1,033,725
Loans receivable, Non-Accrual	[1]	2,029		2,905
Mortgage loans, one-to-four family
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		119,173		118,580
Loans receivable, Non-Accrual	[1]	411		659
Mortgage loans, multi-family
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		94,756		85,053
Loans receivable, Non-Accrual	[1]	0		0
Mortgage loans, commercial
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		458,889		453,574
Loans receivable, Non-Accrual	[1]	373		858
Mortgage loans, construction - custom and owner/builder
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		57,309		75,332
Loans receivable, Non-Accrual	[1]	0		0
Mortgage loans, construction - speculative one-to-four family
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		9,263		7,108
Loans receivable, Non-Accrual	[1]	0		0
Mortgage loans, construction – commercial
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		37,007		20,927
Loans receivable, Non-Accrual	[1]	0		0
Mortgage loans, construction - Multi-family
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		22,397		10,832
Loans receivable, Non-Accrual	[1]	0		0
Mortgage loans, construction - Land development
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		1,151		4,739
Loans receivable, Non-Accrual	[1]	0		0
Mortgage loans, land
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		18,289		25,571
Loans receivable, Non-Accrual	[1]	169		394
Consumer loans, home equity and second mortgage
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		31,891		32,077
Loans receivable, Non-Accrual	[1]	545		555
Consumer loans, other
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		2,725		3,572
Loans receivable, Non-Accrual	[1]	18		9
Commercial business loans
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		72,890		69,540
Loans receivable, Non-Accrual		513	[1]	430
SBA PPP Loans
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		95,633		126,820
Loans receivable, Non-Accrual		0		0	[1]
30 to 59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		17		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		0		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		0		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		0		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		17		0
30 to 59 Days Past Due | Consumer loans, other
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		0		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		896		791
60 to 89 Days Past Due | Mortgage loans, one-to-four family
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		183		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		509		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		204		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		0		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]
Past Due 90 Days or More and Still Accruing		0		0
Past Due 90 Days or More and Still Accruing | Mortgage loans, one-to-four family
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Still Accruing		0		0
Past Due 90 Days or More and Still Accruing | Mortgage loans, multi-family
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Still Accruing		0		0
Past Due 90 Days or More and Still Accruing | Mortgage loans, commercial
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Still Accruing		0		0
Past Due 90 Days or More and Still Accruing | Mortgage loans, construction - custom and owner/builder
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Still Accruing		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]
Past Due 90 Days or More and Still Accruing		0		0
Past Due 90 Days or More and Still Accruing | Mortgage loans, construction – commercial
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Still Accruing		0		0
Past Due 90 Days or More and Still Accruing | Mortgage loans, construction - Multi-family
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Still Accruing		0		0
Past Due 90 Days or More and Still Accruing | Mortgage loans, construction - Land development
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Still Accruing		0		0
Past Due 90 Days or More and Still Accruing | Mortgage loans, land
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Still Accruing		0		0
Past Due 90 Days or More and Still Accruing | Consumer loans, home equity and second mortgage
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Still Accruing		0		0
Past Due 90 Days or More and Still Accruing | Consumer loans, other
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Still Accruing		0		0
Past Due 90 Days or More and Still Accruing | Commercial business loans
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Still Accruing		0
Past Due 90 Days or More and Still Accruing | SBA PPP Loans
Financing Receivable, Past Due [Line Items]
Past Due 90 Days or More and Still Accruing		0		0
Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		2,942		3,748
Financial Asset, Past Due | Mortgage loans, one-to-four family
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		594		727
Financial Asset, Past Due | Mortgage loans, multi-family
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		0		0
Financial Asset, Past Due | Mortgage loans, commercial
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		882		1,377
Financial Asset, Past Due | Mortgage loans, construction - custom and owner/builder
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		0		0
Financial Asset, Past Due | Mortgage loans, construction - speculative one-to-four family
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		0		0
Financial Asset, Past Due | Mortgage loans, construction – commercial
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		0		0
Financial Asset, Past Due | Mortgage loans, construction - Multi-family
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		0		0
Financial Asset, Past Due | Mortgage loans, construction - Land development
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		0		38
Financial Asset, Past Due | Mortgage loans, land
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		373		538
Financial Asset, Past Due | Consumer loans, home equity and second mortgage
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		562		577
Financial Asset, Past Due | Consumer loans, other
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		18		12
Financial Asset, Past Due | Commercial business loans
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		513		479
Financial Asset, Past Due | SBA PPP Loans
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		0		0
Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		1,018,431		1,029,977
Financial Asset, Not Past Due | Mortgage loans, one-to-four family
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		118,579		117,853
Financial Asset, Not Past Due | Mortgage loans, multi-family
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		94,756		85,053
Financial Asset, Not Past Due | Mortgage loans, commercial
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		458,007		452,197
Financial Asset, Not Past Due | Mortgage loans, construction - custom and owner/builder
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		57,309		75,332
Financial Asset, Not Past Due | Mortgage loans, construction - speculative one-to-four family
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		9,263		7,108
Financial Asset, Not Past Due | Mortgage loans, construction – commercial
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		37,007		20,927
Financial Asset, Not Past Due | Mortgage loans, construction - Multi-family
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		22,397		10,832
Financial Asset, Not Past Due | Mortgage loans, construction - Land development
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		1,151		4,701
Financial Asset, Not Past Due | Mortgage loans, land
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		17,916		25,033
Financial Asset, Not Past Due | Consumer loans, home equity and second mortgage
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		31,329		31,500
Financial Asset, Not Past Due | Consumer loans, other
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		2,707		3,560
Financial Asset, Not Past Due | Commercial business loans
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		72,377		69,061
Financial Asset, Not Past Due | SBA PPP Loans
Financing Receivable, Past Due [Line Items]
Loans receivable, Total Past Due		$ 95,633		$ 126,820
[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	Jun. 30, 2021	Sep. 30, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	$ 1,021,373	$ 1,033,725
Mortgage loans, one-to-four family
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	119,173	118,580
Mortgage loans, multi-family
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	94,756	85,053
Mortgage loans, commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	458,889	453,574
Mortgage loans, construction - custom and owner/builder
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	57,309	75,332
Mortgage loans, construction - speculative one-to-four family
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	9,263	7,108
Mortgage loans, construction – commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	37,007	20,927
Mortgage loans, construction - Multi-family
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	22,397	10,832
Mortgage loans, construction - Land development
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	1,151	4,739
Mortgage loans, land
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	18,289	25,571
Consumer loans, home equity and second mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	31,891	32,077
Consumer loans, other
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	2,725	3,572
Commercial business loans
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	72,890	69,540
SBA PPP Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	95,633	126,820
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	996,498	1,012,666
Pass | Mortgage loans, one-to-four family
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	118,083	115,992
Pass | Mortgage loans, multi-family
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	94,756	85,053
Pass | Mortgage loans, commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	440,143	441,037
Pass | Mortgage loans, construction - custom and owner/builder
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	56,471	74,529
Pass | Mortgage loans, construction - speculative one-to-four family
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	9,263	7,108
Pass | Mortgage loans, construction – commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	35,490	19,525
Pass | Mortgage loans, construction - Multi-family
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	22,397	10,832
Pass | Mortgage loans, construction - Land development
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	1,114	4,701
Pass | Mortgage loans, land
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	16,983	23,290
Pass | Consumer loans, home equity and second mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	31,193	31,344
Pass | Consumer loans, other
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	2,676	3,531
Pass | Commercial business loans
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	72,296	68,904
Pass | SBA PPP Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	95,633	126,820
Watch
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	11,938	11,546
Watch | Mortgage loans, one-to-four family
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	132	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	10,335	7,712
Watch | Mortgage loans, construction - custom and owner/builder
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	838	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	567	1,518
Watch | Consumer loans, home equity and second mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	35	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	10,260	5,864
Special Mention | Mortgage loans, one-to-four family
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	540	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	7,595	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	570	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	38	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	2,677	3,649
Substandard | Mortgage loans, one-to-four family
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	418	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	816	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	37	38
Substandard | Mortgage loans, land
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	169	393
Substandard | Consumer loans, home equity and second mortgage
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	663	680
Substandard | Consumer loans, other
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	18	9
Substandard | Commercial business loans
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	556	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		9 Months Ended	12 Months Ended
	Jun. 30, 2021		Jun. 30, 2021	Sep. 30, 2020
Recorded Investment
With no related allowance recorded	$ 4,115		$ 4,115	$ 5,041
With an allowance recorded	294		294	732
Total:	4,409		4,409	5,773
Unpaid Principal Balance (Loan Balance Plus Charge Off)
With no related allowance recorded	4,160		4,160	5,129
With an allowance recorded	294		294	732
Total:	4,454		4,454	5,861
Related Allowance	171		171	41
Average Recorded Investment
With no related allowance recorded	4,497	[1]	4,796	5,251
With an allowance recorded	295	[1]	404	681
Total	4,791	[1]	5,200	5,932
Interest Income Recognized
With no related allowance recorded	49	[1]	173	177	[1]
With an allowance recorded	0	[1]	0	16
Total	49	[1]	173	193
Cash Basis Interest Income Recognized
With no related allowance recorded	42	[1]	143	141
With an allowance recorded	0	[1]	0	8
Total	42	[1]	143	149
Mortgage loans, one-to-four family
Recorded Investment
With no related allowance recorded	411		411	659
With an allowance recorded	0		0	484
Total:	411		411	1,143
Unpaid Principal Balance (Loan Balance Plus Charge Off)
With no related allowance recorded	454		454	703
With an allowance recorded	0		0	484
Total:	454		454	1,187
Related Allowance	0		0	3
Average Recorded Investment
With no related allowance recorded	653	[1]	717	1,127
With an allowance recorded	0	[1]	121	194
Total	653	[1]	838	1,321
Interest Income Recognized
With no related allowance recorded	8	[1]	50	44	[1]
With an allowance recorded	0	[1]	0	16
Total	8	[1]	50	60
Cash Basis Interest Income Recognized
With no related allowance recorded	8	[1]	45	34
With an allowance recorded	0	[1]	0	8
Total	8	[1]	45	42
Mortgage loans, commercial
Recorded Investment
With no related allowance recorded	2,753		2,753	3,242
Total:	2,753		2,753	3,242
Unpaid Principal Balance (Loan Balance Plus Charge Off)
With no related allowance recorded	2,753		2,753	3,242
Total:	2,753		2,753	3,242
Related Allowance	0		0	0
Average Recorded Investment
With no related allowance recorded	2,891	[1]	3,013	3,236
Total	2,891	[1]	3,013	3,236
Interest Income Recognized
With no related allowance recorded	39	[1]	120	133	[1]
Total	39	[1]	120	133
Cash Basis Interest Income Recognized
With no related allowance recorded	32	[1]	95	107
Total	32	[1]	95	107
Mortgage loans, land
Recorded Investment
With no related allowance recorded	169		169	394
With an allowance recorded				0
Total:	169		169	394
Unpaid Principal Balance (Loan Balance Plus Charge Off)
With no related allowance recorded	169		169	438
With an allowance recorded				0
Total:	169		169	438
Related Allowance	0		0	0
Average Recorded Investment
With no related allowance recorded	171	[1]	285	125
With an allowance recorded				110
Total	171	[1]	285	235
Interest Income Recognized
With no related allowance recorded	1	[1]	2	0	[1]
With an allowance recorded				0
Total	1	[1]	2	0
Cash Basis Interest Income Recognized
With no related allowance recorded	1	[1]	2	0
With an allowance recorded				0
Total	1	[1]	2	0
Consumer loans, home equity and second mortgage
Recorded Investment
With no related allowance recorded	545		545	555
Total:	545		545	555
Unpaid Principal Balance (Loan Balance Plus Charge Off)
With no related allowance recorded	545		545	555
Total:	545		545	555
Related Allowance	0		0	0
Average Recorded Investment
With no related allowance recorded	542	[1]	561	581
Total	542	[1]	561	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	17		17	9
With an allowance recorded				0
Total:	17		17	9
Unpaid Principal Balance (Loan Balance Plus Charge Off)
With no related allowance recorded	17		17	9
With an allowance recorded				0
Total:	17		17	9
Related Allowance	0		0	0
Average Recorded Investment
With no related allowance recorded	13	[1]	11	6
With an allowance recorded				7
Total	13	[1]	11	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	220		220	182
With an allowance recorded	294		294	248
Total:	514		514	430
Unpaid Principal Balance (Loan Balance Plus Charge Off)
With no related allowance recorded	222		222	182
With an allowance recorded	294		294	248
Total:	516		516	430
Related Allowance	171		171	38
Average Recorded Investment
With no related allowance recorded	227	[1]	209	176
With an allowance recorded	295		283	370
Total	521	[1]	492	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 June 30, 2021

Loans Receivable And Allowan_10

Loans Receivable And Allowance For Loan Losses: COVID Modifications (Details) $ in Thousands	Jun. 30, 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	1	5
Commercial loans modified for COVID | $	$ 1,703	$ 5,870
Total mortgage loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of mortgage loans modified | loan	1	4
Mortgage loans modified for COVID | $	$ 1,703	$ 5,820
Ratio of loan category to total loans, modified for COVID	100.00%	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	1	2
Mortgage loans modified for COVID | $	$ 1,703	$ 3,951
Ratio of loan category to total loans, modified for COVID	100.00%	67.20%
Mortgage loans, construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of mortgage loans modified | loan		1
Mortgage loans modified for COVID | $		$ 1,402
Ratio of loan category to total loans, modified for COVID		23.90%
Total consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Ratio of loan category to total loans, modified for COVID		0.90%
Number of consumer loans modified | loan		1
Consumer loans, modified for COVID | $		$ 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		0.90%
Number of consumer loans modified | loan		1
Consumer loans, modified for COVID | $		$ 50

Loans Receivable And Allowan_11

Loans Receivable And Allowance For Loan Losses: Schedule 1 of Troubled debt restructured loans (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Sep. 30, 2020
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loan	$ 2,567	$ 3,071
Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loan	2,380	2,868
Non-Accrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loan	187	203
Mortgage loans, one-to-four family
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loan		483
Mortgage loans, one-to-four family | Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loan		483
Mortgage loans, one-to-four family | Non-Accrual
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loan		0
Mortgage loans, commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loan	2,380	2,385
Mortgage loans, commercial | Accruing
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loan	2,380	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	121	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	121	130
Consumer loans, home equity and second mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loan	66	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	$ 66	$ 73

Leases (Details)

Leases (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Sep. 30, 2020	[1]	Oct. 01, 2019
Leases [Abstract]
Operating lease right-of-use ("ROU") assets	$ 2,360		$ 2,360		$ 2,587		$ 2,890
Operating lease cost	92	$ 118	277	$ 284
Short-term lease cost	0	0	0	0
Total lease cost	92	118	277	284
Operating cash flows from operating leases	$ 80	$ 80	$ 240	$ 239
Weighted average remaining lease term-operating leases	8 years 7 months 6 days	9 years 6 months	8 years 7 months 6 days	9 years 6 months
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	Jun. 30, 2021	Sep. 30, 2020
Leases [Abstract]
Remainder of 2021	$ 86
2022	342
2023	310
2024	313
2025	317
Thereafter	1,322
Total lease payments	2,690
Less imputed interest	258
Total	$ 2,432	$ 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		9 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Earnings Per Share, Basic [Abstract]
Numerator – net income		$ 7,024	$ 6,211	$ 21,565	$ 17,912
Denominator – weighted average common shares outstanding (in shares)		8,365,350	8,309,947	8,336,590	8,331,908
Basic net income per common share (in dollars per share)		$ 0.84	$ 0.75	$ 2.59	$ 2.15
Earnings Per Share, Diluted [Abstract]
Effect of dilutive stock options (in shares)	[1]	100,043	69,036	104,271	105,122
Weighted average common shares and common stock equivalents (in shares)		8,465,393	8,378,983	8,440,861	8,437,030
Diluted net income per common share (in dollars per share)		$ 0.83	$ 0.74	$ 2.55	$ 2.12
Stock Options
Earnings Per Share, Diluted [Abstract]
Antidilutive securities excluded from computation of earnings per share (in shares)		134,365	135,212	135,876	126,052
[1]	For the three and nine months ended June 30, 2020, average options to purchase 135,212 and 126,052 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		9 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021		Jun. 30, 2020
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period		$ 198,543	$ 178,008	$ 187,630	[1]	$ 171,067
Balance at end of period		203,492	182,806	203,492		182,806
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	[2]	121	(179)	61		50
Other comprehensive income	[2]	8	155	68		(74)
Balance at end of period	[2]	129	(24)	129		(24)
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]	144	(151)	87		90
Other comprehensive income	[2]	1	154	58		(87)
Balance at end of period	[2]	145	3	145		3
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]	(23)	(28)	(26)		(40)
Other comprehensive income	[2]	7	1	10		13
Balance at end of period	[2]	$ (16)	$ (27)	$ (16)		$ (27)
[1]	Derived from audited consolidated financial statements.
[2]	All amounts are net of income taxes.

Stock Compensation Plans (Detai

Stock Compensation Plans (Details) - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2021	Jun. 30, 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	$ 1,120	$ 640
Number of unvested stock options (shares)	157,892	141,570
Unvested stock options, aggregate grant date fair value	$ 564	$ 559
Unvested stock options, aggregate intrinsic value	$ 928
Stock options vested during period (shares)	200	13,100
Stock options vested during period, aggregate grant date fair value	$ 1
Stock options, outstanding, aggregate intrinsic value	2,910	$ 1,380
Unrecognized compensation expense, non-vested options	$ 461
Unrecognized compensation expense, non-vested options, amortization period (in years)	2 years 10 days
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)	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)	29,926
Equity Incentive Plan 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)	298,500		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	9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Shares:
Options outstanding, beginning of period (shares)	395,349	378,304
Exercised (shares)	(62,764)	(37,975)
Granted (shares)	1,500	1,000
Forfeited (shares)	(5,270)	(9,050)
Options outstanding, end of period (shares)	328,815	332,279
Weighted Average Exercise Price (in dollars per share):
Options outstanding, beginning of period (dollars per share)	$ 18.45	$ 18.15
Exercised (dollars per share)	9.82	10.31
Granted (dollars per share)	19.13	26.50
Forfeited (dollars per share)	26.91	25.10
Options outstanding, end of period (dollars per share)	$ 19.96	$ 18.88

Stock Compensation Plans And St

Stock Compensation Plans And Stock Based Compensation: Schedule of Fair Value Assumptions (Details)	9 Months Ended
	Jun. 30, 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	9 Months Ended
	Jun. 30, 2021$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding, Number (shares) | shares	328,815
Options Outstanding, Weighed Average Exercise Price (dollars per share)	$ 19.96
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	6 years 3 months 18 days
Options Exercisable, Number (shares) | shares	170,923
Options Exercisable, Weighted Average Exercise Price (dollars per share)	$ 17.15
Options Exercisable, Weighted Average Remaining Contractual Life (Years)	4 years 8 months 12 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	4,000
Options Outstanding, Weighed Average Exercise Price (dollars per share)	$ 5.93
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	1 year 3 months 18 days
Options Exercisable, Number (shares) | shares	4,000
Options Exercisable, Weighted Average Exercise Price (dollars per share)	$ 5.93
Options Exercisable, Weighted Average Remaining Contractual Life (Years)	1 year 3 months 18 days
$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	27,000
Options Outstanding, Weighed Average Exercise Price (dollars per share)	$ 9
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	2 years 3 months 18 days
Options Exercisable, Number (shares) | shares	27,000
Options Exercisable, Weighted Average Exercise Price (dollars per share)	$ 9
Options Exercisable, Weighted Average Remaining Contractual Life (Years)	2 years 3 months 18 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	60,575
Options Outstanding, Weighed Average Exercise Price (dollars per share)	$ 10.57
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	3 years 8 months 12 days
Options Exercisable, Number (shares) | shares	60,575
Options Exercisable, Weighted Average Exercise Price (dollars per share)	$ 10.57
Options Exercisable, Weighted Average Remaining Contractual Life (Years)	3 years 8 months 12 days
$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	103,000
Options Outstanding, Weighed Average Exercise Price (dollars per share)	$ 16.50
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	7 years 10 months 24 days
Options Exercisable, Number (shares) | shares	24,400
Options Exercisable, Weighted Average Exercise Price (dollars per share)	$ 16.50
Options Exercisable, Weighted Average Remaining Contractual Life (Years)	5 years 3 months 18 days
$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 3 months 18 days
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 3 months 18 days
$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	50,250
Options Outstanding, Weighed Average Exercise Price (dollars per share)	$ 29.69
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	6 years 3 months 18 days
Options Exercisable, Number (shares) | shares	30,150
Options Exercisable, Weighted Average Exercise Price (dollars per share)	$ 29.69
Options Exercisable, Weighted Average Remaining Contractual Life (Years)	6 years 3 months 18 days
$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	40,000
Options Outstanding, Weighed Average Exercise Price (dollars per share)	$ 31.80
Options Outstanding, Weighted Average Remaining Contractual Life (Years)	7 years 3 months 18 days
Options Exercisable, Number (shares) | shares	16,000
Options Exercisable, Weighted Average Exercise Price (dollars per share)	$ 31.80
Options Exercisable, Weighted Average Remaining Contractual Life (Years)	7 years 3 months 18 days

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	Jun. 30, 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	$ 68,451	$ 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	67,491	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	960	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	67,491	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	67,491	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	960	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	960	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	67,491	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	Jun. 30, 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	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	9	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	9	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	280	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	123	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	123	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	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	Jun. 30, 2021	Sep. 30, 2020
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Assets, estimated fair value, nonrecurring	$ 280	$ 1,741
Impaired loans
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Assets, estimated fair value, nonrecurring	123	691
Impaired loans | Market Approach Valuation Technique
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Assets, estimated fair value, nonrecurring	123	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	Jun. 30, 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	503,726	314,452
CDs held for investment	31,218	65,545
Investment securities	119,805	85,797
Investments in equity securities	960	977
FHLB stock	2,103	1,922
Other investments, at cost	3,000	3,000
Loans held for sale	3,359	4,509
Loans receivable, net	1,001,565	1,013,875
Accrued interest receivable	4,260	4,484
Certificates of deposit	139,965	158,524
FHLB borrowings	5,000	10,000
Accrued interest payable	154	274
Fair Value
Fair value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	503,726	314,452
CDs held for investment	31,218	65,545
Investment securities	121,087	87,734
Investments in equity securities	960	977
FHLB stock	2,103	1,922
Other investments, at cost	3,000	3,000
Loans held for sale	3,467	4,664
Loans receivable, net	1,022,389	1,034,876
Accrued interest receivable	4,260	4,484
Certificates of deposit	141,225	160,921
FHLB borrowings	5,039	10,167
Accrued interest payable	154	274
Fair Value | Fair Value, Inputs, Level 1
Fair value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	503,726	314,452
CDs held for investment	31,218	65,545
Investment securities	18,816	0
Investments in equity securities	960	977
FHLB stock	2,103	1,922
Other investments, at cost	3,000	3,000
Loans held for sale	3,467	4,664
Loans receivable, net	0	0
Accrued interest receivable	4,260	4,484
Certificates of deposit	0	0
FHLB borrowings	0	0
Accrued interest payable	154	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	102,271	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	0	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	1,022,389	1,034,876
Accrued interest receivable	0	0
Certificates of deposit	141,225	160,921
FHLB borrowings	5,039	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		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Deposit Account
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	$ 948	$ 858	$ 2,943	$ 3,136
Credit and Debit Card
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	1,363	1,069	3,755	3,178
Asset Management
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	64	81	243	211
Investment Advice
Disaggregation of Revenue [Line Items]
Revenue from contract with customer	$ 8	$ 0	$ 14	$ 13