Note 3 - Loans and Allowance for Credit Losses - Recorded Investment by Risk Category (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Jun. 30, 2025
Loans, Total	$ 834,882		$ 813,458
Loans, Total, Write-offs	123	$ 126
Commercial Portfolio Segment [Member]
Loans, Year One	8,631		31,506
Loans, Year Two	32,252		13,729
Loans, Year Three	12,680		17,295
Loans, Year Four	15,844		17,004
Loans, Year Five	15,371		4,979
Loans, Prior	8,883		4,822
Loans, Revolving	23,757		24,087
Loans, Revolving Converted to Term	90		91
Loans, Total	117,508		113,513
Loans, Year One, Write-offs	0		49
Loans, Year Two, Write-offs	0		40
Loans, Year Three, Write-offs	0		0
Loans, Year Four, Write-offs	0		0
Loans, Year Five, Write-offs	0		64
Loans, Prior, Write-offs	0		0
Loans, Loans, Revolving, Write-offs	0		0
Loans, Revolving Converted to Term, Write-offs	0		100
Loans, Total, Write-offs	0		253
Commercial Portfolio Segment [Member] | Pass [Member]
Loans, Year One	8,631		31,506
Loans, Year Two	32,252		13,318
Loans, Year Three	12,539		17,215
Loans, Year Four	15,779		16,821
Loans, Year Five	15,230		4,604
Loans, Prior	8,397		4,677
Loans, Revolving	22,957		23,164
Loans, Revolving Converted to Term	90		91
Loans, Total	115,875		111,396
Commercial Portfolio Segment [Member] | Special Mention [Member]
Loans, Year One	0		0
Loans, Year Two	0		411
Loans, Year Three	141		80
Loans, Year Four	65		183
Loans, Year Five	141		375
Loans, Prior	486		145
Loans, Revolving	800		923
Loans, Revolving Converted to Term	0		0
Loans, Total	1,633		2,117
Commercial Portfolio Segment [Member] | Substandard [Member]
Loans, Year One	0		0
Loans, Year Two	0		0
Loans, Year Three	0		0
Loans, Year Four	0		0
Loans, Year Five	0		0
Loans, Prior	0		0
Loans, Revolving	0		0
Loans, Revolving Converted to Term	0		0
Loans, Total	0		0
Commercial Portfolio Segment [Member] | Doubtful [Member]
Loans, Year One	0		0
Loans, Year Two	0		0
Loans, Year Three	0		0
Loans, Year Four	0		0
Loans, Year Five	0		0
Loans, Prior	0		0
Loans, Revolving	0		0
Loans, Revolving Converted to Term	0		0
Loans, Total	0		0
Residential Portfolio Segment [Member]
Loans, Year One	7,126		20,297
Loans, Year Two	21,816		18,547
Loans, Year Three	17,577		19,588
Loans, Year Four	19,215		27,590
Loans, Year Five	27,071		45,186
Loans, Prior	82,739		41,668
Loans, Revolving	31,139		28,663
Loans, Revolving Converted to Term	58		63
Loans, Total	206,741		201,602
Loans, Year One, Write-offs	0		0
Loans, Year Two, Write-offs	0		0
Loans, Year Three, Write-offs	0		0
Loans, Year Four, Write-offs	0		0
Loans, Year Five, Write-offs	0		0
Loans, Prior, Write-offs	0		0
Loans, Loans, Revolving, Write-offs	0		0
Loans, Revolving Converted to Term, Write-offs	0		0
Loans, Total, Write-offs	(0)	(0)	0
Residential Portfolio Segment [Member] | Performing Financial Instruments [Member]
Loans, Year One	7,126		20,297
Loans, Year Two	21,816		18,547
Loans, Year Three	17,577		19,403
Loans, Year Four	19,030		27,391
Loans, Year Five	26,894		45,186
Loans, Prior	82,529		41,453
Loans, Revolving	31,139		28,663
Loans, Revolving Converted to Term	58		63
Loans, Total	206,169		201,003
Residential Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]
Loans, Year One	0		0
Loans, Year Two	0		0
Loans, Year Three	0		185
Loans, Year Four	185		199
Loans, Year Five	177		0
Loans, Prior	210		215
Loans, Revolving	0		0
Loans, Revolving Converted to Term	0		0
Loans, Total	572		599
Farmland [Member]
Loans, Year One	746		6,063
Loans, Year Two	8,830		1,759
Loans, Year Three	1,756		5,696
Loans, Year Four	5,650		5,648
Loans, Year Five	5,597		5,084
Loans, Prior	20,613		16,448
Loans, Revolving	1,670		1,225
Loans, Revolving Converted to Term	122		127
Loans, Total	44,984		42,050
Loans, Year One, Write-offs	0		0
Loans, Year Two, Write-offs	0		0
Loans, Year Three, Write-offs	0		0
Loans, Year Four, Write-offs	0		0
Loans, Year Five, Write-offs	0		0
Loans, Prior, Write-offs	0		0
Loans, Loans, Revolving, Write-offs	0		0
Loans, Revolving Converted to Term, Write-offs	0		0
Loans, Total, Write-offs	(0)	(0)	0
Farmland [Member] | Pass [Member]
Loans, Year One	746		6,063
Loans, Year Two	8,830		1,759
Loans, Year Three	1,756		5,696
Loans, Year Four	5,650		5,648
Loans, Year Five	5,597		5,084
Loans, Prior	20,613		16,448
Loans, Revolving	1,670		1,225
Loans, Revolving Converted to Term	122		127
Loans, Total	44,984		42,050
Farmland [Member] | Special Mention [Member]
Loans, Year One	0		0
Loans, Year Two	0		0
Loans, Year Three	0		0
Loans, Year Four	0		0
Loans, Year Five	0		0
Loans, Prior	0		0
Loans, Revolving	0		0
Loans, Revolving Converted to Term	0		0
Loans, Total	0		0
Farmland [Member] | Substandard [Member]
Loans, Year One	0		0
Loans, Year Two	0		0
Loans, Year Three	0		0
Loans, Year Four	0		0
Loans, Year Five	0		0
Loans, Prior	0		0
Loans, Revolving	0		0
Loans, Revolving Converted to Term	0		0
Loans, Total	0		0
Farmland [Member] | Doubtful [Member]
Loans, Year One	0		0
Loans, Year Two	0		0
Loans, Year Three	0		0
Loans, Year Four	0		0
Loans, Year Five	0		0
Loans, Prior	0		0
Loans, Revolving	0		0
Loans, Revolving Converted to Term	0		0
Loans, Total	0		0
Consumer Portfolio Segment [Member]
Loans, Year One	14,985		66,567
Loans, Year Two	63,065		20,500
Loans, Year Three	18,327		16,151
Loans, Year Four	13,980		6,979
Loans, Year Five	5,836		1,838
Loans, Prior	1,582		186
Loans, Revolving	0		95
Loans, Revolving Converted to Term	0		0
Loans, Total	117,775		112,316
Loans, Year One, Write-offs	5		49
Loans, Year Two, Write-offs	4		26
Loans, Year Three, Write-offs	16		199
Loans, Year Four, Write-offs	49		251
Loans, Year Five, Write-offs	38		19
Loans, Prior, Write-offs	11		2
Loans, Loans, Revolving, Write-offs	0		0
Loans, Revolving Converted to Term, Write-offs	0		0
Loans, Total, Write-offs	123	126	546
Consumer Portfolio Segment [Member] | Performing Financial Instruments [Member]
Loans, Year One	14,985		66,567
Loans, Year Two	63,065		20,500
Loans, Year Three	18,327		16,079
Loans, Year Four	13,980		6,950
Loans, Year Five	5,836		1,838
Loans, Prior	1,566		186
Loans, Revolving	0		95
Loans, Revolving Converted to Term	0		0
Loans, Total	117,759		112,215
Consumer Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]
Loans, Year One	0		0
Loans, Year Two	0		0
Loans, Year Three	0		72
Loans, Year Four	0		29
Loans, Year Five	0		0
Loans, Prior	16		0
Loans, Revolving	0		0
Loans, Revolving Converted to Term	0		0
Loans, Total	16		101
Commercial Real Estate Portfolio Segment [Member]
Loans, Total, Write-offs	(0)	(0)
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Loans [Member]
Loans, Year One	4,283		14,670
Loans, Year Two	16,128		23,624
Loans, Year Three	23,671		21,391
Loans, Year Four	21,054		26,435
Loans, Year Five	26,010		19,887
Loans, Prior	69,447		51,804
Loans, Revolving	5,807		4,863
Loans, Revolving Converted to Term	0		0
Loans, Total	166,400		162,674
Loans, Year One, Write-offs	0		0
Loans, Year Two, Write-offs	0		0
Loans, Year Three, Write-offs	0		0
Loans, Year Four, Write-offs	0		0
Loans, Year Five, Write-offs	0		0
Loans, Prior, Write-offs	0		0
Loans, Loans, Revolving, Write-offs	0		0
Loans, Revolving Converted to Term, Write-offs	0		0
Loans, Total, Write-offs	0		0
Commercial Real Estate Portfolio Segment [Member] | Non-owner Occupied Loans [Member]
Loans, Year One	8,032		28,937
Loans, Year Two	27,008		13,970
Loans, Year Three	10,903		35,895
Loans, Year Four	35,459		18,667
Loans, Year Five	18,467		21,883
Loans, Prior	63,003		42,916
Loans, Revolving	1,580		1,500
Loans, Revolving Converted to Term	0		0
Loans, Total	164,452		163,768
Loans, Year One, Write-offs	0		0
Loans, Year Two, Write-offs	0		0
Loans, Year Three, Write-offs	0		0
Loans, Year Four, Write-offs	0		0
Loans, Year Five, Write-offs	0		0
Loans, Prior, Write-offs	0		0
Loans, Loans, Revolving, Write-offs	0		0
Loans, Revolving Converted to Term, Write-offs	0		0
Loans, Total, Write-offs	0		0
Commercial Real Estate Portfolio Segment [Member] | Pass [Member] | Owner Occupied Loans [Member]
Loans, Year One	4,283		12,350
Loans, Year Two	13,819		16,042
Loans, Year Three	16,134		21,391
Loans, Year Four	21,054		26,435
Loans, Year Five	26,010		19,268
Loans, Prior	66,397		48,946
Loans, Revolving	5,647		4,452
Loans, Revolving Converted to Term	0		0
Loans, Total	153,344		148,884
Commercial Real Estate Portfolio Segment [Member] | Pass [Member] | Non-owner Occupied Loans [Member]
Loans, Year One	8,032		28,937
Loans, Year Two	27,008		13,970
Loans, Year Three	10,903		35,895
Loans, Year Four	35,459		18,667
Loans, Year Five	18,467		21,883
Loans, Prior	63,003		42,916
Loans, Revolving	1,580		1,500
Loans, Revolving Converted to Term	0		0
Loans, Total	164,452		163,768
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member] | Owner Occupied Loans [Member]
Loans, Year One	0		2,320
Loans, Year Two	2,309		7,582
Loans, Year Three	7,537		0
Loans, Year Four	0		0
Loans, Year Five	0		619
Loans, Prior	2,975		2,701
Loans, Revolving	160		411
Loans, Revolving Converted to Term	0		0
Loans, Total	12,981		13,633
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member] | Non-owner Occupied Loans [Member]
Loans, Year One	0		0
Loans, Year Two	0		0
Loans, Year Three	0		0
Loans, Year Four	0		0
Loans, Year Five	0		0
Loans, Prior	0		0
Loans, Revolving	0		0
Loans, Revolving Converted to Term	0		0
Loans, Total	0		0
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member] | Owner Occupied Loans [Member]
Loans, Year One	0		0
Loans, Year Two	0		0
Loans, Year Three	0		0
Loans, Year Four	0		0
Loans, Year Five	0		0
Loans, Prior	75		157
Loans, Revolving	0		0
Loans, Revolving Converted to Term	0		0
Loans, Total	75		157
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member] | Non-owner Occupied Loans [Member]
Loans, Year One	0		0
Loans, Year Two	0		0
Loans, Year Three	0		0
Loans, Year Four	0		0
Loans, Year Five	0		0
Loans, Prior	0		0
Loans, Revolving	0		0
Loans, Revolving Converted to Term	0		0
Loans, Total	0		0
Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member] | Owner Occupied Loans [Member]
Loans, Year One	0		0
Loans, Year Two	0		0
Loans, Year Three	0		0
Loans, Year Four	0		0
Loans, Year Five	0		0
Loans, Prior	0		0
Loans, Revolving	0		0
Loans, Revolving Converted to Term	0		0
Loans, Total	0		0
Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member] | Non-owner Occupied Loans [Member]
Loans, Year One	0		0
Loans, Year Two	0		0
Loans, Year Three	0		0
Loans, Year Four	0		0
Loans, Year Five	0		0
Loans, Prior	0		0
Loans, Revolving	0		0
Loans, Revolving Converted to Term	0		0
Loans, Total	0		0
Land Development [Member]
Loans, Year One	462		4,922
Loans, Year Two	5,342		7,912
Loans, Year Three	7,133		1,950
Loans, Year Four	1,936		324
Loans, Year Five	317		332
Loans, Prior	750		494
Loans, Revolving	1,082		1,601
Loans, Revolving Converted to Term	0		0
Loans, Total	17,022		17,535
Loans, Year One, Write-offs	0		0
Loans, Year Two, Write-offs	0		0
Loans, Year Three, Write-offs	0		0
Loans, Year Four, Write-offs	0		0
Loans, Year Five, Write-offs	0		0
Loans, Prior, Write-offs	0		0
Loans, Loans, Revolving, Write-offs	0		0
Loans, Revolving Converted to Term, Write-offs	0		0
Loans, Total, Write-offs	(0)	$ (0)	0
Land Development [Member] | Pass [Member]
Loans, Year One	462		4,922
Loans, Year Two	5,342		7,912
Loans, Year Three	7,133		1,950
Loans, Year Four	1,936		324
Loans, Year Five	317		332
Loans, Prior	750		494
Loans, Revolving	1,082		1,601
Loans, Revolving Converted to Term	0		0
Loans, Total	17,022		17,535
Land Development [Member] | Special Mention [Member]
Loans, Year One	0		0
Loans, Year Two	0		0
Loans, Year Three	0		0
Loans, Year Four	0		0
Loans, Year Five	0		0
Loans, Prior	0		0
Loans, Revolving	0		0
Loans, Revolving Converted to Term	0		0
Loans, Total	0		0
Land Development [Member] | Substandard [Member]
Loans, Year One	0		0
Loans, Year Two	0		0
Loans, Year Three	0		0
Loans, Year Four	0		0
Loans, Year Five	0		0
Loans, Prior	0		0
Loans, Revolving	0		0
Loans, Revolving Converted to Term	0		0
Loans, Total	0		0
Land Development [Member] | Doubtful [Member]
Loans, Year One	0		0
Loans, Year Two	0		0
Loans, Year Three	0		0
Loans, Year Four	0		0
Loans, Year Five	0		0
Loans, Prior	0		0
Loans, Revolving	0		0
Loans, Revolving Converted to Term	0		0
Loans, Total	0		0
Residential Real Estate and Consumer Segments [Member]
Loans, Year One	22,111		86,864
Loans, Year Two	84,881		39,047
Loans, Year Three	35,904		35,739
Loans, Year Four	33,195		34,569
Loans, Year Five	32,907		47,024
Loans, Prior	84,321		41,854
Loans, Revolving	31,139		28,758
Loans, Revolving Converted to Term	58		63
Loans, Total	324,516		313,918
Residential Real Estate and Consumer Segments [Member] | Performing Financial Instruments [Member]
Loans, Year One	22,111		86,864
Loans, Year Two	84,881		39,047
Loans, Year Three	35,904		35,482
Loans, Year Four	33,010		34,341
Loans, Year Five	32,730		47,024
Loans, Prior	84,095		41,639
Loans, Revolving	31,139		28,758
Loans, Revolving Converted to Term	58		63
Loans, Total	323,928		313,218
Residential Real Estate and Consumer Segments [Member] | Nonperforming Financial Instruments [Member]
Loans, Year One	0		0
Loans, Year Two	0		0
Loans, Year Three	0		257
Loans, Year Four	185		228
Loans, Year Five	177		0
Loans, Prior	226		215
Loans, Revolving	0		0
Loans, Revolving Converted to Term	0		0
Loans, Total	588		700
Commercial, Commercial Real Estate, Farmland and Land Development Segment [Member]
Loans, Year One	22,154		86,098
Loans, Year Two	89,560		60,994
Loans, Year Three	56,143		82,227
Loans, Year Four	79,943		68,078
Loans, Year Five	65,762		52,165
Loans, Prior	162,696		116,484
Loans, Revolving	33,896		33,276
Loans, Revolving Converted to Term	212		218
Loans, Total	510,366		499,540
Commercial, Commercial Real Estate, Farmland and Land Development Segment [Member] | Pass [Member]
Loans, Year One	22,154		83,778
Loans, Year Two	87,251		53,001
Loans, Year Three	48,465		82,147
Loans, Year Four	79,878		67,895
Loans, Year Five	65,621		51,171
Loans, Prior	159,160		113,481
Loans, Revolving	32,936		31,942
Loans, Revolving Converted to Term	212		218
Loans, Total	495,677		483,633
Commercial, Commercial Real Estate, Farmland and Land Development Segment [Member] | Special Mention [Member]
Loans, Year One	0		2,320
Loans, Year Two	2,309		7,993
Loans, Year Three	7,678		80
Loans, Year Four	65		183
Loans, Year Five	141		994
Loans, Prior	3,461		2,846
Loans, Revolving	960		1,334
Loans, Revolving Converted to Term	0		0
Loans, Total	14,614		15,750
Commercial, Commercial Real Estate, Farmland and Land Development Segment [Member] | Substandard [Member]
Loans, Year One	0		0
Loans, Year Two	0		0
Loans, Year Three	0		0
Loans, Year Four	0		0
Loans, Year Five	0		0
Loans, Prior	75		157
Loans, Revolving	0		0
Loans, Revolving Converted to Term	0		0
Loans, Total	75		157
Commercial, Commercial Real Estate, Farmland and Land Development Segment [Member] | Doubtful [Member]
Loans, Year One	0		0
Loans, Year Two	0		0
Loans, Year Three	0		0
Loans, Year Four	0		0
Loans, Year Five	0		0
Loans, Prior	0		0
Loans, Revolving	0		0
Loans, Revolving Converted to Term	0		0
Loans, Total	$ 0		$ 0