NSTS Bancorp, Inc. Annual report [Section 13 and 15(d), not S-K Item 405]

Annual report [Section 13 and 15(d), not S-K Item 405]

Note 4 - Allowance for Loan Losses - Changes in Allowance for Loan Losses (Details)

Note 4 - Allowance for Loan Losses - Changes in Allowance for Loan Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Beginning balance	$ 1,176	$ 624
Charge-offs	0	0
Recoveries	0	0
Net recoveries (charge-offs)	0	0
(Release of) Provision for credit losses	25	168
Ending balance	1,201	1,176
Accounting Standards Update 2016-13 [Member] \| Cumulative Effect, Period of Adoption, Adjustment [Member]
Beginning balance		384
First Mortgage Loans [Member] \| One To Four Family Residential [Member]
Beginning balance	1,094	581
Charge-offs	0	0
Recoveries	0	0
Net recoveries (charge-offs)	0	0
(Release of) Provision for credit losses	(38)	178
Ending balance	1,056	1,094
First Mortgage Loans [Member] \| One To Four Family Residential [Member] \| Accounting Standards Update 2016-13 [Member] \| Cumulative Effect, Period of Adoption, Adjustment [Member]
Beginning balance		335
First Mortgage Loans [Member] \| Multifamily [Member]
Beginning balance	40	19
Charge-offs	0	0
Recoveries	0	0
Net recoveries (charge-offs)	0	0
(Release of) Provision for credit losses	(3)	(2)
Ending balance	37	40
First Mortgage Loans [Member] \| Multifamily [Member] \| Accounting Standards Update 2016-13 [Member] \| Cumulative Effect, Period of Adoption, Adjustment [Member]
Beginning balance		23
First Mortgage Loans [Member] \| Commercial Real Estate [Member]
Beginning balance	37	19
Charge-offs	0	0
Recoveries	0	0
Net recoveries (charge-offs)	0	0
(Release of) Provision for credit losses	4	(11)
Ending balance	41	37
First Mortgage Loans [Member] \| Commercial Real Estate [Member] \| Accounting Standards Update 2016-13 [Member] \| Cumulative Effect, Period of Adoption, Adjustment [Member]
Beginning balance		29
First Mortgage Loans [Member] \| Construction Loans [Member]
Beginning balance	4	0
Charge-offs	0	0
Recoveries	0	0
Net recoveries (charge-offs)	0	0
(Release of) Provision for credit losses	61	4
Ending balance	65	4
First Mortgage Loans [Member] \| Construction Loans [Member] \| Accounting Standards Update 2016-13 [Member] \| Cumulative Effect, Period of Adoption, Adjustment [Member]
Beginning balance		0
Consumer Portfolio Segment [Member]
Beginning balance	1	5
Charge-offs	0	0
Recoveries	0	0
Net recoveries (charge-offs)	0	0
(Release of) Provision for credit losses	1	(1)
Ending balance	$ 2	1
Consumer Portfolio Segment [Member] \| Accounting Standards Update 2016-13 [Member] \| Cumulative Effect, Period of Adoption, Adjustment [Member]
Beginning balance		$ (3)