NSTS Bancorp, Inc. Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

Note 3 - Loans and Allowance for Loan Losses - Changes in Allowance for Loan Losses (Details)

Note 3 - Loans and Allowance for Loan Losses - Changes in Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Beginning balance	$ 1,176	$ 624	$ 624
Charge-offs	0	0	0
Recoveries	0	0
Net recoveries (charge-offs)	0	0
(Release of) provision for credit losses	1	(29)
Ending balance	1,177	979	1,176
Accounting Standards Update 2016-13 [Member] \| Cumulative Effect, Period of Adoption, Adjustment [Member]
Beginning balance		384	384
First Mortgage Loans [Member] \| One To Four Family Residential [Member]
Beginning balance	1,094	581	581
Charge-offs	0	0	0
Recoveries	0	0
Net recoveries (charge-offs)	0	0
(Release of) provision for credit losses	(3)	(26)
Ending balance	1,091	890	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	335
First Mortgage Loans [Member] \| Multifamily [Member]
Beginning balance	40	19	19
Charge-offs	0	0	0
Recoveries	0	0
Net recoveries (charge-offs)	0	0
(Release of) provision for credit losses	(4)	(1)
Ending balance	36	41	40
First Mortgage Loans [Member] \| Multifamily [Member] \| Accounting Standards Update 2016-13 [Member] \| Cumulative Effect, Period of Adoption, Adjustment [Member]
Beginning balance		23	23
First Mortgage Loans [Member] \| Commercial Real Estate [Member]
Beginning balance	37	19	19
Charge-offs	0	0	0
Recoveries	0	0
Net recoveries (charge-offs)	0	0
(Release of) provision for credit losses	0	(2)
Ending balance	37	46	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	29
First Mortgage Loans [Member] \| Construction Loans [Member]
Beginning balance	4	0	0
Charge-offs	0	0	0
Recoveries	0	0
Net recoveries (charge-offs)	0	0
(Release of) provision for credit losses	7	0
Ending balance	11	0	4
First Mortgage Loans [Member] \| Construction Loans [Member] \| Accounting Standards Update 2016-13 [Member] \| Cumulative Effect, Period of Adoption, Adjustment [Member]
Beginning balance		0	0
Consumer Portfolio Segment [Member]
Beginning balance	1	5	5
Charge-offs	0	0
Recoveries	0	0
Net recoveries (charge-offs)	0	0
(Release of) provision for credit losses	1	0
Ending balance	$ 2	2	1
Consumer Portfolio Segment [Member] \| Accounting Standards Update 2016-13 [Member] \| Cumulative Effect, Period of Adoption, Adjustment [Member]
Beginning balance		$ (3)	$ (3)