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

Note 4 - Allowance for Credit Losses - Aging of Bank's Loan Portfolio (Details)

Note 4 - Allowance for Credit Losses - Aging of Bank's Loan Portfolio (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Loans	$ 129,464	$ 130,907
Non-Accrual	284	0
First Mortgage Loans [Member]
Loans	129,196	130,625
First Mortgage Loans [Member] \| One To Four Family Residential [Member]
Loans	118,222	119,409
Non-Accrual	284	0
First Mortgage Loans [Member] \| Multifamily [Member]
Loans	3,240	3,368
Non-Accrual	0	0
First Mortgage Loans [Member] \| Commercial Real Estate [Member]
Loans	3,813	4,197
Non-Accrual	0	0
First Mortgage Loans [Member] \| Construction Loans [Member]
Loans	3,921	3,651
Non-Accrual	0	0
Consumer Portfolio Segment [Member]
Loans	268	282
Non-Accrual	0	0
Financial Asset, 31 to 89 Days Past Due [Member]
Loans	641	371
Financial Asset, 31 to 89 Days Past Due [Member] \| First Mortgage Loans [Member] \| One To Four Family Residential [Member]
Loans	641	371
Financial Asset, 31 to 89 Days Past Due [Member] \| First Mortgage Loans [Member] \| Multifamily [Member]
Loans	0	0
Financial Asset, 31 to 89 Days Past Due [Member] \| First Mortgage Loans [Member] \| Commercial Real Estate [Member]
Loans	0	0
Financial Asset, 31 to 89 Days Past Due [Member] \| First Mortgage Loans [Member] \| Construction Loans [Member]
Loans	0	0
Financial Asset, 31 to 89 Days Past Due [Member] \| Consumer Portfolio Segment [Member]
Loans	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] \| First Mortgage Loans [Member] \| One To Four Family Residential [Member]
Loans	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] \| First Mortgage Loans [Member] \| Multifamily [Member]
Loans	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] \| First Mortgage Loans [Member] \| Commercial Real Estate [Member]
Loans	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] \| First Mortgage Loans [Member] \| Construction Loans [Member]
Loans	0	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] \| Consumer Portfolio Segment [Member]
Loans	0	0
Financial Asset, Past Due [Member]
Loans	925	371
Financial Asset, Past Due [Member] \| First Mortgage Loans [Member] \| One To Four Family Residential [Member]
Loans	925	371
Financial Asset, Past Due [Member] \| First Mortgage Loans [Member] \| Multifamily [Member]
Loans	0	0
Financial Asset, Past Due [Member] \| First Mortgage Loans [Member] \| Commercial Real Estate [Member]
Loans	0	0
Financial Asset, Past Due [Member] \| First Mortgage Loans [Member] \| Construction Loans [Member]
Loans	0	0
Financial Asset, Past Due [Member] \| Consumer Portfolio Segment [Member]
Loans	0	0
Financial Asset, Not Past Due [Member]
Loans	128,539	130,536
Financial Asset, Not Past Due [Member] \| First Mortgage Loans [Member] \| One To Four Family Residential [Member]
Loans	117,297	119,038
Financial Asset, Not Past Due [Member] \| First Mortgage Loans [Member] \| Multifamily [Member]
Loans	3,240	3,368
Financial Asset, Not Past Due [Member] \| First Mortgage Loans [Member] \| Commercial Real Estate [Member]
Loans	3,813	4,197
Financial Asset, Not Past Due [Member] \| First Mortgage Loans [Member] \| Construction Loans [Member]
Loans	3,921	3,651
Financial Asset, Not Past Due [Member] \| Consumer Portfolio Segment [Member]
Loans	$ 268	$ 282