NSTS Bancorp, Inc. Annual report pursuant to Section 13 and 15(d)

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

Note 4 - Allowance for Loan Losses - Aging of Bank's Loan Portfolio (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Loans	$ 120,783	$ 102,991
Non-accrual	200	154
First Mortgage Loans [Member]
Loans	120,535	102,742
First Mortgage Loans [Member] \| One To Four Family Residential [Member]
Loans	111,081	95,584
Non-accrual	200	154
First Mortgage Loans [Member] \| Multifamily [Member]
Loans	3,111	3,237
Non-accrual	0	0
First Mortgage Loans [Member] \| Commercial Real Estate [Member]
Loans	3,835	3,921
Non-accrual	0	0
First Mortgage Loans [Member] \| Construction Loans [Member]
Loans	2,508	0
Non-accrual	0
Consumer Portfolio Segment [Member]
Loans	248	249
Non-accrual	0	0
Financial Asset, 31 to 89 Days Past Due [Member]
Loans	131	28
Financial Asset, 31 to 89 Days Past Due [Member] \| First Mortgage Loans [Member] \| One To Four Family Residential [Member]
Loans	131	28
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
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
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	331	182
Financial Asset, Past Due [Member] \| First Mortgage Loans [Member] \| One To Four Family Residential [Member]
Loans	331	182
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
Financial Asset, Past Due [Member] \| Consumer Portfolio Segment [Member]
Loans	0	0
Financial Asset, Not Past Due [Member]
Loans	120,452	102,809
Financial Asset, Not Past Due [Member] \| First Mortgage Loans [Member] \| One To Four Family Residential [Member]
Loans	110,750	95,402
Financial Asset, Not Past Due [Member] \| First Mortgage Loans [Member] \| Multifamily [Member]
Loans	3,111	3,237
Financial Asset, Not Past Due [Member] \| First Mortgage Loans [Member] \| Commercial Real Estate [Member]
Loans	3,835	3,921
Financial Asset, Not Past Due [Member] \| First Mortgage Loans [Member] \| Construction Loans [Member]
Loans	2,508
Financial Asset, Not Past Due [Member] \| Consumer Portfolio Segment [Member]
Loans	$ 248	$ 249