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

Note 3 - Loans and Allowance for Credit Losses - Aging of Bank's Loan Portfolio (Details)

Note 3 - Loans and Allowance for Credit Losses - Aging of Bank's Loan Portfolio (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Loans	$ 106,841	$ 102,991
Non-accrual	139	154
First Mortgage Loans [Member]
Loans	106,576	102,742
First Mortgage Loans [Member] \| One To Four Family Residential [Member]
Loans	97,934	95,584
Non-accrual	139	154
First Mortgage Loans [Member] \| Multifamily [Member]
Loans	3,142	3,237
Non-accrual	0	0
First Mortgage Loans [Member] \| Commercial Real Estate [Member]
Loans	3,738	3,921
Non-accrual	0	0
First Mortgage Loans [Member] \| Construction Loans [Member]
Loans	1,762	0
Non-accrual	0
Consumer Portfolio Segment [Member]
Loans	265	249
Non-accrual	0	0
Financial Asset, 31 to 89 Days Past Due [Member]
Loans	0	28
Financial Asset, 31 to 89 Days Past Due [Member] \| First Mortgage Loans [Member] \| One To Four Family Residential [Member]
Loans	0	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	64	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	64	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	203	182
Financial Asset, Past Due [Member] \| First Mortgage Loans [Member] \| One To Four Family Residential [Member]
Loans	139	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	64	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	106,638	102,809
Financial Asset, Not Past Due [Member] \| First Mortgage Loans [Member] \| One To Four Family Residential [Member]
Loans	97,795	95,402
Financial Asset, Not Past Due [Member] \| First Mortgage Loans [Member] \| Multifamily [Member]
Loans	3,142	3,237
Financial Asset, Not Past Due [Member] \| First Mortgage Loans [Member] \| Commercial Real Estate [Member]
Loans	3,674	3,921
Financial Asset, Not Past Due [Member] \| First Mortgage Loans [Member] \| Construction Loans [Member]
Loans	1,762
Financial Asset, Not Past Due [Member] \| Consumer Portfolio Segment [Member]
Loans	$ 265	$ 249