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 - Credit Risk Profile of Loan Portfolio (Details)

Note 3 - Loans and Allowance for Loan Losses - Credit Risk Profile of Loan Portfolio (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Loan, current	$ 7,568		$ 26,211
Loan, one year before	24,496		19,045
Loan, two years before	18,931		19,972
Loan, three years before	19,781
Loan, prior	52,799
Loan, revolving	2,505		1,564
Loan, revolving converted to term loans	0		0
Loans	126,080		120,783
Current year-to-date gross write-offs, current	0		0
Current year-to-date gross write-offs, one year before	0		0
Current year-to-date gross write-offs, two years before	0		0
Loan, three years before, writeoff	0
Loan, prior, write-offs	0
Loan, revolving, writeoff	0		0
Current year-to-date gross write-offs,Revolving, Converted to Term Loan	0		0
Charge-offs	0	$ 0	0
Loan, prior			53,991
Current year-to-date gross write-offs, prior			0
First Mortgage Loans [Member]
Loans	125,854		120,535
First Mortgage Loans [Member] \| One To Four Family Residential [Member]
Loan, current	7,303		23,395
Loan, one year before	21,211		18,950
Loan, two years before	18,844		19,605
Loan, three years before	19,421
Loan, prior	46,624
Loan, revolving	2,297		1,414
Loan, revolving converted to term loans	0		0
Loans	115,700		111,081
Current year-to-date gross write-offs, current	0		0
Current year-to-date gross write-offs, one year before	0		0
Current year-to-date gross write-offs, two years before	0		0
Loan, three years before, writeoff	0
Loan, prior, write-offs	0
Loan, revolving, writeoff	0		0
Current year-to-date gross write-offs,Revolving, Converted to Term Loan	0		0
Charge-offs	0	0	0
Loan, prior			47,717
Current year-to-date gross write-offs, prior			0
First Mortgage Loans [Member] \| One To Four Family Residential [Member] \| Pass [Member]
Loan, current	7,303		23,395
Loan, one year before	21,211		18,950
Loan, two years before	18,844		19,605
Loan, three years before	19,421
Loan, prior	46,387
Loan, revolving	2,297		1,414
Loan, revolving converted to term loans	0		0
Loans	115,463		110,881
Loan, prior			47,517
First Mortgage Loans [Member] \| One To Four Family Residential [Member] \| Special Mention [Member]
Loan, current	0		0
Loan, one year before	0		0
Loan, two years before	0		0
Loan, three years before	0
Loan, prior	0
Loan, revolving	0		0
Loan, revolving converted to term loans	0		0
Loans	0		0
Loan, prior			0
First Mortgage Loans [Member] \| One To Four Family Residential [Member] \| Substandard [Member]
Loan, current	0		0
Loan, one year before	0		0
Loan, two years before	0		0
Loan, three years before	0
Loan, prior	237
Loan, revolving	0		0
Loan, revolving converted to term loans	0		0
Loans	237		200
Loan, prior			200
First Mortgage Loans [Member] \| Multifamily [Member]
Loan, current	0		0
Loan, one year before	0		0
Loan, two years before	0		239
Loan, three years before	236
Loan, prior	2,845
Loan, revolving	0		0
Loan, revolving converted to term loans	0		0
Loans	3,081		3,111
Current year-to-date gross write-offs, current	0		0
Current year-to-date gross write-offs, one year before	0		0
Current year-to-date gross write-offs, two years before	0		0
Loan, three years before, writeoff	0
Loan, prior, write-offs	0
Loan, revolving, writeoff	0		0
Current year-to-date gross write-offs,Revolving, Converted to Term Loan	0		0
Charge-offs	0	0	0
Loan, prior			2,872
Current year-to-date gross write-offs, prior			0
First Mortgage Loans [Member] \| Multifamily [Member] \| Pass [Member]
Loan, current	0		0
Loan, one year before	0		0
Loan, two years before	0		239
Loan, three years before	236
Loan, prior	2,845
Loan, revolving	0		0
Loan, revolving converted to term loans	0		0
Loans	3,081		3,111
Loan, prior			2,872
First Mortgage Loans [Member] \| Multifamily [Member] \| Special Mention [Member]
Loan, current	0		0
Loan, one year before	0		0
Loan, two years before	0		0
Loan, three years before	0
Loan, prior	0
Loan, revolving	0		0
Loan, revolving converted to term loans	0		0
Loans	0		0
Loan, prior			0
First Mortgage Loans [Member] \| Multifamily [Member] \| Substandard [Member]
Loan, current	0		0
Loan, one year before	0		0
Loan, two years before	0		0
Loan, three years before	0
Loan, prior	0
Loan, revolving	0		0
Loan, revolving converted to term loans	0		0
Loans	0		0
Loan, prior			0
First Mortgage Loans [Member] \| Commercial Real Estate [Member]
Loan, current	10		186
Loan, one year before	184		0
Loan, two years before	0		100
Loan, three years before	99
Loan, prior	3,327
Loan, revolving	208		150
Loan, revolving converted to term loans	0		0
Loans	3,828		3,835
Current year-to-date gross write-offs, current	0		0
Current year-to-date gross write-offs, one year before	0		0
Current year-to-date gross write-offs, two years before	0		0
Loan, three years before, writeoff	0
Loan, prior, write-offs	0
Loan, revolving, writeoff	0		0
Current year-to-date gross write-offs,Revolving, Converted to Term Loan	0		0
Charge-offs	0	0	0
Loan, prior			3,399
Current year-to-date gross write-offs, prior			0
First Mortgage Loans [Member] \| Commercial Real Estate [Member] \| Pass [Member]
Loan, current	10		186
Loan, one year before	184		0
Loan, two years before	0		100
Loan, three years before	99
Loan, prior	3,327
Loan, revolving	208		150
Loan, revolving converted to term loans	0		0
Loans	3,828		3,835
Loan, prior			3,399
First Mortgage Loans [Member] \| Commercial Real Estate [Member] \| Special Mention [Member]
Loan, current	0		0
Loan, one year before	0		0
Loan, two years before	0		0
Loan, three years before	0
Loan, prior	0
Loan, revolving	0		0
Loan, revolving converted to term loans	0		0
Loans	0		0
Loan, prior			0
First Mortgage Loans [Member] \| Commercial Real Estate [Member] \| Substandard [Member]
Loan, current	0		0
Loan, one year before	0		0
Loan, two years before	0		0
Loan, three years before	0
Loan, prior	0
Loan, revolving	0		0
Loan, revolving converted to term loans	0		0
Loans	0		0
Loan, prior			0
First Mortgage Loans [Member] \| Construction Loans [Member]
Loan, current	244		2,508
Loan, one year before	3,001		0
Loan, two years before	0		0
Loan, three years before	0
Loan, prior	0
Loan, revolving	0		0
Loan, revolving converted to term loans	0		0
Loans	3,245		2,508
Current year-to-date gross write-offs, current	0		0
Current year-to-date gross write-offs, one year before	0		0
Current year-to-date gross write-offs, two years before	0		0
Loan, three years before, writeoff	0
Loan, prior, write-offs	0
Loan, revolving, writeoff	0		0
Current year-to-date gross write-offs,Revolving, Converted to Term Loan	0		0
Charge-offs	0	0	0
Loan, prior			0
Current year-to-date gross write-offs, prior			0
First Mortgage Loans [Member] \| Construction Loans [Member] \| Pass [Member]
Loan, current	244		2,508
Loan, one year before	3,001		0
Loan, two years before	0		0
Loan, three years before	0
Loan, prior	0
Loan, revolving	0		0
Loan, revolving converted to term loans	0		0
Loans	3,245		2,508
Loan, prior			0
First Mortgage Loans [Member] \| Construction Loans [Member] \| Special Mention [Member]
Loan, current	0		0
Loan, one year before	0		0
Loan, two years before	0		0
Loan, three years before	0
Loan, prior	0
Loan, revolving	0		0
Loan, revolving converted to term loans	0		0
Loans	0		0
Loan, prior			0
First Mortgage Loans [Member] \| Construction Loans [Member] \| Substandard [Member]
Loan, current	0		0
Loan, one year before	0		0
Loan, two years before	0		0
Loan, three years before	0
Loan, prior	0
Loan, revolving	0		0
Loan, revolving converted to term loans	0		0
Loans	0		0
Loan, prior			0
Consumer Portfolio Segment [Member]
Loan, current	11		122
Loan, one year before	100		95
Loan, two years before	87		28
Loan, three years before	25
Loan, prior	3
Loan, revolving	0		0
Loan, revolving converted to term loans	0		0
Loans	226		248
Charge-offs	0	$ 0
Loan, prior			3
Consumer Portfolio Segment [Member] \| Pass [Member]
Loan, current	11		122
Loan, one year before	100		95
Loan, two years before	87		28
Loan, three years before	25
Loan, prior	3
Loan, revolving	0		0
Loan, revolving converted to term loans	0		0
Loans	226		248
Loan, prior			3
Consumer Portfolio Segment [Member] \| Special Mention [Member]
Loan, current	0		0
Loan, one year before	0		0
Loan, two years before	0		0
Loan, three years before	0
Loan, prior	0
Loan, revolving	0		0
Loan, revolving converted to term loans	0		0
Loans	0		0
Loan, prior			0
Consumer Portfolio Segment [Member] \| Substandard [Member]
Loan, current	0		0
Loan, one year before	0		0
Loan, two years before	0		0
Loan, three years before	0
Loan, prior	0
Loan, revolving	0		0
Loan, revolving converted to term loans	0		0
Loans	$ 0		0
Loan, prior			$ 0