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

Note 14 - Fair Value Measurements - Fair Value On Recurring Basis (Details)

Note 14 - Fair Value Measurements - Fair Value On Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Securities available for sale	$ 121,205	$ 100,950
U.S. Treasury Notes [Member]
Securities available for sale	7,288
US Government Agencies Debt Securities [Member]
Securities available for sale	21,390	10,053
Municipal Bonds [Member]
Securities available for sale	19,637	18,000
Residential Mortgage-Backed Securities [Member]
Securities available for sale	35,738	42,148
Fair Value, Recurring [Member]
Securities available for sale	121,205	100,950
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 1 [Member]
Securities available for sale	7,288	0
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member]
Securities available for sale	113,917	100,950
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 3 [Member]
Securities available for sale	0	0
Fair Value, Recurring [Member] \| U.S. Treasury Notes [Member]
Securities available for sale	7,288
Fair Value, Recurring [Member] \| U.S. Treasury Notes [Member] \| Fair Value, Inputs, Level 1 [Member]
Securities available for sale	7,288
Fair Value, Recurring [Member] \| U.S. Treasury Notes [Member] \| Fair Value, Inputs, Level 2 [Member]
Securities available for sale	0
Fair Value, Recurring [Member] \| U.S. Treasury Notes [Member] \| Fair Value, Inputs, Level 3 [Member]
Securities available for sale	0
Fair Value, Recurring [Member] \| US Government Agencies Debt Securities [Member]
Securities available for sale	21,390	10,053
Fair Value, Recurring [Member] \| US Government Agencies Debt Securities [Member] \| Fair Value, Inputs, Level 1 [Member]
Securities available for sale	0	0
Fair Value, Recurring [Member] \| US Government Agencies Debt Securities [Member] \| Fair Value, Inputs, Level 2 [Member]
Securities available for sale	21,390	10,053
Fair Value, Recurring [Member] \| US Government Agencies Debt Securities [Member] \| Fair Value, Inputs, Level 3 [Member]
Securities available for sale	0	0
Fair Value, Recurring [Member] \| Municipal Bonds [Member]
Securities available for sale	19,637	18,000
Fair Value, Recurring [Member] \| Municipal Bonds [Member] \| Fair Value, Inputs, Level 1 [Member]
Securities available for sale	0	0
Fair Value, Recurring [Member] \| Municipal Bonds [Member] \| Fair Value, Inputs, Level 2 [Member]
Securities available for sale	19,637	18,000
Fair Value, Recurring [Member] \| Municipal Bonds [Member] \| Fair Value, Inputs, Level 3 [Member]
Securities available for sale	0	0
Fair Value, Recurring [Member] \| Residential Mortgage-Backed Securities [Member]
Securities available for sale	35,738	42,148
Fair Value, Recurring [Member] \| Residential Mortgage-Backed Securities [Member] \| Fair Value, Inputs, Level 1 [Member]
Securities available for sale	0	0
Fair Value, Recurring [Member] \| Residential Mortgage-Backed Securities [Member] \| Fair Value, Inputs, Level 2 [Member]
Securities available for sale	35,738	42,148
Fair Value, Recurring [Member] \| Residential Mortgage-Backed Securities [Member] \| Fair Value, Inputs, Level 3 [Member]
Securities available for sale	0	0
Fair Value, Recurring [Member] \| Collateralized Mortgage Obligations [Member]
Securities available for sale	37,152	30,749
Fair Value, Recurring [Member] \| Collateralized Mortgage Obligations [Member] \| Fair Value, Inputs, Level 1 [Member]
Securities available for sale	0	0
Fair Value, Recurring [Member] \| Collateralized Mortgage Obligations [Member] \| Fair Value, Inputs, Level 2 [Member]
Securities available for sale	37,152	30,749
Fair Value, Recurring [Member] \| Collateralized Mortgage Obligations [Member] \| Fair Value, Inputs, Level 3 [Member]
Securities available for sale	$ 0	$ 0