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

Note 13 - Fair Value Measurements - Fair Value On Recurring Basis (Details)

Note 13 - Fair Value Measurements - Fair Value On Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Securities available for sale	$ 100,950	$ 81,620
US Government Agencies Debt Securities [Member]
Securities available for sale	10,053	7,147
Municipal Bonds [Member]
Securities available for sale	18,000	10,980
Residential Mortgage Backed Securities [Member]
Securities available for sale	42,148	43,094
Fair Value, Recurring [Member]
Securities available for sale	100,950	81,620
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 1 [Member]
Securities available for sale	0	0
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member]
Securities available for sale	100,950	81,620
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 3 [Member]
Securities available for sale	0	0
Fair Value, Recurring [Member] \| US Government Agencies Debt Securities [Member]
Securities available for sale	10,053	7,147
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	10,053	7,147
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	18,000	10,980
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	18,000	10,980
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	42,148	43,094
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	42,148	43,094
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	30,749	20,399
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	30,749	20,399
Fair Value, Recurring [Member] \| Collateralized Mortgage Obligations [Member] \| Fair Value, Inputs, Level 3 [Member]
Securities available for sale	$ 0	$ 0