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

Note 8 - Fair Value of Financial Instruments - Carrying Amounts and Estimated Fair Value Hierarchy of Certain Financial Information (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Reported Value Measurement [Member]
Loans, net	$ 97,345	$ 96,534
Loans held for sale	175	104
Interest-bearing deposits	174,958	186,531
Estimate of Fair Value Measurement [Member]
Loans, net	92,803	96,391
Loans held for sale	180	112
Interest-bearing deposits	162,982	181,564
Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 1 [Member]
Loans, net	0	0
Loans held for sale	0	0
Interest-bearing deposits	0	0
Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 2 [Member]
Loans, net	92,018	95,612
Loans held for sale	180	112
Interest-bearing deposits	162,982	181,564
Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 3 [Member]
Loans, net	785	779
Loans held for sale	0	0
Interest-bearing deposits	$ 0	$ 0