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

Note 14 - Fair Value of Financial Instruments - Carrying Amounts and Estimated Fair Value Hierarchy of Certain Financial Information (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Reported Value Measurement [Member]
Loans, net	$ 96,534	$ 98,455
Loans held for sale	104	1,972
Interest-bearing deposits	186,531	176,670
Estimate of Fair Value Measurement [Member]
Loans, net	96,391	102,034
Loans held for sale	112	1,972
Interest-bearing deposits	181,564	177,280
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	96,391	102,034
Loans held for sale	112	1,972
Interest-bearing deposits	181,564	177,280
Estimate of Fair Value Measurement [Member] \| Fair Value, Inputs, Level 3 [Member]
Loans, net	0	0
Loans held for sale	0	0
Interest-bearing deposits	$ 0	$ 0