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

Note 11 - Benefit Plans (Details Textual) - Benefit Plan 401 K [Member] - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay	6.00%
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 161,000	$ 150,000
Defined Benefit Plan, Plan Assets, Contributions by Employer	$ 0	$ 0