XML 61 R52.htm IDEA: XBRL DOCUMENT
v3.22.2

Note 10 - Commitments and Contingencies (Details Textual) | Jun. 30, 2022
--- | ---
First Mortgage Loans [Member] | One To Four Family Residential [Member] |
Financing Receivable, Minimum Percentage of Loan-to-value Ratio, Requires Mortgage Insurance | 80.00%

X
- Definition The minimum percentage of loan-to-value ratio that requires mortgage insurance on financing receivable. + References No definition available. + Details
Name: | nsts_FinancingReceivableMinimumPercentageOfLoantovalueRatioRequiresMortgageInsurance
Namespace Prefix: | nsts_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=nsts_FirstMortgageLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=nsts_OneToFourFamilyResidentialMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |