XML 45 R36.htm IDEA: XBRL DOCUMENT
v3.21.4

Loans and allowance for loan losses - Loan balances based on risk rating (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | $ 96,182 | $ 98,659
Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 95,668 | 97,863
Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 409 | 516
Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 105 | 280
First mortgage loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 95,858 | 98,274
First mortgage loans | 1-4 family residential |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 87,184 | 87,197
First mortgage loans | 1-4 family residential | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 86,670 | 86,500
First mortgage loans | 1-4 family residential | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 409 | 417
First mortgage loans | 1-4 family residential | Substandard |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 105 | 280
First mortgage loans | Multi-family |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 4,221 | 5,737
First mortgage loans | Multi-family | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 4,221 | 5,737
First mortgage loans | Commercial |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 4,453 | 5,340
First mortgage loans | Commercial | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 4,453 | 5,340
Consumer loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 324 | 385
Consumer loans | Pass |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | $ 324 | 286
Consumer loans | Special Mention |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total |  | $ 99

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, before allowance and fees, of loans and leases receivable. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=124259787&loc=d3e4428-111522 + Details
Name: | us-gaap_LoansAndLeasesReceivableBeforeFeesGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_PassMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_SpecialMentionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InternalCreditAssessmentAxis=us-gaap_SubstandardMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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

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

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