Liabilities / Assets
73rd percentile
Higher debt load relative to assets than 73% of similar nonprofits.
Mockingbird Flying Club
EIN 35-2335593 • 501(c)7 • Sioux Falls, SD
Profile
The primary exempt purpose is to provide opportunities for members to come together and learn as well as socialize about their common interest in general aviation and to make affordable flying available to membership.
Siviq Scores
Precomputed percentiles relative to similar nonprofits. These scores are descriptive rather than judgmental.
0.24x
Liabilities / Revenue
88th percentile
Higher debt load relative to revenue than 88% of similar nonprofits.
Net Margin
45th percentile
Higher net margin than 45% of similar nonprofits.
Top Officer Pay
89th percentile
Higher top officer pay than 89% of similar nonprofits.
Top officer pay equals 0.0% of source-year revenue.
Asset Growth
41st percentile
Faster asset growth than 41% of similar nonprofits.
Revenue Growth
62nd percentile
Faster revenue growth than 62% of similar nonprofits.
Balance Sheet
Assets
Up$567,708
Up $2,090 (+0.4%) from 2024
Liabilities
Down$135,652
Down $36,938 (-21%) from 2024
Net Assets
Up$432,056
Up $39,028 (+9.9%) from 2024
Revenue
Up$148,334
Up $13,146 (+9.7%) from 2024
Expenses
Up$143,716
Up $5,311 (+3.8%) from 2024
Net Income
Up$4,618
Up $7,835 (+244%) from 2024
Trend Graphs
Filings
Most recent year
2025 • Form 990Detailed filing. Detailed filing data is available for this year.
- Assets
- $567,708
- Liabilities
- $135,652
- Net assets
- $432,056
- Revenue
- $148,334
- Expenses
- $143,716
- Net income
- $4,618
Latest Filing Detail
Jump To
Filing Snapshot
- Filing Period
- Jan 1, 2025 to Dec 31, 2025
- Signed
- Feb 19, 2026
- Return Version
- 2025v4.0
- Gross Receipts
- $150,058
Mission and Program Overview
Mission
The primary exempt purpose is to provide opportunities for members to come together and learn as well as socialize about their common interest in general aviation and to make affordable flying available to membership.
The primary purpose is to provide opportunities for members to come together and learn as well as socialize about their common interest in general aviation and to make affordable flying available to the membership.
Balance Sheet Detail
| Line | Beginning | End | Change |
|---|---|---|---|
| Assets | |||
| Land, Buildings, and Equipment, Net | $505,508 | $515,647 | ▲ $10,139 |
| Savings and Temporary Cash Investments | $50,824 | $48,674 | ▼ $2,150 |
| Prepaid Expenses and Deferred Charges | $9,286 | $3,387 | ▼ $5,899 |
| Cash and Non-Interest-Bearing Accounts | - | $0 | - |
| Accounts Receivable | - | $0 | - |
| Other Notes and Loans Receivable, Net | - | $0 | - |
| Pledges and Grants Receivable | - | $0 | - |
| Receivable From Disqualified Prsn | - | $0 | - |
| Receivables From Officers Etc | - | $0 | - |
| Investments Other Securities | - | $0 | - |
| Investments Program Related | - | $0 | - |
| Investments in Publicly Traded Securities | - | $0 | - |
| Intangible Assets | - | $0 | - |
| Inventories for Sale or Use | - | $0 | - |
| Total Assets | $565,618 | $567,708 | ▲ $2,090 |
| Other Assets Total | - | $0 | - |
| Liabilities | |||
| Mortgage Notes Payable Secured by Investment Property | $171,785 | $135,254 | ▼ $36,531 |
| Accounts Payable and Accrued Expenses | $805 | $397 | ▼ $408 |
| Other Liabilities | - | $1 | - |
| Total Liabilities | $172,590 | $135,652 | ▼ $36,938 |
| Net Assets / Fund Balance | |||
| Net Assets Without Donor Restrictions | $393,028 | $432,056 | ▲ $39,028 |
| Total Net Assets Fund Balance | $393,028 | $432,056 | ▲ $39,028 |
| Total Liabilities and Net Assets / Fund Balance | $565,618 | $567,708 | ▲ $2,090 |
Asset Categories
| Asset | Book Value | Depreciation | Basis |
|---|---|---|---|
| Equipment | $515,647 | - | $515,647 |
Compensation and Service Providers
Board Members and Trustees
| Name | Title |
|---|---|
| Kurt Johnson | President |
| Daniel Koester | Vice President |
| Jeremy Langrock | Director |
| Jim Juhl | Director |
| Troy Huls | Director |
| Benjamin Tracy | Secretary |
| Ty Stender | Treasurer |
Revenue and Support
Revenue Composition
- Contributions and Grants
- $0
- Program Service Revenue
- $148,705
- Investment Income
- $1,353
- Other Revenue
- $-1,724
- Change in Net Assets
- $4,618
Expenses and Functional Allocation
Major Expense Lines
| Line Item | Amount |
|---|---|
| Other Expenses | $143,716 |
| Grants and Similar Amounts Paid | $0 |
| Professional Fundraising Fees | $0 |
| Salaries, Compensation, and Employee Benefits | $0 |
| Total Fundraising Expense | $0 |
Functional Expense Allocation
| Line Item | Program | Management | Fundraising | Total |
|---|---|---|---|---|
| All Other Expenses | $24,898 | - | - | $24,898 |
| Other Expenses | $13,469 | - | - | $13,469 |
| Occupancy | $9,916 | - | - | $9,916 |
| Fees for Services Accounting | $5,341 | - | - | $5,341 |
| Total Functional Expenses | $143,716 | $0 | $0 | $143,716 |
Fundraising, Events, and Gaming
- Fundraising activities
- No
- Gaming activities
- No
- Professional fundraiser used
- No
Fundraising and Gaming Totals
| Line Item | Amount |
|---|---|
| Professional Fundraising Fees | $0 |
Political and Lobbying Activity
- Political campaign activity
- No
- Subject to proxy tax
- No
Insider Transactions and Loans
Loans and Receivables
| Line Item | Beginning | End | Change |
|---|---|---|---|
| Receivables from Disqualified Persons | - | $0 | - |
| Receivables from Officers, Directors, Trustees, and Key Employees | - | $0 | - |
Debt and Bond Financing
Other Reported Liabilities
| Liability | Amount |
|---|---|
| Rounding | $1 |
Governance and Compliance
Governance Checklist
- Compiled or reviewed by an accountant
- No
- Backup withholding compliance
- No
- Business relationship with 35% controlled entity
- No
- Business relationship with family members
- No
- Business relationship with organization members
- No
- Material changes to governing documents
- No
- Compensation from other sources disclosed
- No
- CEO compensation reviewed
- No
- Other officer compensation reviewed
- No
- Conflict-of-interest policy
- No
- Audited financial statements prepared
- No
- Key decisions subject to board approval
- No
- Management duties delegated
- No
Governance Explanations
Form 990, Part VI, Section B, Line 11B
“No review was or will be conducted.”
Form 990, Part VI, Section C, Line 19
“No documents available to the public.”
Filing and Contact Details
Filer
- Filer Name
- Mockingbird Flying Club
- EIN
- 35-2335593
- Phone
- 6053709097
- Address
- PO Box 91332, Sioux Falls, SD 57109
Signing Officer
- Name
- Kurt Johnson
- Title
- President
- Signed
- 2026-02-19
- Discuss with paid preparer
- Yes
Organization Details
- Principal Officer
- Kurt Johnson
- Voting Board Members
- 7
- Independent Board Members
- 0
- Employees
- 0
Preparer
- Firm
- Limestone Inc
- Address
- 5015 S CROSSING PL STE 110, SIOUX FALLS, SD 57108
- Preparer
- Steven Mix
- Phone
- 6056104958
Supplemental Narrative
Additional Explanations
Form 990, Part IX, Line 24E
“Aircraft Annual Inspection: Column (A) - Total = $5190; Column (B) - Program Services = $5190; Column (C) - Management & General = $0; Column (D) - Fundraising = $0”
Form 990, Part IX, Line 24E
“Aircraft Fuel: Column (A) - Total = $675; Column (B) - Program Services = $675; Column (C) - Management & General = $0; Column (D) - Fundraising = $0”
Form 990, Part IX, Line 24E
“Aircraft GPS Subscriptions: Column (A) - Total = $1664; Column (B) - Program Services = $1664; Column (C) - Management & General = $0; Column (D) - Fundraising = $0”
Form 990, Part IX, Line 24E
“Fly Credits: Column (A) - Total = $9240; Column (B) - Program Services = $9240; Column (C) - Management & General = $0; Column (D) - Fundraising = $0”
Form 990, Part IX, Line 24E
“Janitorial Supplies: Column (A) - Total = $969; Column (B) - Program Services = $969; Column (C) - Management & General = $0; Column (D) - Fundraising = $0”
Form 990, Part IX, Line 24E
“Meeting Expenses: Column (A) - Total = $2263; Column (B) - Program Services = $2263; Column (C) - Management & General = $0; Column (D) - Fundraising = $0”
Form 990, Part IX, Line 24E
“Merchant & Transactions Fees: Column (A) - Total = $4; Column (B) - Program Services = $4; Column (C) - Management & General = $0; Column (D) - Fundraising = $0”
Form 990, Part IX, Line 24E
“Miscellanoues Expenses: Column (A) - Total = $0; Column (B) - Program Services = $0; Column (C) - Management & General = $0; Column (D) - Fundraising = $0”
Form 990, Part IX, Line 24E
“Office Expenses: Column (A) - Total = $373; Column (B) - Program Services = $373; Column (C) - Management & General = $0; Column (D) - Fundraising = $0”
Form 990, Part IX, Line 24E
“Oil: Column (A) - Total = $213; Column (B) - Program Services = $213; Column (C) - Management & General = $0; Column (D) - Fundraising = $0”
Form 990, Part IX, Line 24E
“Postage and Freight: Column (A) - Total = $374; Column (B) - Program Services = $374; Column (C) - Management & General = $0; Column (D) - Fundraising = $0”
Form 990, Part IX, Line 24E
“Quick books: Column (A) - Total = $1806; Column (B) - Program Services = $1806; Column (C) - Management & General = $0; Column (D) - Fundraising = $0”
Form 990, Part IX, Line 24E
“Registration & Filing Fees: Column (A) - Total = $100; Column (B) - Program Services = $100; Column (C) - Management & General = $0; Column (D) - Fundraising = $0”
Form 990, Part IX, Line 24E
“Use Tax: Column (A) - Total = $649; Column (B) - Program Services = $649; Column (C) - Management & General = $0; Column (D) - Fundraising = $0”
Form 990, Part IX, Line 24E
“Website Fees: Column (A) - Total = $1378; Column (B) - Program Services = $1378; Column (C) - Management & General = $0; Column (D) - Fundraising = $0”
Form 990, Part XI, Line 9
“Avionics Fund = $4680”
Form 990, Part XI, Line 9
“Birdie Party Fund = $1653”
Form 990, Part XI, Line 9
“Paid In Capital = $28077”
Raw XML Appendix377 raw XML fields
This appendix keeps the raw XML leaves available for debugging and edge-case review. The human report above is the primary experience.
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| IRS990/CYRevenuesLessExpensesAmt | 0 | 4618 |
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| IRS990/DescribedInSection501c3Ind | 0 | false |
| IRS990/DisregardedEntityInd | 0 | false |
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| IRS990/ForeignFinancialAccountInd | 0 | false |
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| IRS990/ForeignOfficeInd | 0 | false |
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| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 1 | X |
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| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 2 | 0 |
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| IRS990/Organization501cInd | 0 | X |
| IRS990/OrganizationFollowsFASB117Ind | 0 | X |
| IRS990/OtherAssetsTotalGrp/EOYAmt | 0 | 0 |
| IRS990/OtherChangesInNetAssetsAmt | 0 | 34410 |
| IRS990/OtherEmployeeBenefitsGrp/TotalAmt | 0 | 0 |
| IRS990/OtherExpensesGrp/Desc | 0 | Aircraft Maintenance |
| IRS990/OtherExpensesGrp/Desc | 1 | Aircraft Insurance |
| IRS990/OtherExpensesGrp/Desc | 2 | Aircraft Engine Repairs |
| IRS990/OtherExpensesGrp/Desc | 3 | Interest Expense |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 0 | 38774 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 1 | 29229 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 2 | 22089 |
| IRS990/OtherExpensesGrp/ProgramServicesAmt | 3 | 13469 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 38774 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 29229 |
| IRS990/OtherExpensesGrp/TotalAmt | 2 | 22089 |
| IRS990/OtherExpensesGrp/TotalAmt | 3 | 13469 |
| IRS990/OtherLiabilitiesGrp/EOYAmt | 0 | 1 |
| IRS990/OtherRevenueTotalAmt | 0 | 0 |
| IRS990/OtherSalariesAndWagesGrp/TotalAmt | 0 | 0 |
| IRS990/OthNotesLoansReceivableNetGrp/EOYAmt | 0 | 0 |
| IRS990/PartialLiquidationInd | 0 | false |
| IRS990/PaymentsToAffiliatesGrp/TotalAmt | 0 | 0 |
| IRS990/PayrollTaxesGrp/TotalAmt | 0 | 0 |
| IRS990/PensionPlanContributionsGrp/TotalAmt | 0 | 0 |
| IRS990/PledgesAndGrantsReceivableGrp/EOYAmt | 0 | 0 |
| IRS990/PoliticalCampaignActyInd | 0 | false |
| IRS990/PrepaidExpensesDefrdChargesGrp/BOYAmt | 0 | 9286 |
| IRS990/PrepaidExpensesDefrdChargesGrp/EOYAmt | 0 | 3387 |
| IRS990/PrincipalOfficerNm | 0 | Kurt Johnson |
| IRS990/ProfessionalFundraisingInd | 0 | false |
| IRS990/ProgramServiceRevenueGrp/BusinessCd | 0 | 480000 |
| IRS990/ProgramServiceRevenueGrp/Desc | 0 | Aircraft Rental |
| IRS990/ProgramServiceRevenueGrp/RelatedOrExemptFuncIncomeAmt | 0 | 148705 |
| IRS990/ProgramServiceRevenueGrp/TotalRevenueColumnAmt | 0 | 148705 |
| IRS990/ProhibitedTaxShelterTransInd | 0 | false |
| IRS990/PYInvestmentIncomeAmt | 0 | 865 |
| IRS990/PymtTravelEntrtnmntPubOfclGrp/TotalAmt | 0 | 0 |
| IRS990/PYOtherExpensesAmt | 0 | 138405 |
| IRS990/PYProgramServiceRevenueAmt | 0 | 134323 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | -3217 |
| IRS990/PYTotalExpensesAmt | 0 | 138405 |
| IRS990/PYTotalRevenueAmt | 0 | 135188 |
| IRS990/RcvblFromDisqualifiedPrsnGrp/EOYAmt | 0 | 0 |
| IRS990/ReceivablesFromOfficersEtcGrp/EOYAmt | 0 | 0 |
| IRS990/ReconcilationRevenueExpnssAmt | 0 | 4618 |
| IRS990/RelatedEntityInd | 0 | false |
| IRS990/RelatedOrganizationCtrlEntInd | 0 | false |
| IRS990/ReportInvestmentsOtherSecInd | 0 | false |
| IRS990/ReportLandBuildingEquipmentInd | 0 | true |
| IRS990/ReportOtherAssetsInd | 0 | false |
| IRS990/ReportOtherLiabilitiesInd | 0 | true |
| IRS990/ReportProgramRelatedInvstInd | 0 | false |
| IRS990/RevenueAmt | 0 | 150058 |
| IRS990/RoyaltiesGrp/TotalAmt | 0 | 0 |
| IRS990/RoyaltiesRevenueGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/SavingsAndTempCashInvstGrp/BOYAmt | 0 | 50824 |
| IRS990/SavingsAndTempCashInvstGrp/EOYAmt | 0 | 48674 |
| IRS990/ScheduleBRequiredInd | 0 | false |
| IRS990ScheduleD/EquipmentGrp/BookValueAmt | 0 | 515647 |
| IRS990ScheduleD/EquipmentGrp/OtherCostOrOtherBasisAmt | 0 | 515647 |
| IRS990ScheduleD/OtherLiabilitiesOrgGrp/Amt | 0 | 1 |
| IRS990ScheduleD/OtherLiabilitiesOrgGrp/Desc | 0 | Rounding |
| IRS990ScheduleD/TotalBookValueLandBuildingsAmt | 0 | 515647 |
| IRS990ScheduleD/TotalLiabilityAmt | 0 | 1 |
| IRS990/ScheduleJRequiredInd | 0 | false |
| IRS990/ScheduleORequiredInd | 0 | true |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 0 | No review was or will be conducted. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 1 | No documents available to the public. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 2 | Aircraft Annual Inspection: Column (A) - Total = $5190; Column (B) - Program Services = $5190; Column (C) - Management & General = $0; Column (D) - Fundraising = $0 |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 3 | Aircraft Fuel: Column (A) - Total = $675; Column (B) - Program Services = $675; Column (C) - Management & General = $0; Column (D) - Fundraising = $0 |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 4 | Aircraft GPS Subscriptions: Column (A) - Total = $1664; Column (B) - Program Services = $1664; Column (C) - Management & General = $0; Column (D) - Fundraising = $0 |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 5 | Fly Credits: Column (A) - Total = $9240; Column (B) - Program Services = $9240; Column (C) - Management & General = $0; Column (D) - Fundraising = $0 |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 6 | Janitorial Supplies: Column (A) - Total = $969; Column (B) - Program Services = $969; Column (C) - Management & General = $0; Column (D) - Fundraising = $0 |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 7 | Meeting Expenses: Column (A) - Total = $2263; Column (B) - Program Services = $2263; Column (C) - Management & General = $0; Column (D) - Fundraising = $0 |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 8 | Merchant & Transactions Fees: Column (A) - Total = $4; Column (B) - Program Services = $4; Column (C) - Management & General = $0; Column (D) - Fundraising = $0 |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 9 | Miscellanoues Expenses: Column (A) - Total = $0; Column (B) - Program Services = $0; Column (C) - Management & General = $0; Column (D) - Fundraising = $0 |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 10 | Office Expenses: Column (A) - Total = $373; Column (B) - Program Services = $373; Column (C) - Management & General = $0; Column (D) - Fundraising = $0 |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 11 | Oil: Column (A) - Total = $213; Column (B) - Program Services = $213; Column (C) - Management & General = $0; Column (D) - Fundraising = $0 |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 12 | Postage and Freight: Column (A) - Total = $374; Column (B) - Program Services = $374; Column (C) - Management & General = $0; Column (D) - Fundraising = $0 |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 13 | Quick books: Column (A) - Total = $1806; Column (B) - Program Services = $1806; Column (C) - Management & General = $0; Column (D) - Fundraising = $0 |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 14 | Registration & Filing Fees: Column (A) - Total = $100; Column (B) - Program Services = $100; Column (C) - Management & General = $0; Column (D) - Fundraising = $0 |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 15 | Use Tax: Column (A) - Total = $649; Column (B) - Program Services = $649; Column (C) - Management & General = $0; Column (D) - Fundraising = $0 |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 16 | Website Fees: Column (A) - Total = $1378; Column (B) - Program Services = $1378; Column (C) - Management & General = $0; Column (D) - Fundraising = $0 |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 17 | Avionics Fund = $4680 |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 18 | Birdie Party Fund = $1653 |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 19 | Paid In Capital = $28077 |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | Form 990, Part VI, Section B, Line 11b |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | Form 990, Part VI, Section C, Line 19 |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 2 | Form 990, Part IX, Line 24e |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 3 | Form 990, Part IX, Line 24e |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 4 | Form 990, Part IX, Line 24e |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 5 | Form 990, Part IX, Line 24e |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 6 | Form 990, Part IX, Line 24e |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 7 | Form 990, Part IX, Line 24e |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 8 | Form 990, Part IX, Line 24e |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 9 | Form 990, Part IX, Line 24e |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 10 | Form 990, Part IX, Line 24e |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 11 | Form 990, Part IX, Line 24e |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 12 | Form 990, Part IX, Line 24e |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 13 | Form 990, Part IX, Line 24e |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 14 | Form 990, Part IX, Line 24e |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 15 | Form 990, Part IX, Line 24e |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 16 | Form 990, Part IX, Line 24e |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 17 | Form 990, Part XI, Line 9 |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 18 | Form 990, Part XI, Line 9 |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 19 | Form 990, Part XI, Line 9 |
| IRS990/SchoolOperatingInd | 0 | false |
| IRS990/SignificantChangeInd | 0 | false |
| IRS990/SignificantNewProgramSrvcInd | 0 | false |
| IRS990/SubjectToExcsTaxNetInvstIncInd | 0 | false |
| IRS990/SubjectToProxyTaxInd | 0 | false |
| IRS990/SubjToTaxRmnrtnExPrchtPymtInd | 0 | false |
| IRS990/TaxablePartyNotificationInd | 0 | false |
| IRS990/TaxExemptBondsInd | 0 | false |
| IRS990/TerminateOperationsInd | 0 | false |
| IRS990/TotalAssetsBOYAmt | 0 | 565618 |
| IRS990/TotalAssetsEOYAmt | 0 | 567708 |
| IRS990/TotalAssetsGrp/BOYAmt | 0 | 565618 |
| IRS990/TotalAssetsGrp/EOYAmt | 0 | 567708 |
| IRS990/TotalCompGreaterThan150KInd | 0 | false |
| IRS990/TotalContributionsAmt | 0 | 0 |
| IRS990/TotalEmployeeCnt | 0 | 0 |
| IRS990/TotalFunctionalExpensesGrp/FundraisingAmt | 0 | 0 |
| IRS990/TotalFunctionalExpensesGrp/ManagementAndGeneralAmt | 0 | 0 |
| IRS990/TotalFunctionalExpensesGrp/ProgramServicesAmt | 0 | 143716 |
| IRS990/TotalFunctionalExpensesGrp/TotalAmt | 0 | 143716 |
| IRS990/TotalGrossUBIAmt | 0 | 0 |
| IRS990/TotalLiabilitiesBOYAmt | 0 | 172590 |
| IRS990/TotalLiabilitiesEOYAmt | 0 | 135652 |
| IRS990/TotalLiabilitiesGrp/BOYAmt | 0 | 172590 |
| IRS990/TotalLiabilitiesGrp/EOYAmt | 0 | 135652 |
| IRS990/TotalNetAssetsFundBalanceGrp/BOYAmt | 0 | 393028 |
| IRS990/TotalNetAssetsFundBalanceGrp/EOYAmt | 0 | 432056 |
| IRS990/TotalProgramServiceExpensesAmt | 0 | 145438 |
| IRS990/TotalProgramServiceRevenueAmt | 0 | 148705 |
| IRS990/TotalRevenueGrp/RelatedOrExemptFuncIncomeAmt | 0 | 148334 |
| IRS990/TotalRevenueGrp/TotalRevenueColumnAmt | 0 | 148334 |
| IRS990/TotLiabNetAssetsFundBalanceGrp/BOYAmt | 0 | 565618 |
| IRS990/TotLiabNetAssetsFundBalanceGrp/EOYAmt | 0 | 567708 |
| IRS990/TravelGrp/TotalAmt | 0 | 0 |
| IRS990/UnrelatedBusIncmOverLimitInd | 0 | false |
| IRS990/USAddress/AddressLine1Txt | 0 | PO Box 91332 |
| IRS990/USAddress/CityNm | 0 | Sioux Falls |
| IRS990/USAddress/StateAbbreviationCd | 0 | SD |
| IRS990/USAddress/ZIPCd | 0 | 57109 |
| IRS990/VotingMembersGoverningBodyCnt | 0 | 7 |
| IRS990/VotingMembersIndependentCnt | 0 | 0 |
| IRS990/WebsiteAddressTxt | 0 | N/A |
| IRS990/WhistleblowerPolicyInd | 0 | false |
| ReturnHeader/BuildTS | 0 | 2025-03-06 01:10:19Z |
| ReturnHeader/BusinessOfficerGrp/DiscussWithPaidPreparerInd | 0 | true |
| ReturnHeader/BusinessOfficerGrp/PersonNm | 0 | Kurt Johnson |
| ReturnHeader/BusinessOfficerGrp/PersonTitleTxt | 0 | President |
| ReturnHeader/BusinessOfficerGrp/SignatureDt | 0 | 2026-02-19 |
| ReturnHeader/Filer/BusinessName/BusinessNameLine1Txt | 0 | Mockingbird Flying Club |
| ReturnHeader/Filer/BusinessNameControlTxt | 0 | MOCK |
| ReturnHeader/Filer/EIN | 0 | 352335593 |
| ReturnHeader/Filer/PhoneNum | 0 | 6053709097 |
| ReturnHeader/Filer/USAddress/AddressLine1Txt | 0 | PO Box 91332 |
| ReturnHeader/Filer/USAddress/CityNm | 0 | Sioux Falls |
| ReturnHeader/Filer/USAddress/StateAbbreviationCd | 0 | SD |
| ReturnHeader/Filer/USAddress/ZIPCd | 0 | 57109 |
| ReturnHeader/PreparerFirmGrp/PreparerFirmEIN | 0 | 260780196 |
| ReturnHeader/PreparerFirmGrp/PreparerFirmName/BusinessNameLine1Txt | 0 | Limestone Inc |
| ReturnHeader/PreparerFirmGrp/PreparerUSAddress/AddressLine1Txt | 0 | 5015 S CROSSING PL STE 110 |
| ReturnHeader/PreparerFirmGrp/PreparerUSAddress/CityNm | 0 | SIOUX FALLS |
| ReturnHeader/PreparerFirmGrp/PreparerUSAddress/StateAbbreviationCd | 0 | SD |
| ReturnHeader/PreparerFirmGrp/PreparerUSAddress/ZIPCd | 0 | 57108 |
| ReturnHeader/PreparerPersonGrp/PhoneNum | 0 | 6056104958 |
| ReturnHeader/PreparerPersonGrp/PreparerPersonNm | 0 | Steven Mix |
| ReturnHeader/ReturnTs | 0 | 2026-02-19T13:04:42-08:00 |
| ReturnHeader/ReturnTypeCd | 0 | 990 |
| ReturnHeader/TaxPeriodBeginDt | 0 | 2025-01-01 |
| ReturnHeader/TaxPeriodEndDt | 0 | 2025-12-31 |
| ReturnHeader/TaxYr | 0 | 2025 |
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