Equity Components [Axis] Common Stock [Member] Investment, Name [Axis] Golden Growers Cooperative [Member] Cargill [Member] Fair Value Hierarchy and NAV [Axis] Fair Value, Inputs, Level 2 [Member] Investment Type [Axis] Corporate Bond Securities [Member] Fixed Income Funds [Member] Money Market Funds [Member] Contract with Customer, Sales Channel [Axis] Method A Method B Cover [Abstract] Document Type Amendment Flag Amendment Description Document Registration Statement Document Annual Report Document Quarterly Report Document Transition Report Document Shell Company Report Document Shell Company Event Date Document Period Start Date Document Period End Date Document Fiscal Period Focus Document Fiscal Year Focus Current Fiscal Year End Date Entity File Number Entity Registrant Name Entity Central Index Key Entity Primary SIC Number Entity Tax Identification Number Entity Incorporation, State or Country Code Entity Address, Address Line One Entity Address, Address Line Two Entity Address, Address Line Three Entity Address, City or Town Entity Address, State or Province Entity Address, Country Entity Address, Postal Zip Code Country Region City Area Code Local Phone Number Extension Written Communications Soliciting Material Pre-commencement Tender Offer Pre-commencement Issuer Tender Offer Title of 12(b) Security No Trading Symbol Flag Trading Symbol Security Exchange Name Title of 12(g) Security Security Reporting Obligation Annual Information Form Audited Annual Financial Statements Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Interactive Data Current Entity Filer Category Entity Small Business Entity Emerging Growth Company Elected Not To Use the Extended Transition Period Document Accounting Standard Other Reporting Standard Item Number Entity Shell Company Entity Public Float Entity Bankruptcy Proceedings, Reporting Current Entity Common Stock, Shares Outstanding Documents Incorporated by Reference [Text Block] Statement of Financial Position [Abstract] ASSETS Current assets:        Cash and cash equivalents        Short-term investments        Other current assets Total current assets Long-term investments Investment in ProGold LLC            Total assets LIABILITIES AND MEMBERS’ EQUITY Current Liabilities        Accrued liabilities Total current liabilities Commitments and contingencies (Note 9) Members' equity:        Members’ equity        Accumulated other comprehensive loss Total members’ equity Total liabilities and members’ equity Membership Units, Authorized Membership Units, Issued Membership Units, Outstanding Income Statement [Abstract] OPERATIONS Corn revenue Corn expense Net income from Pro Gold LLC General & administrative expenses Net income from operations Other income Net income Weighted average shares/units outstanding Earnings per share/membership unit Basic and fully diluted COMPREHENSIVE INCOME Net income Unrealized gain (loss) on investments, net Comprehensive income Statement [Table] Statement [Line Items] Beginning balance, value        Net income        Unrealized gain (loss) on investments        Distributions to members Ending balance, value Statement of Cash Flows [Abstract] Cash Flows from Operating Activities      Net Income      Net (Income) from Pro Gold LLC Changes in assets and liabilities        Other Current Assets        Accrued liabilities and payables Net Cash (Used in) Operating Activities Cash Flows from Investing Activities      (Purchase) Sale of investments      Proceeds from investments      Distribution received from ProGold LLC Net Cash Provided in Investing Activities Cash Flows from Financing Activities      Member distributions paid Net Cash (Used in) Financing Activities Decrease in Cash and Cash Equivalents Cash and Cash Equivalents, Beginning of Period Cash and Cash Equivalents, End of Period Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Unrealized (Loss) on Investments Pay vs Performance Disclosure [Table] Executive Category [Axis] Individual [Axis] Adjustment to Compensation [Axis] Measure [Axis] Pay vs Performance Disclosure, Table Company Selected Measure Name Named Executive Officers, Footnote Peer Group Issuers, Footnote Changed Peer Group, Footnote PEO Total Compensation Amount PEO Actually Paid Compensation Amount Adjustment To PEO Compensation, Footnote Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Compensation Actually Paid Amount Adjustment to Non-PEO NEO Compensation Footnote Equity Valuation Assumption Difference, Footnote Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Company Selected Measure Total Shareholder Return Vs Peer Group Compensation Actually Paid vs. Other Measure Tabular List, Table Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Net Income (Loss) Company Selected Measure Amount Other Performance Measure, Amount Adjustment to Compensation, Amount PEO Name Name Non-GAAP Measure Description Additional 402(v) Disclosure Pension Benefits Adjustments, Footnote Equity Awards Adjustments, Footnote Erroneously Awarded Compensation Recovery [Table] Restatement Determination Date [Axis] Restatement Determination Date Aggregate Erroneous Compensation Amount Erroneous Compensation Analysis Stock Price or TSR Estimation Method Outstanding Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Not Yet Determined Name Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery, Explanation of Impracticability Name Compensation Amount Restatement does not require Recovery Awards Close in Time to MNPI Disclosures [Table] Award Type [Axis] Award Timing MNPI Disclosure Award Timing Method Award Timing Predetermined Award Timing MNPI Considered Award Timing, How MNPI Considered MNPI Disclosure Timed for Compensation Value Awards Close in Time to MNPI Disclosures, Table Name Underlying Securities Exercise Price Fair Value as of Grant Date Underlying Security Market Price Change Trading Arrangements, by Individual [Table] Trading Arrangement [Axis] Material Terms of Trading Arrangement Name Title Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted Adoption Date Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated Termination Date Expiration Date Arrangement Duration Aggregate Available Insider Trading Policies and Procedures [Line Items] Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Not Adopted Organization, Consolidation and Presentation of Financial Statements [Abstract] BASIS OF PRESENTATION Other Income and Expenses [Abstract] EXPENSES Equity Method Investments and Joint Ventures [Abstract] PROGOLD LIMITED LIABILITY COMPANY Investments, Debt and Equity Securities [Abstract] INVESTMENTS Retirement Benefits [Abstract] EMPLOYEE BENEFIT PLANS Revenue from Contract with Customer [Abstract] REVENUE RECOGNITION Equity [Abstract] DISTRIBUTIONS TO MEMBERS Debt Disclosure [Abstract] LINE OF CREDIT Commitments and Contingencies Disclosure [Abstract] COMMITMENTS AND CONTINGENCIES Subsequent Events [Abstract] SUBSEQUENT EVENTS EquityMethodInvestmentsTextBlock Schedule of Fair Value of Investments Held to Maturity Based on Level 2 Inputs Schedule of Bond Maturities Schedule of Investments Held to Maturity Schedule of Unrealized Loss on Investments Annual Contractual Payments to Cargill to Arrange for Delivery of The Corn and Other Agency Services [custom:NumberOfInstallments] Equity Method Investment [Table] Schedule of Equity Method Investments [Line Items] Equity Method Investment,Ownership Percentage After Acquisition Current Assets Long-Term Assets Total Assets Current Liabilities Members’ Equity Total Liabilities and Members’ Equity Rent Revenue on Operating Lease Expenses Net Income Defined Benefit Plan [Table] Defined Benefit Plan Disclosure [Line Items] Schedule of Investments [Line Items] Fair Value Debt Securities, Held-to-Maturity, Amortized Cost, after Allowance for Credit Loss, Maturity [Abstract] Due in 1 year or less Due in 6 to 10 years Total Debt Securities, Held-to-Maturity, Fair Value, Maturity [Abstract] Due in 1 year or less Due in 6 to 10 years Total Financial Instruments Owned and Pledged as Collateral [Table] Financial Instruments Owned and Pledged as Collateral [Line Items] Amortized Cost Unrealized Losses Unrealized Gains Fair Value, Less than 12 Months Unrealized Loss, Less than 12 Months Fair Value,More than 12 Months Unrealized Loss, More than 12 Months Disaggregation of Revenue [Table] Disaggregation of Revenue [Line Items] Annual Cooperative Fee for Corn Delivery Incentive Payment Per Bushel To Members On Delivery Of Corn Under Method A Next Fiscal Year Agency Fee Per Bushel for Corn Delivered Using Method B Revenues Distributions to Members Distribution To Members Per Outstanding Membership Unit Line of Credit Facility, Maximum Borrowing Capacity Line of Credit Interest Rate Equals Prime Minus 0.50% Line of Credit Facility, Interest Rate During Period Long-Term Line of Credit Supply Commitment, Description Commitment by Cargil to pay Golden Growers Cooperative Represents annual contractual payments for the procurement of corn and other agency services. Represents fixed Incentive Payment Per Bushel besides market price On Delivery Of Corn Under Method A Represents the payment Per Bushel made by Cargill for corn delivered to the entity using Method B. Assets, Current Assets Liabilities, Current Members' Equity Liabilities and Equity Cost of Revenue General and Administrative Expense Operating Income (Loss) Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Comprehensive Income (Loss), Net of Tax, Attributable to Parent Partners' Capital, Including Portion Attributable to Noncontrolling Interest Partners' Capital Account, Distributions Increase (Decrease) in Other Current Assets Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Payments to Acquire Investments Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Distribution Made to Limited Partner, Cash Distributions Paid Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Including Discontinued Operation Forgone Recovery, Individual Name Outstanding Recovery, Individual Name Awards Close in Time to MNPI Disclosures, Individual Name Trading Arrangement, Individual Name Current Liabilities [Default Label] Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, Year One Debt Securities, Held-to-Maturity, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10 Debt Securities, Held-to-Maturity, Maturity, Allocated and Single Maturity Date, Fair Value Debt Securities, Available-for-Sale and Held-to-Maturity, Cumulative Unrecognized Loss Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer