XML 49 R33.htm IDEA: XBRL DOCUMENT
v3.21.1

Note 3 - Statements of Net Assets (Details Textual) | 12 Months Ended | 24 Months Ended |
--- | --- | --- | ---
Dec. 31, 2020 USD ($) ft² $ / shares shares | Dec. 31, 2019 USD ($) ft² $ / shares | Dec. 31, 2022 USD ($) | Dec. 31, 2018 USD ($)
Medical Office [Member] |  |  |  |  |  |
Area of Real Estate Property (Square Foot) | ft² |  |  | 100,000 |  |  |
Retail [Member] |  |  |  |  |  |
Area of Real Estate Property (Square Foot) | ft² | 1,500 |  | 4,000 |  |  |
Multitenant Residential [Member] |  |  |  |  |  |
Number of Units in Real Estate Property |  |  | 200 |  |  |
Basis of Accounting, Liquidation [Member] |  |  |  |  |  |
Net Assets, Ending Balance | $ 22,487,944 |  | $ 31,369,637 |  |  | $ 26,846,670
Liquidation Basis of Accounting, Common Stock Per Share, Net (in dollars per share) | $ / shares | $ 15.17 |  | $ 21.16 |  |  |
Common Stock, Shares, Outstanding, Ending Balance (in shares) | shares | 1,482,680 |  |  |  |  |
Liquidation Basis of Accounting, Net Increase (Decrease) in Liquidation Value | $ (8,881,693) |  | $ 4,522,967 |  |  |
Liquidation Basis of Accounting, Net Increase (Decrease) in Liquidation Value Per Share (in dollars per share) | $ / shares | $ (5.99) |  |  |  |  |
Liquidation Basis of Accounting Change in Liquidation Value of Real Estate | $ (9,220,000) |  | 12,068,730 |  |  |
Liquidation Basis of Accounting, Remeasurement Gain (Loss) on Liability Retention Bonus Payments to Executives and Other Employees | 1,767,038 | [1] | (2,710,358) | [2] |  |
Liquidation Basis of Accounting, Remeasurement Gain (Loss) on Liability Selling Costs on Real Estate Assets | 439,203 | [1] | $ (1,060,124) | [2] |  |
Liquidation Basis of Accounting, Increase (Decrease) in Net Assets in Liquidation Value | $ 7,013,759 |  |  |  |  |
Liquidation Basis of Accounting, Increase (Decrease) in Net Assets in Liquidation Value, Per Share (in dollars per share) | $ / shares | $ 4.73 |  |  |  |  |
Liquidation Basis of Accounting, Land Entitlement Costs Incurred | $ 1,000,000 |  |  |  |  |
Liquidation Basis of Accounting, Common Stock Per Share (in dollars per share) | $ / shares | $ 15.17 |  | $ 21.16 |  |  |
Basis of Accounting, Liquidation [Member] | Change from Partly Residential Use to All Medical [Member] |  |  |  |  |  |
Liquidation Basis of Accounting Change in Liquidation Value of Real Estate | $ 3,820,000 |  |  |  |  |
Basis of Accounting, Liquidation [Member] | Market Driven Decline in Real Estate Value [Member] |  |  |  |  |  |
Liquidation Basis of Accounting Change in Liquidation Value of Real Estate | $ 5,400,000 |  |  |  |  |
Forecast [Member] |  |  |  |  |  |
Liquidation Basis of Accounting, Land Entitlement Costs |  |  |  |  | $ 1,500,000 |
Liquidation Basis of Accounting, Land Entitlement Costs Incurred, Amount Deferred |  |  |  |  | $ 321,000 |
[1] | The amounts reported are based on the provisions of the retention bonus plan and the reported amount of the real estate assets estimated net realizable value. Based on the estimated real estate value of the Cortlandt property, aggregate proceeds from the sale of the two Cortlandt lots would not exceed the adjusted floor under the retention bonus plan and therefore the above table only reflects the projected bonus from the sale of the Flowerfield property.
[2] | The amounts reported are based on the provisions of the retention bonus plan and the reported amount of the real estate assets estimated net realizable value.

X
- Definition Amount of change in real estate to reflect the change in value under liquidation basis. + References No definition available. + Details
Name: | gyro_LiquidationBasisOfAccountingChangeInLiquidationValueOfRealEstate
Namespace Prefix: | gyro_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the common stock per share that is expected to be distributed in liquidation. + References No definition available. + Details
Name: | gyro_LiquidationBasisOfAccountingCommonStockPerShare
Namespace Prefix: | gyro_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the common stock per share that is expected to be distributed in liquidation, net of any special distributions made. + References No definition available. + Details
Name: | gyro_LiquidationBasisOfAccountingCommonStockPerShareNet
Namespace Prefix: | gyro_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition The increase (decrease) in the value of net assets in liquidation during the period. + References No definition available. + Details
Name: | gyro_LiquidationBasisOfAccountingIncreaseDecreaseInNetAssetsInLiquidationValue
Namespace Prefix: | gyro_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The increase (decrease) in value of net assets in liquidation during the period, per share. + References No definition available. + Details
Name: | gyro_LiquidationBasisOfAccountingIncreaseDecreaseInNetAssetsInLiquidationValuePerShare
Namespace Prefix: | gyro_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of estimated land entitlement costs to dispose of assets or other items expected to be sold in liquidation. + References No definition available. + Details
Name: | gyro_LiquidationBasisOfAccountingLandEntitlementCosts
Namespace Prefix: | gyro_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of land entitlement costs to dispose of assets or other items expected to be sold in liquidation recognized in the period. + References No definition available. + Details
Name: | gyro_LiquidationBasisOfAccountingLandEntitlementCostsIncurred
Namespace Prefix: | gyro_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of estimated land entitlement costs that have been deferred. + References No definition available. + Details
Name: | gyro_LiquidationBasisOfAccountingLandEntitlementCostsIncurredAmountDeferred
Namespace Prefix: | gyro_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The net increase or decrease in liquidation value during the current period. + References No definition available. + Details
Name: | gyro_LiquidationBasisOfAccountingNetIncreaseDecreaseInLiquidationValue
Namespace Prefix: | gyro_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Net increase (decrease) in liquidation value per share used to offset liquidating distributions paid. + References No definition available. + Details
Name: | gyro_LiquidationBasisOfAccountingNetIncreaseDecreaseInLiquidationValuePerShare
Namespace Prefix: | gyro_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of gain (loss) from remeasurement of retention bonus payments to executives and other employees to reflect the change in value under liquidation basis. + References No definition available. + Details
Name: | gyro_LiquidationBasisOfAccountingRemeasurementGainLossOnLiabilityRetentionBonusPaymentsToExecutivesAndOtherEmployees
Namespace Prefix: | gyro_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of gain (loss) from remeasurement of selling costs on real estate assets to reflect the change in value under liquidation basis. + References No definition available. + Details
Name: | gyro_LiquidationBasisOfAccountingRemeasurementGainLossOnLiabilitySellingCostsOnRealEstateAssets
Namespace Prefix: | gyro_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Area of a real estate property. + References No definition available. + Details
Name: | us-gaap_AreaOfRealEstateProperty
Namespace Prefix: | us-gaap_
Data Type: | num:areaItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of net assets (liabilities). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=77885760&loc=SL35686385-199418 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 205 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=118262037&loc=d3e9915-115836 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 220 -Section S99 -Paragraph 3 -Subparagraph (SX 210.6-09(7)) -URI http://asc.fasb.org/extlink&oid=120401555&loc=SL114874367-224272 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 210 -Section S99 -Paragraph 2 -Subparagraph (SX 210.6-05(4)) -URI http://asc.fasb.org/extlink&oid=120401414&loc=d3e604008-122996 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 220 -Section S99 -Paragraph 3 -Subparagraph (SX 210.6-09(6)) -URI http://asc.fasb.org/extlink&oid=120401555&loc=SL114874367-224272 + Details
Name: | us-gaap_AssetsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_CommonStockSharesOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of units in a real estate property owned as of the balance sheet date. + References No definition available. + Details
Name: | us-gaap_NumberOfUnitsInRealEstateProperty
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=gyro_MedicalOfficeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=us-gaap_RetailMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=gyro_MultitenantResidentialMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementScenarioAxis=gyro_BasisOfAccountingLiquidationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_NatureOfExpenseAxis=gyro_ChangeFromPartlyResidentialUseToAllMedicalMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_NatureOfExpenseAxis=gyro_MarketDrivenDeclineInRealEstateValueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementScenarioAxis=srt_ScenarioForecastMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |