XML 51 R35.htm IDEA: XBRL DOCUMENT v3.21.1

Note 4 - Estimated Liquidation and Operating Costs Net of Estimated Receipts (Details Textual) - Closing of the First Property Lot Sale, Subject of Either Flowerfield or Cortlandt Manor Subidivision [Member]	12 Months Ended
	Dec. 31, 2020 USD ($)
Liquidation Basis of Accounting, Land Entitlement Costs Incurred, Amount Deferred	$ 321,000
Liquidation Basis of Accounting, Land Entitlement Costs Incurred	$ 1,500,000

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

- Details

Name:	srt_StatementScenarioAxis=gyro_ClosingOfTheFirstPropertyLotSaleSubjectOfEitherFlowerfieldOrCortlandtManorSubidivisionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: