XML 50 R34.htm IDEA: XBRL DOCUMENT v3.21.1

Note 3 - Statements of Net Assets - Development of Cortlandt Manor Property (Details) - ft²	Dec. 31, 2020	Dec. 31, 2019
Medical Office Lot 2 [Member]
Building size/yield (Square Foot)	84,600
Medical Office Lot 1 [Member]
Building size/yield (Square Foot)	100,000
Retail [Member]
Building size/yield (Square Foot)	1,500	4,000

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

- Details

Name:	srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=gyro_MedicalOfficeLot2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=gyro_MedicalOfficeLot1Member
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: