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Note 12 - Commitments - Payments Under Retention Bonus Plan (Details)	12 Months Ended
	Dec. 31, 2019 USD ($)
Distributions paid	$ 14,573
Board Members [Member]
Distributions paid	9,471
Chief Executive Officer [Member]
Distributions paid	2,390
Chief Operating Officer [Member]
Distributions paid	2,151
Other Employees [Member]
Distributions paid	$ 561

X

- Definition

Amount of distribution made to individual in accordance with deferred compensation arrangement.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	srt_TitleOfIndividualAxis=gyro_BoardMembersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_TitleOfIndividualAxis=srt_ChiefExecutiveOfficerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_TitleOfIndividualAxis=srt_ChiefOperatingOfficerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_TitleOfIndividualAxis=gyro_OtherEmployeesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: