XML 38 R39.htm IDEA: XBRL DOCUMENT v3.20.1

Note 11 - Concentration of Credit Risk (Details Textual)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
State Agency [Member]
Increase in Space Leased, Percentage		93.00%
Rental Income [Member]
Number of Major Customers		3
Customer Concentration Risk [Member] | Rental Income [Member] | Customer 1 [Member]
Concentration Risk, Percentage		23.00%
Customer Concentration Risk [Member] | Rental Income [Member] | Customer 2 [Member]
Concentration Risk, Percentage		20.00%
Customer Concentration Risk [Member] | Rental Income [Member] | Customer 3 [Member]
Concentration Risk, Percentage		7.00%
Customer Concentration Risk [Member] | Rental Income [Member] | Small Business [Member] | Forecast [Member]
Concentration Risk, Percentage	39.00%

X

- Definition

The percentage of increase in the space leased by the company.

+ References

No definition available.

+ Details

Name:	gyro_IncreaseInSpaceLeasedPercentage
Namespace Prefix:	gyro_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of major customers

+ References

No definition available.

+ Details

Name:	gyro_NumberOfMajorCustomers
Namespace Prefix:	gyro_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13531-108611

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13537-108611

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592

+ Details

Name:	us-gaap_ConcentrationRiskPercentage1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	srt_MajorCustomersAxis=gyro_StateAgencyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ConcentrationRiskByTypeAxis=gyro_RentalIncomeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ConcentrationRiskByTypeAxis=us-gaap_CustomerConcentrationRiskMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=gyro_RentalIncomeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_MajorCustomersAxis=gyro_Customer1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_MajorCustomersAxis=gyro_Customer2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_MajorCustomersAxis=gyro_Customer3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_MajorCustomersAxis=gyro_SmallBusinessMember
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: