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v3.20.1

Note 14 - Contingencies (Details Textual) | 1 Months Ended
--- | ---
Apr. 30, 2016 USD ($)
Putative Class Action Lawsuit [Member] |
Litigation Settlement, Amount Awarded to Other Party | $ 650,000

X
- Definition Amount awarded to other party in judgment or settlement of litigation. + References No definition available. + Details
Name: | us-gaap_LitigationSettlementAmountAwardedToOtherParty
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | srt_LitigationCaseAxis=gyro_PutativeClassActionLawsuitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |