Name:	gdef_CashHeldInTrust
Namespace Prefix:	gdef_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The total amount securities held by third party trustees pursuant to terms of debt instruments or other agreements as of the date of each statement of financial position presented, which can be used by the trustee only to pay the noncurrent portion of specified obligations.

No definition available.

Name:	gdef_InvestmentSecuritiesHeldInTrust
Namespace Prefix:	gdef_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The cash inflow associated with the amount received from entity's private placement held in trust account.

No definition available.

Name:	gdef_ProceedsFromPrivatePlacementHeldInTrust
Namespace Prefix:	gdef_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The cash inflow associated with the amount received from entity's offering of stock to the public and from private placement held in trust account.

No definition available.

Name:	gdef_ProceedsFromPublicOfferingAndPrivatePlacement
Namespace Prefix:	gdef_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The cash inflow associated with the amount received from entity's offering of stock to the public held in trust account.

No definition available.