COMMITMENTS & CONTINGENCIES (Details Textual)	12 Months Ended
Dec. 31, 2014
Commitments And Contingencies [Line Items]
Percentage Of Underwriting Discount	3.00%gdef_PercentageOfUnderwritingDiscount
Underwriter [Member]
Commitments And Contingencies [Line Items]
Deferred Fees Percentage	2.75%

Represents the percentage of underwriting discount paid in cash at the closing of the public offering to underwriters.

No definition available.

Name:	gdef_PercentageOfUnderwritingDiscount
Namespace Prefix:	gdef_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration