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RELATED PARTY TRANSACTIONS (Details Textual) (USD $)
1 Months Ended 6 Months Ended 12 Months Ended 0 Months Ended 1 Months Ended
Oct. 31, 2013
Dec. 31, 2013
Dec. 31, 2014
May 15, 2014
Jul. 31, 2013
Related Party Transaction [Line Items]          
Due to Affiliate, Current   $ 80,105us-gaap_DueToAffiliateCurrent $ 248,536us-gaap_DueToAffiliateCurrent    
Notes Payable, Related Parties, Current   0us-gaap_NotesPayableRelatedPartiesClassifiedCurrent 1,263,263us-gaap_NotesPayableRelatedPartiesClassifiedCurrent    
Stock Issued During Period, Value, New Issues   25,000us-gaap_StockIssuedDuringPeriodValueNewIssues      
Sponsor Fees 10,000us-gaap_SponsorFees   1,511,799us-gaap_SponsorFees    
Business Combination Description OF Share Issued     50% of such shares will be released from escrow six months after the closing of the Business Combination. The remaining 50% of the Sponsor’s Shares will be released from escrow one year after the closing of the Business Combination.    
Proceeds from Issuance of Private Placement   7,215,000us-gaap_ProceedsFromIssuanceOfPrivatePlacement 0us-gaap_ProceedsFromIssuanceOfPrivatePlacement    
Debt Instrument, Maturity Date     Jul. 24, 2015    
Shares Issued, Price Per Share     $ 10.00us-gaap_SharesIssuedPricePerShare    
Private Placement [Member]          
Related Party Transaction [Line Items]          
Stock Issued During Period, Shares, New Issues     721,500us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_PrivatePlacementMember
   
Stock Issued During Period, Shares, Issued for Overallotment     76,500gdef_StockIssuedDuringPeriodSharesIssuedForOverallotment
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_PrivatePlacementMember
   
Proceeds from Issuance of Private Placement     7,215,000us-gaap_ProceedsFromIssuanceOfPrivatePlacement
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_PrivatePlacementMember
   
Proceeds From Issuance Of Private Placement Included In Overallotment     76,500gdef_ProceedsFromIssuanceOfPrivatePlacementIncludedInOverallotment
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_PrivatePlacementMember
   
Shares Issued, Price Per Share     $ 10.00us-gaap_SharesIssuedPricePerShare
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_PrivatePlacementMember
   
Sponsor [Member]          
Related Party Transaction [Line Items]          
Due to Affiliate, Current   80,105us-gaap_DueToAffiliateCurrent
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= gdef_SponsorMember
168,431us-gaap_DueToAffiliateCurrent
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= gdef_SponsorMember
263,263us-gaap_DueToAffiliateCurrent
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= gdef_SponsorMember
 
Notes Payable, Related Parties, Current       1,263,263us-gaap_NotesPayableRelatedPartiesClassifiedCurrent
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= gdef_SponsorMember
 
Additional Working Capital In Advance       1,000,000gdef_AdditionalWorkingCapitalInAdvance
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= gdef_SponsorMember
 
Stock Issued During Period, Shares, New Issues         2,003,225us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= gdef_SponsorMember
Stock Issued During Period, Value, New Issues         $ 25,000us-gaap_StockIssuedDuringPeriodValueNewIssues
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= gdef_SponsorMember