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TRUST ACCOUNT (Details Textual) (USD $)
1 Months Ended 6 Months Ended 12 Months Ended
Oct. 29, 2013
Dec. 31, 2013
Dec. 31, 2014
Trust Account [Line Items]      
Proceeds from Issuance Initial Public Offering $ 73,545,000us-gaap_ProceedsFromIssuanceInitialPublicOffering $ 69,000,000us-gaap_ProceedsFromIssuanceInitialPublicOffering $ 0us-gaap_ProceedsFromIssuanceInitialPublicOffering
Proceeds from Issuance of Private Placement   7,215,000us-gaap_ProceedsFromIssuanceOfPrivatePlacement 0us-gaap_ProceedsFromIssuanceOfPrivatePlacement
Assets Held-in-trust, Total   72,810,956us-gaap_AssetsHeldInTrust 72,833,815us-gaap_AssetsHeldInTrust
Trust Account [Member]      
Trust Account [Line Items]      
Proceeds from Issuance or Sale of Equity     72,795,000us-gaap_ProceedsFromIssuanceOrSaleOfEquity
/ us-gaap_CashAndCashEquivalentsAxis
= gdef_TrustAccountMember
Proceeds from Issuance Initial Public Offering     65,580,000us-gaap_ProceedsFromIssuanceInitialPublicOffering
/ us-gaap_CashAndCashEquivalentsAxis
= gdef_TrustAccountMember
Proceeds from Issuance of Private Placement     7,215,000us-gaap_ProceedsFromIssuanceOfPrivatePlacement
/ us-gaap_CashAndCashEquivalentsAxis
= gdef_TrustAccountMember
Wells Fargo Money Market Mutual Fund [Member]      
Trust Account [Line Items]      
Assets Held-in-trust, Total   72,780,878us-gaap_AssetsHeldInTrust
/ us-gaap_CashAndCashEquivalentsAxis
= gdef_WellsFargoMoneyMarketMutualFundMember
72,830,252us-gaap_AssetsHeldInTrust
/ us-gaap_CashAndCashEquivalentsAxis
= gdef_WellsFargoMoneyMarketMutualFundMember
Cash [Member]      
Trust Account [Line Items]      
Assets Held-in-trust, Total   $ 30,078us-gaap_AssetsHeldInTrust
/ us-gaap_CashAndCashEquivalentsAxis
= us-gaap_CashMember
$ 3,563us-gaap_AssetsHeldInTrust
/ us-gaap_CashAndCashEquivalentsAxis
= us-gaap_CashMember