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Related Party Transactions (Details) (USD $)
0 Months Ended
Jan. 07, 2015
Jan. 09, 2015
Santiago Peralta    
Related Party Transactions (Textual)    
Annual salary $ 80,000us-gaap_OfficersCompensation
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= dltz_SantiagoPeraltaMember
 
Bonus 5,000dltz_EmployeeBonus
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= dltz_SantiagoPeraltaMember
 
Mr. Malcolm W. Sherman's    
Related Party Transactions (Textual)    
One-time payout   $ 50,357us-gaap_PensionAndOtherPostretirementBenefitExpense
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= dltz_MalcolmW.ShermanMember