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Organization and Significant Accounting Policies - Additional Information (Detail) (USD $)
0 Months Ended 3 Months Ended 12 Months Ended
Aug. 01, 2013
Mar. 31, 2015
Property
Tenants
State
Mar. 31, 2014
Dec. 31, 2014
Dec. 31, 1987
Organization And Significant Accounting Policies [Line Items]          
Aggregate capital contributions         $ 300us-gaap_PartnersCapitalAccountContributions
Number of Properties available to be leased   11us-gaap_NumberOfRealEstateProperties      
Number of states Partnership Property Located   4us-gaap_NumberOfStatesInWhichEntityOperates      
Allowance for doubtful accounts   25,483us-gaap_AllowanceForDoubtfulAccountsReceivable   25,483us-gaap_AllowanceForDoubtfulAccountsReceivable  
Accumulated amortization   138,229us-gaap_AmortizationOfDeferredCharges   136,963us-gaap_AmortizationOfDeferredCharges  
Deferred tenant award proceeds escrow, payment period 99 months        
Number of partnership's Properties leased to significant tenants   9zzdd_NumberOfPartnershipsPropertiesLeasedToSignificantTenants      
Number of significant tenants   3zzdd_NumberOfSignificantTenants      
Adjustments to carrying values   0zzdd_AdjustmentsToCarryingValues 0zzdd_AdjustmentsToCarryingValues    
Federal income taxes   0us-gaap_FederalIncomeTaxExpenseBenefitContinuingOperations      
Limited Partners [Member]          
Organization And Significant Accounting Policies [Line Items]          
Aggregate capital contributions         100us-gaap_PartnersCapitalAccountContributions
/ us-gaap_PartnerTypeOfPartnersCapitalAccountAxis
= us-gaap_LimitedPartnerMember
Number of Properties available to be leased   11us-gaap_NumberOfRealEstateProperties
/ us-gaap_PartnerTypeOfPartnersCapitalAccountAxis
= us-gaap_LimitedPartnerMember
     
Number of states Partnership Property Located   4us-gaap_NumberOfStatesInWhichEntityOperates
/ us-gaap_PartnerTypeOfPartnersCapitalAccountAxis
= us-gaap_LimitedPartnerMember
     
General Partner [Member]          
Organization And Significant Accounting Policies [Line Items]          
Aggregate capital contributions         $ 200us-gaap_PartnersCapitalAccountContributions
/ us-gaap_PartnerTypeOfPartnersCapitalAccountAxis
= us-gaap_GeneralPartnerMember
Wendgusta [Member]          
Organization And Significant Accounting Policies [Line Items]          
Property lease(s)   55.00%zzdd_EntityWideRevenueMajorCustomerPercentageTwo
/ us-gaap_PartnerTypeOfPartnersCapitalAccountAxis
= zzdd_WendgustaMember
     
Wendcharles I [Member]          
Organization And Significant Accounting Policies [Line Items]          
Property lease(s)   15.00%zzdd_EntityWideRevenueMajorCustomerPercentageTwo
/ us-gaap_PartnerTypeOfPartnersCapitalAccountAxis
= zzdd_WendcharlesOneMember
     
Wendcharles II [Member]          
Organization And Significant Accounting Policies [Line Items]          
Property lease(s)   8.00%zzdd_EntityWideRevenueMajorCustomerPercentageTwo
/ us-gaap_PartnerTypeOfPartnersCapitalAccountAxis
= zzdd_WendcharlesTwoMember