Former General Partners' Capital Accounts - Additional Information (Detail) - USD ($)	Jun. 30, 2015	Dec. 31, 2014	Dec. 31, 1993	May. 26, 1993
Former General Partners Capital Accounts [Abstract]
Reallocation of Former General Partners' Deficit Capital	$ 840,229	$ 840,229	$ 840,229	$ 840,229

The reallocation of the former general partners' deficit capital account to the limited partners capital account.

No definition available.

Name:	zzdd_ReallocationOfFormerGeneralPartnersDeficitCapital
Namespace Prefix:	zzdd_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant