Transactions with Owners with Greater than Ten Percent Beneficial Interests - Advisory Board Fees Paid to Jesse Small (Detail) (USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Related Party Transactions [Abstract]
Advisory Board Fees paid	$ 3,500	$ 3,500	$ 3,500
Advisory Board Fees paid, Total	$ 3,500	$ 3,500	$ 3,500

Advisor board fees paid to owners with beneficial interest more than ten percent.

No definition available.

Name:	zzdd_AdvisorBoardFeesPaidToOwnersWithBeneficialInterestMoreThanTenPercent
Namespace Prefix:	zzdd_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration