Transactions with Owners with Greater than Ten Percent Beneficial Interests - Advisory Board Fees Paid to Jesse Small (Detail) (USD $)	3 Months Ended	9 Months Ended
Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Related Party Transactions [Abstract]
Advisory Board Fees paid	$ 875	$ 875	$ 2,625	$ 2,625

Advisory board fees paid to owners with beneficial interest more than 10%.

No definition available.

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