Condensed Statements of Cash Flows (Parenthetical) (Unaudited) (USD $)	6 Months Ended
Jun. 30, 2011
Condensed Statements of Cash Flows [Abstract]
Property and equipment written off due to casualty loss	$ 719,336
Accumulated depreciation written off due to casualty loss	578,653
Insurance receivable related to casualty loss	$ 140,683

Property plant and equipment written off due to casualty loss.

No definition available.

Name:	dtrplll_PropertyAndEquipmentWrittenOffDueToCasualtyLoss
Namespace Prefix:	dtrplll_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration