v2.4.1.9

Segment Information - Summary of Reporting Information by Segment (Detail) (USD $)	3 Months Ended
	Mar. 28, 2015	Mar. 29, 2014	Dec. 27, 2014
Revenues from external customers
Total revenues	$ 6,313,379us-gaap_Revenues	$ 5,197,071us-gaap_Revenues
Income from operations
Total income from operations	(19,011)us-gaap_OperatingIncomeLoss	(531,370)us-gaap_OperatingIncomeLoss
Identifiable assets by segment
Total Identifiable assets	14,660,356us-gaap_Assets	15,101,919us-gaap_Assets	14,859,376us-gaap_Assets
Operating Segments [Member] | Factory-built Housing [Member]
Revenues from external customers
Total revenues	6,232,907us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = dvly_FactoryBuiltHousingMember	5,071,726us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = dvly_FactoryBuiltHousingMember
Income from operations
Total income from operations	(7,661)us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = dvly_FactoryBuiltHousingMember	(331,375)us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = dvly_FactoryBuiltHousingMember
Identifiable assets by segment
Total Identifiable assets	10,672,803us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = dvly_FactoryBuiltHousingMember	9,522,508us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = dvly_FactoryBuiltHousingMember
Operating Segments [Member] | Financial Services [Member]
Revenues from external customers
Total revenues	80,472us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = dvly_FinancialServicesMember	125,345us-gaap_Revenues / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = dvly_FinancialServicesMember
Income from operations
Total income from operations	52,315us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = dvly_FinancialServicesMember	(18,246)us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = dvly_FinancialServicesMember
Identifiable assets by segment
Total Identifiable assets	3,905,172us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = dvly_FinancialServicesMember	5,494,265us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementBusinessSegmentsAxis = dvly_FinancialServicesMember
Corporate, Non-Segment [Member]
Income from operations
Total income from operations	(63,665)us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember	(181,749)us-gaap_OperatingIncomeLoss / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember
Identifiable assets by segment
Total Identifiable assets	$ 82,381us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember	$ 85,146us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember

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- Definition

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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+ References

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688



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