v2.4.1.9

Property, Plant, and Equipment - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 27, 2014	Dec. 28, 2013
Property Plant and Equipment Useful Life and Values [Abstract]
Depreciation expense	$ 172,607us-gaap_Depreciation	$ 212,951us-gaap_Depreciation

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- Details

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Namespace Prefix:	dvly_
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Period Type:	duration

X

- Definition

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

+ Details

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