v2.4.0.8

Inventory Finance Notes Receivable and Allowance for Loan Loss - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 29, 2014	Mar. 30, 2013
Receivables [Abstract]
Period of periodic installments of principal and interest	24 months
Provision/(Benefit) for credit losses	$ 32,970	$ (16,180)

X

- Definition

Inventory finance notes receivable repayment period maximum.

+ References

No definition available.

+ Details

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Namespace Prefix:	dvly_
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Balance Type:	na
Period Type:	duration

X

- Definition

Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable.

+ 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 (a)

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



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.5)

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



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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 5

-Article 5

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

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