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Summary of Significant Accounting Policies - Computation of Net Loss Per Share (Detail) (USD $)
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3 Months Ended | 12 Months Ended | ||
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Dec. 27, 2014
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Dec. 28, 2013
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Dec. 27, 2014
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Dec. 28, 2013
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| Regulatory Assets [Abstract] | ||||
| Income attributable to common shareholders | $ 651,139dvly_IncomeAttributableToCommonShareholders | $ 815,233dvly_IncomeAttributableToCommonShareholders | ||
| Weighted average shares outstanding: | ||||
| Basic | 15,436,518us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 15,493,116us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 15,436,518us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 15,493,116us-gaap_WeightedAverageNumberOfSharesOutstandingBasic |
| Diluted | 15,436,518us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 15,493,116us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 15,436,518us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 15,493,116us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding |
| Income per share: | ||||
| Basic | $ 0.04us-gaap_EarningsPerShareBasic | $ 0.05us-gaap_EarningsPerShareBasic | ||
| Diluted | $ 0.04us-gaap_EarningsPerShareDiluted | $ 0.05us-gaap_EarningsPerShareDiluted | ||
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- Definition
Income attributable to common shareholders. No definition available.
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- Details
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- Details
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- Definition
The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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