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Selected Quarterly Financial Data (Unaudited) - Summary of the Company's Unaudited Quarterly Results of Operations (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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| Quarterly Financial Information Disclosure [Abstract] | ||||
| REVENUE | $ 8,657,872us-gaap_Revenues | $ 8,974,216us-gaap_Revenues | $ 30,247,725us-gaap_Revenues | $ 28,937,716us-gaap_Revenues |
| COST OF REVENUE | 6,829,838us-gaap_CostOfRevenue | 7,099,767us-gaap_CostOfRevenue | 24,495,255us-gaap_CostOfRevenue | 23,395,340us-gaap_CostOfRevenue |
| GROSS PROFIT | 1,828,034us-gaap_GrossProfit | 1,874,449us-gaap_GrossProfit | 5,752,470us-gaap_GrossProfit | 5,542,376us-gaap_GrossProfit |
| OPERATING EXPENSES: | ||||
| Selling, general and administrative | 1,240,806us-gaap_SellingGeneralAndAdministrativeExpense | 1,112,845us-gaap_SellingGeneralAndAdministrativeExpense | 4,692,077us-gaap_SellingGeneralAndAdministrativeExpense | 4,158,080us-gaap_SellingGeneralAndAdministrativeExpense |
| TOTAL OPERATING EXPENSES | 1,240,806us-gaap_OperatingExpenses | 1,112,845us-gaap_OperatingExpenses | ||
| OPERATING INCOME | 587,228us-gaap_OperatingIncomeLoss | 761,604us-gaap_OperatingIncomeLoss | 1,060,393us-gaap_OperatingIncomeLoss | 1,384,296us-gaap_OperatingIncomeLoss |
| OTHER INCOME (EXPENSES) | ||||
| Interest income | 100us-gaap_InvestmentIncomeInterest | 121us-gaap_InvestmentIncomeInterest | 461us-gaap_InvestmentIncomeInterest | 535us-gaap_InvestmentIncomeInterest |
| Interest expense | (8,979)us-gaap_InterestExpense | (10,342)us-gaap_InterestExpense | (37,637)us-gaap_InterestExpense | (43,052)us-gaap_InterestExpense |
| TOTAL OTHER EXPENSE | (8,879)us-gaap_NonoperatingIncomeExpense | (10,221)us-gaap_NonoperatingIncomeExpense | (34,976)us-gaap_NonoperatingIncomeExpense | (40,517)us-gaap_NonoperatingIncomeExpense |
| INCOME BEFORE INCOME TAXES | 578,349us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | 751,383us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | 1,025,417us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments | 1,343,779us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments |
| INCOME TAX EXPENSE | (176,737)us-gaap_IncomeTaxExpenseBenefit | (327,762)us-gaap_IncomeTaxExpenseBenefit | (374,278)us-gaap_IncomeTaxExpenseBenefit | (528,546)us-gaap_IncomeTaxExpenseBenefit |
| Net Income | $ 401,612us-gaap_NetIncomeLoss | $ 423,621us-gaap_NetIncomeLoss | $ 651,139us-gaap_NetIncomeLoss | $ 815,233us-gaap_NetIncomeLoss |
| Net Income Per Share (Basic) | $ 0.03dvly_NetIncomePerShareBasic | $ 0.03dvly_NetIncomePerShareBasic | ||
| Net Income Per Share (Fully Diluted) | $ 0.03dvly_NetIncomePerShareFullyDiluted | $ 0.03dvly_NetIncomePerShareFullyDiluted | ||
| Weighted Average Common Shares Outstanding | 15,436,518us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 15,493,116us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 15,436,518us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 15,493,116us-gaap_WeightedAverageNumberOfSharesOutstandingBasic |
| Weighted Average Common and Common Equivalent Shares Outstanding | 15,436,518us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 15,493,116us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 15,436,518us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 15,493,116us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding |
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- Definition
Net income per share basic. No definition available.
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- Definition
Net income per share fully diluted. No definition available.
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- Definition
The aggregate cost of goods produced and sold and services rendered during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Sum of operating profit and nonoperating income or expense before Income or Loss from equity method investments, income taxes, extraordinary items, and noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of the cost of borrowed funds accounted for as interest expense. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount before accretion (amortization) of purchase discount (premium) of interest income on nonoperating securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Includes selling, general and administrative expense. No definition available.
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- Details
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- Definition
The net result for the period of deducting operating expenses from operating revenues. No definition available.
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- Details
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- Definition
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). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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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