Quarterly report pursuant to Section 13 or 15(d)

Legal Proceedings (Details)

v2.4.1.9
Legal Proceedings (Details) (USD $)
Jul. 25, 2012
Dec. 27, 2014
Sep. 28, 2013
Pending Litigation [Member]      
Loss Contingencies [Line Items]      
Recommended civil penalty $ 900,000us-gaap_LossContingencyEstimateOfPossibleLoss
/ us-gaap_LitigationStatusAxis
= us-gaap_PendingLitigationMember
   
California Wage and Hour Litigation [Member]      
Loss Contingencies [Line Items]      
Minimum estimated loss   15,000us-gaap_LossContingencyRangeOfPossibleLossMinimum
/ us-gaap_LitigationCaseAxis
= dla_CaliforniaWageandHourLitigationMember
 
Maximum estimated loss   975,000us-gaap_LossContingencyRangeOfPossibleLossMaximum
/ us-gaap_LitigationCaseAxis
= dla_CaliforniaWageandHourLitigationMember
975,000us-gaap_LossContingencyRangeOfPossibleLossMaximum
/ us-gaap_LitigationCaseAxis
= dla_CaliforniaWageandHourLitigationMember
California Wage and Hour Litigation [Member] | Pending Litigation [Member]      
Loss Contingencies [Line Items]      
Minimum estimated loss   25,000us-gaap_LossContingencyRangeOfPossibleLossMinimum
/ us-gaap_LitigationCaseAxis
= dla_CaliforniaWageandHourLitigationMember
/ us-gaap_LitigationStatusAxis
= us-gaap_PendingLitigationMember
 
Maximum estimated loss   $ 900,000us-gaap_LossContingencyRangeOfPossibleLossMaximum
/ us-gaap_LitigationCaseAxis
= dla_CaliforniaWageandHourLitigationMember
/ us-gaap_LitigationStatusAxis
= us-gaap_PendingLitigationMember