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Nature of Business and Summary of Significant Accounting Policies - Schedule of Vendor and Merchandise Concentrations (Detail)
 12 Months Ended
Jan. 31, 2015
Feb. 01, 2014
Feb. 02, 2013
Product Information [Line Items]      
Total percentage of net sales 100.00%us-gaap_ConcentrationRiskPercentage1 100.00%us-gaap_ConcentrationRiskPercentage1 100.00%us-gaap_ConcentrationRiskPercentage1
Men's Apparel [Member]      
Product Information [Line Items]      
Total percentage of net sales 46.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ProductOrServiceAxis
= psun_ProductOneMember		 46.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ProductOrServiceAxis
= psun_ProductOneMember		 48.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ProductOrServiceAxis
= psun_ProductOneMember
Women's Apparel [Member]      
Product Information [Line Items]      
Total percentage of net sales 39.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ProductOrServiceAxis
= psun_ProductTwoMember		 39.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ProductOrServiceAxis
= psun_ProductTwoMember		 37.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ProductOrServiceAxis
= psun_ProductTwoMember
Accessories and Footwear [Member]      
Product Information [Line Items]      
Total percentage of net sales 15.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ProductOrServiceAxis
= psun_ProductThreeMember		 15.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ProductOrServiceAxis
= psun_ProductThreeMember		 15.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ProductOrServiceAxis
= psun_ProductThreeMember