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Impairment of Long-Lived Assets	12 Months Ended
	Dec. 31, 2017
Goodwill And Intangible Assets Disclosure [Abstract]
Impairment of Long-Lived Assets	Long-lived assets are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable.  In fiscal 2016, the Company did not recognize any impairment charges. In fiscal 2017 and 2015, the Company recognized non-cash impairment charges of $0.6 million and $0.2 million, respectively, related to certain underperforming stores. The lower-than-expected sales performance, coupled with future undiscounted cash flow projections, indicated that the carrying value of these stores’ assets exceeded their estimated fair values as determined by their future discounted cash flow projections. When projecting the stream of future cash flows associated with an individual store for purposes of determining long-lived asset recoverability, management considers local market conditions and makes assumptions about key store variables including sales growth rates, gross margin and operating expense. If economic conditions deteriorate in the markets in which the Company conducts business, or if other negative market conditions develop, the Company may experience additional impairment charges in the future for underperforming stores. These impairment charges are included in selling and administrative expense for fiscal 2017 and 2015 in the accompanying consolidated statements of operations.

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- Definition

The entire disclosure for the details of the charge against earnings resulting from the aggregate write down of all assets from their carrying value to their fair value. Disclosure may also include a description of the impaired asset and facts and circumstances leading to the impairment, amount of the impairment loss and where the loss is located in the income statement, method(s) for determining fair value, and the segment in which the impaired asset is reported.

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