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Summary of Significant Accounting Policies and Nature of Operations (Details Textual) (USD $)
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3 Months Ended | 12 Months Ended | 3 Months Ended | |||||||||||||
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Mar. 30, 2013
Criteria
Segment
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Mar. 31, 2012
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Dec. 29, 2012
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Dec. 31, 2011
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Mar. 30, 2013
Property and equipment [Member]
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Dec. 29, 2012
Property and equipment [Member]
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Dec. 29, 2012
Intangible assets [Member]
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Mar. 31, 2012
Intangible assets [Member]
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Mar. 30, 2013
Website and Software Development [Member]
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Dec. 29, 2012
Website and Software Development [Member]
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Mar. 31, 2012
Website and Software Development [Member]
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Mar. 30, 2013
Website and Software Development [Member]
Minimum [Member]
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Mar. 30, 2013
Website and Software Development [Member]
Maximum [Member]
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Mar. 30, 2013
Auto MD [Member]
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Mar. 31, 2012
Auto MD [Member]
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Dec. 29, 2012
Auto MD [Member]
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| Summary of Significant Accounting Policies and Nature of Operations (Additional Textual) [Abstract] | ||||||||||||||||
| Capitalization amount amortized on straight line basis over a period | 2 years | 3 years | ||||||||||||||
| Impairment loss | $ 0 | $ 900,000 | $ 0 | |||||||||||||
| Impairment losses on long-lived assets and intangibles | 0 | 1,900,000 | 1,700,000 | 0 | ||||||||||||
| Significant revenues generated from Auto MD | 0 | |||||||||||||||
| Total expenses incurred on Auto MD related to depreciation and amortization expense | 500,000 | 500,000 | ||||||||||||||
| Total Assets for Auto MD related to capitalized website and software development costs | 81,347,000 | 88,877,000 | 2,300,000 | 2,100,000 | ||||||||||||
| Summary of Significant Accounting Policies and Nature of Operations (Textual) [Abstract] | ||||||||||||||||
| Net loss | (3,343,000) | (788,000) | 36,000,000 | 15,100,000 | ||||||||||||
| Revenues | 65,405,000 | 87,436,000 | ||||||||||||||
| Original maturity of money market funds and short-term investments purchased | 90 days | |||||||||||||||
| Other than temporary impairment charges on investments | 0 | 0 | ||||||||||||||
| Inventory | 37,633,000 | 42,727,000 | ||||||||||||||
| Inventory in-transit | 3,200,000 | 6,400,000 | ||||||||||||||
| Number of criteria for revenue recognition | 4 | |||||||||||||||
| Limited warranty description | The Company or the vendors supplying its products provide the Company’s customers limited warranties on certain products that range from 30 days to lifetime. | |||||||||||||||
| Standard product warranty useful life, minimum | 1 year | |||||||||||||||
| Standard product warranty useful life, maximum | 5 years | |||||||||||||||
| Extended product warranty description | The product brands that include the extended warranty coverage are offered at three different service levels: (a) a five year unlimited product replacement, (b) a five year one-time product replacement, and (c) a three year one-time product replacement. | |||||||||||||||
| Advertising costs | 4,300,000 | 6,100,000 | ||||||||||||||
| The likeliness that the tax position will be realized upon ultimate settlement | 50.00% | |||||||||||||||
| Unrecognized tax benefits, interest or penalties | $ 0 | |||||||||||||||
| Number of reporting units | 2 | |||||||||||||||
| Number of reportable segments | 2 | |||||||||||||||