| Related Party Transactions (Details Textual) (USD $) | 12 Months Ended | ||
|---|---|---|---|
| Dec. 31, 2012 | Dec. 31, 2011 | Jan. 01, 2011 | |
| Related Party Transactions (Textual) [Abstract] | |||
| Lease payments and expenses | $ 374,000 | $ 374,000 | $ 389,000 | 
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- Details 
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- Definition Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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