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Financing Obligations (Details Textuals 2) (Equipment Loan, USD $)
In Millions, unless otherwise specified
6 Months Ended
Jun. 30, 2012
Mar. 29, 2012
Equipment Loan
   
Line of Credit Facility [Line Items]    
Revised annual capital expenditure limit $ 6  
Equipment purchased used as collateral   1.8
Availability Block Amount Set   4
Minimum Fixed charge ratio Alternative one 1.1  
Reduction in the Availability block, due to change in Fixed charged ratio alternative one 3  
Minimum Fixed charge ratio Alternative two 1.2  
Reduction in the Availability block, due to change in Fixed charged ratio alternative two $ 2.5