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Obligations (Tables)
 6 Months Ended
Jun. 30, 2013
Debt Disclosure [Abstract]  
Schedule of Obligations
 
As of
 
June 30,
2013
 
December 30,
2012
 
(in thousands)
Capital lease obligations:
 

 
 

Capital leases
$
305

 
$
426

 
305

 
426

Current portion of capital lease obligations
(224
)
 
(160
)
Long term portion of capital lease obligations
$
81

 
$
266