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Accrued Liabilities (Tables)
 12 Months Ended
Apr. 26, 2013
Accrued Liabilities [Abstract]  
Schedule of Accrued Liabilities

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

April 26,

 

April 27,

 

 

2013

 

2012

Payroll and other compensation

   

$
16,869,112 

   

$
14,540,169 

Clinical costs

 

 
1,040,772 

 

 
790,081 

Property tax and other tax accruals

 

 
550,697 

 

 
1,011,457 

Other accrued liabilities

 

 
2,539,385 

 

 
1,804,481 

 

   

$
20,999,966 

 

$
18,146,188