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Income Taxes - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Jun. 27, 2013
Jun. 28, 2012
Jun. 30, 2011
Income Taxes Disclosure [Line Items]      
State tax benefit related to release of state valuation allowance     $ 190
State tax benefit related to out of period adjustment for excess state tax over book depreciation available in future periods     138
State tax benefit due to favorable resolution of state tax audit     74
State tax benefit for tax rate changes and tax provision adjustments     124
Tax benefit related to the current year research and development credit and the reinstatement of the prior year research and development credit     160
Tax benefit related to the Domestic Producers Deduction     297
Net tax benefit primarily related to a lower federal income tax bracket     41
Lower federal income tax bracket     34.00%
Net change in the total valuation allowance 815 (68)  
Gross state tax net operating losses expiration dates between 2017 and 2030    
Total gross amounts of unrecognized tax benefits 139 133  
United States [Member]
      
Income Taxes Disclosure [Line Items]      
Year of tax return audit 2011    
Illinois [Member]
      
Income Taxes Disclosure [Line Items]      
Year of tax return audit 2009    
California [Member]
      
Income Taxes Disclosure [Line Items]      
Year of tax return audit 2008    
State and Local Jurisdiction [Member]
      
Income Taxes Disclosure [Line Items]      
Gross state tax credits 239    
Gross state tax net operating losses $ 5,040