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Income Taxes - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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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 |  |

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- Definition Income tax reconciliation state and local income taxes benefit due to favourable resolution. + References No definition available. + Details
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to revisions of previously reported income tax expense (benefit). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 + Details
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to state and local income tax expense (benefit). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Subparagraph 1 -Article 4 + Details
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to research tax credit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 + Details
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