Income Taxes - Additional Information (Detail) - USD ($) |
12 Months Ended | |
|---|---|---|
Sep. 26, 2015 |
Sep. 27, 2014 |
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| Schedule Of Income Taxes [Line Items] | ||
| State tax net operating losses | $ 101,500,000 | |
| Foreign losses | 1,000,000 | |
| State income tax credits | 3,600,000 | |
| Valuation allowances | $ 6,205,000 | $ 6,215,000 |
| Period of uncertain tax positions as non-current income tax liabilities unless expected to be paid | 1 year | |
| Penalties were accrued related to uncertain tax positions | $ 0 | 0 |
| Unrecognized tax benefit may be recognized within twelve months as a result of a settlement | $ 100,000 | |
| Maximum [Member] | ||
| Schedule Of Income Taxes [Line Items] | ||
| State tax net operating losses expiration year | 2035 | |
| State income tax credits expiration year | 2031 | |
| Accrued interest | $ 100,000 | $ 100,000 |
| Minimum [Member] | ||
| Schedule Of Income Taxes [Line Items] | ||
| State tax net operating losses expiration year | 2015 | |
| State income tax credits expiration year | 2015 |
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- Definition Deferred tax assets state tax credit carryforwards. No definition available.
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- Definition Foreign losses. No definition available.
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- Definition Total state tax operating losses. No definition available.
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- Definition Operating loss carryforwards expiration year. No definition available.
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- Definition Period of uncertain tax positions as non-current income tax liabilities unless expected to be paid. No definition available.
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- Definition Schedule Of Income Taxes [Line Items] No definition available.
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- Definition State tax credit carryforward expiration year. No definition available.
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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized expected to be realized or consumed after one year (or the normal operating cycle, if longer). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of statutory penalties accrued for a tax position claimed or expected to be claimed by the entity, in its tax return. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of interest expense accrued for an underpayment of income taxes. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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