Financial Instruments Not Recorded at Fair Value (Detail) - USD ($) $ in Thousands |
Mar. 26, 2016 |
Dec. 26, 2015 |
|---|---|---|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
| Note payable | $ 400 | $ 458 |
| Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | ||
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] | ||
| Note payable | $ 400 | $ 458 |