Income Taxes (Schedule of Deferred Tax Assets and Liabilities)(Details) - USD ($) $ in Thousands |
Dec. 27, 2015 |
Dec. 28, 2014 |
|---|---|---|
| Deferred tax assets: | ||
| Deferred Tax Assets, Operating Loss Carryforwards | $ 0 | $ 643 |
| Accrued liabilities | 588 | 536 |
| General business credits | 8,135 | 10,121 |
| Stock-based compensation | 1,121 | 856 |
| Other | 309 | 168 |
| Total deferred tax assets | 10,153 | 12,324 |
| Deferred tax liability: | ||
| Intangibles | (9,523) | (8,157) |
| Prepaid expenses | (1,371) | (590) |
| Property and equipment | (9,540) | (10,784) |
| Total deferred tax liabilities | (20,434) | (19,531) |
| Deferred tax liabilities, net | $ (10,281) | $ (7,207) |