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Income Taxes - Tax Effect of Temporary Differences and Carryforwards that Give Rise to Significant Portions of the Net Deferred Tax Assets (Details) - USD ($) $ in Thousands | Jan. 02, 2016 | Jan. 03, 2015
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Tax effect of temporary differences and carryforwards that give rise to significant portions of the net deferred tax assets |  |
Net operating losses | $ 4,135 | $ 4,278
Research and development credits | 1,820 | 1,575
Accruals and reserves | 1,823 | 1,681
Deferred revenue | 120 | 113
Property and equipment | 399 | 439
Intangible assets | 792 | 825
Stock compensation | 613 | 676
Other tax credits | 89 | 94
Net deferred tax asset | 9,791 | 9,681
Valuation allowance | (806) | (905)
Net deferred tax assets | $ 8,985 | $ 8,776

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