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Income Taxes (Details 2) (USD $) In Thousands, unless otherwise specified | Jan. 03, 2014 | Dec. 28, 2012
--- | --- | ---
Current deferred tax assets (liabilities): |  |
Allowance for doubtful accounts and sales returns | $ 21 | $ 89
Inventories | 11 | 190
Accrued vacation | 375 | 534
State taxes | 0 | 3
Other | (137) | (111)
Valuation allowance | (741) | (1,331)
Accrued other expenses | 105 | 187
Total current deferred tax liabilities | (366) | (439)
Non-current deferred tax assets (liabilities): |  |
Net operating loss carryforwards | 50,409 | 51,533
Stock-based compensation | 2,212 | 1,602
Business, foreign and AMT credit carryforwards | 921 | 844
Capitalized R&D | 525 | 605
Contributions | 57 | 58
Pensions | 731 | 877
Depreciation and amortization | 360 | 202
Foreign tax withholding | (1,129) | (885)
Foreign earnings not permanently reinvested | (4,992) | (5,783)
Other | (40) | 11
Valuation allowance | (50,082) | (49,762)
Total non-current deferred tax liabilities | $ (1,028) | $ (698)

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