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Income Taxes (Details 2) - USD ($) $ in Thousands | Jan. 01, 2016 | Jan. 02, 2015
--- | --- | ---
Current deferred tax assets (liabilities): |  |
Allowance for doubtful accounts and sales returns | $ 90 | $ 127
Inventories | 422 | 511
Accrued vacation | 382 | 397
Accrued other expenses | 176 | 119
Other | 57 | 80
Valuation allowance | (1,058) | (939)
Total current deferred tax assets (liabilities) | 69 | 295
Non-current deferred tax assets (liabilities): |  |
Net operating loss carryforwards | 51,005 | 53,747
Stock-based compensation | 1,763 | 1,684
Business, foreign and AMT credit carryforwards | 1,730 | 1,223
Capitalized R&D | 134 | 423
Contributions | 17 | 37
Pensions | 583 | 489
Depreciation and amortization | 695 | 870
Foreign tax withholding | (1,627) | (1,326)
Foreign earnings not permanently reinvested | (3,209) | (5,022)
Other | 13 | 31
Valuation allowance | (52,275) | (53,165)
Total non-current deferred tax liabilities | $ (1,171) | $ (1,009)

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