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Income Taxes (Tables) | 12 Months Ended
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Dec. 29, 2017
Income Tax Disclosure [Abstract] |
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] | The provision (benefit) for income taxes consists of the following (in thousands):
|  | 2017 |  | 2016 |  | 2015 |
Current tax provision: |  |  |  |  |  |  |  |  |  |
U.S. federal |  | $ | — |  | $ | — |  | $ | — |
State |  |  | 12 |  |  | 18 |  |  | 12 |
Foreign |  |  | 378 |  |  | 1,031 |  |  | 443 |
Total current provision |  |  | 390 |  |  | 1,049 |  |  | 455 |
Deferred tax provision (benefit): |  |  |  |  |  |  |  |  |  |
U.S. federal and state |  |  | (546) |  |  | — |  |  | — |
Foreign provision |  |  | (1) |  |  | (1,364) |  |  | 473 |
Total deferred provision (benefit) |  |  | (547) |  |  | (1,364) |  |  | 473 |
Provision (benefit) for income taxes |  | $ | (157) |  | $ | (315) |  | $ | 928 |
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] | The provision (benefit) for income before taxes differs from the amount computed by applying the statutory federal income tax rate to income before taxes as follows (in thousands):
|  | 2017 |  | 2016 |  | 2015 |
Computed provision (benefit) for taxes based on income at statutory rate |  |  | 34.0 | % | $ | (781) |  |  | 34.0 | % | $ | (4,231) |  |  | 34.0 | % | $ | (1,905) |
Increase (decrease) in taxes resulting from: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Permanent differences |  |  | (0.9) |  |  | 21 |  |  | (3.0) |  |  | 373 |  |  | (0.6) |  |  | 33 |
Change in the future federal tax rate |  |  | (832.9) |  |  | 19,125 |  |  | — |  |  | — |  |  | — |  |  | — |
State minimum taxes, net of federal income tax benefit |  |  | (0.4) |  |  | 8 |  |  | (0.1) |  |  | 12 |  |  | (0.1) |  |  | 8 |
State tax benefit |  |  | 8.3 |  |  | (190) |  |  | 6.2 |  |  | (767) |  |  | (6.6) |  |  | 370 |
Tax rate difference due to foreign statutory rate |  |  | (1.2) |  |  | 29 |  |  | (8.9) |  |  | 1,109 |  |  | 1.6 |  |  | (90) |
Expiration of state net operating tax loss carryforwards |  |  | (36.5) |  |  | 836 |  |  | (7.2) |  |  | 892 |  |  | (47.3) |  |  | 2,650 |
Foreign earnings not permanently reinvested, net of the participation exemption |  |  | 108.1 |  |  | (2,482) |  |  | 6.5 |  |  | (809) |  |  | (9.8) |  |  | 547 |
Foreign dividend withholding |  |  | (0.3) |  |  | 7 |  |  | 3.8 |  |  | (478) |  |  | (3.8) |  |  | 211 |
Expiration of charitable contribution carryover |  |  | — |  |  | — |  |  | (0.1) |  |  | 12 |  |  | (0.3) |  |  | 15 |
Other |  |  | (2.6) |  |  | 59 |  |  | 1.2 |  |  | (151) |  |  | 2.5 |  |  | (140) |
Valuation allowance |  |  | 731.2 |  |  | (16,789) |  |  | (29.9) |  |  | 3,723 |  |  | 13.8 |  |  | (771) |
Effective tax provision (benefit) rate |  |  | 6.8 | % | $ | (157) |  |  | 2.5 | % | $ | (315) |  |  | (16.6) | % | $ | 928 |
Schedule of Deferred Tax Assets and Liabilities [Table Text Block] | Significant components of the Company's deferred tax assets (liabilities) as of December 29, 2017 and December 30, 2016 are as follows (in thousands):
|  | 2017 |  | 2016 |
Deferred tax assets: |  |  |  |  |  |  |
Allowance for doubtful accounts and sales returns |  | $ | 230 |  | $ | 244 |
Inventories |  |  | 381 |  |  | 662 |
Accrued vacation |  |  | 322 |  |  | 437 |
Accrued other expenses |  |  | 559 |  |  | 596 |
Stock-based compensation |  |  | 1,444 |  |  | 2,154 |
Pensions |  |  | 720 |  |  | 625 |
Depreciation and amortization |  |  | 959 |  |  | 1,060 |
Net operating loss carryforwards |  |  | 33,770 |  |  | 53,232 |
Business, foreign, AMT and R&;D credit carryforwards |  |  | 3,706 |  |  | 1,665 |
Prepaid Expenses |  |  | 188 |  |  | — |
Capitalized R&;D |  |  | 941 |  |  | 920 |
Other |  |  | 92 |  |  | 94 |
Valuation allowance |  |  | (40,656) |  |  | (57,446) |
Total deferred tax assets |  | $ | 2,656 |  | $ | 4,243 |
Deferred tax liabilities: |  |  |  |  |  |  |
Foreign tax withholding |  | $ | (881) |  | $ | (881) |
Amortization of R&;D |  |  | (723) |  |  | (670) |
Net Foreign earnings not permanently reinvested |  |  | (160) |  |  | (2,468) |
Total deferred tax liabilities |  |  | (1,764) |  |  | (4,019) |
Total net non-current deferred tax assets |  | $ | 892 |  | $ | 224 |
Summary of Income Tax Examinations [Table Text Block] | The following tax years remain subject to examination:
Significant Jurisdictions |  | Open Years
U.S. Federal |  | 2014 – 2016
California |  | 2013 – 2016
Switzerland |  | 2016
Japan |  | 2015 – 2016
Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] | Loss from continuing operations before provision (benefit) for income taxes is as follows (in thousands):
|  | 2017 |  | 2016 |  | 2015 |
Domestic |  | $ | (3,318) |  | $ | (10,399) |  | $ | (7,678) |
Foreign |  |  | 1,022 |  |  | (2,045) |  |  | 2,073 |
|  | $ | (2,296) |  | $ | (12,444) |  | $ | (5,605) |

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- Definition Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319 + Details
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- Definition Tabular disclosure of income tax examinations that an enterprise is currently subject to or that have been completed in the current period typically including a description of the examination, the jurisdiction conducting the examination, the tax year(s) under examination, the likelihood of an unfavorable settlement, the range of possible losses, the liability recorded, the increase or decrease in the liability from the prior period, and any penalties and interest that have been recorded. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 55 -Paragraph 217 -URI http://asc.fasb.org/extlink&oid=96868398&loc=d3e36027-109320 + Details
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