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Income Taxes (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 28, 2019 | Dec. 29, 2018 | Dec. 30, 2017
Income Taxes [Line Items] |  |  |
Proceeds from AMT Refund | $ 500,000 |  |
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent |  |  | 21.00%
Tax Cuts and Jobs Act of 2017, Remeasurement of Deferred for Reduction in Corporate Tax Rate, Income Tax Expense (Benefit) |  |  | $ 25,100,000
Unrecognized Tax Benefits | 394,000 | $ 394,000 | 394,000
Unrecognized Tax Benefits, Period Increase (Decrease) | 0 | 0 |
Income (Loss) from Continuing Operations before Income Taxes, Foreign | 1,300,000 | 700,000 | (400,000)
Deferred Tax Assets, Valuation Allowance | 65,566,000 | 58,006,000 |
Current: |  |  |
State | 4,000 | 5,000 | 5,000
Current Foreign Tax Expense (Benefit) | 104,000 | 25,000 | (568,000)
Total current provision | 108,000 | 30,000 | (563,000)
Deferred: |  |  |
Federal | (5,165,000) | (7,307,000) | 15,461,000
State | (2,341,000) | (360,000) | (493,000)
Foreign | (56,000) | 300,000 | (187,000)
Change in valuation allowance | 7,562,000 | 7,367,000 | (17,181,000)
Total deferred provision | 0 | 0 | (2,400,000)
Income Tax Expense (Benefit) | 108,000 | 30,000 | (2,963,000)
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract] |  |  |
Tax provision at federal statutory rates | (6,196,000) | (7,515,000) | (9,884,000)
State tax liability | 4,000 | 5,000 | 5,000
Foreign deferred tax rate differential | (64,000) | (39,000) | 15,000
Foreign withholding | 0 | (301,000) | (771,000)
Outside basis in Kowon, net unremitted earnings | 0 | (468,000) | (2,888,000)
Non-deductible expenses | 1,964,000 | 186,000 | 774,000
Increase in net state operating loss carryforwards | (1,985,000) | (406,000) | (300,000)
Other Income Tax Expense (Benefit), Continuing Operations | (148,000) | 0 | 0
Provision to tax return adjustments and tax rate change (1) | 803,000 | (76,000) | 24,833,000
Tax credits | (1,931,000) | (239,000) | (24,000)
Effective Income Tax Rate Reconciliation, Deduction, Amount | 0 | 13,000 | 199,000
Non-deductible equity compensation | 16,000 | 290,000 | 1,901,000
Effective Income Tax Rate Reconciliation, Tax Contingency, Amount | 105,000 | 91,000 | 203,000
Other, net | (22,000) | 45,000 | 107,000
Change in valuation allowance | 7,562,000 | 7,364,000 | (17,181,000)
Income Tax Expense (Benefit) | 108,000 | 30,000 | (2,963,000)
Deferred tax liability: |  |  |
Foreign withholding liability | (525,000) | (538,000) |
Deferred Tax assets: |  |  |
Federal net operating loss carryforwards | 44,820,000 | 41,755,000 |
State net operating loss carryforwards | 5,097,000 | 3,114,000 |
Foreign net operating loss carryforwards | 1,293,000 | 1,259,000 |
Equity awards | 428,000 | 444,000 |
Tax credits | 9,161,000 | 7,231,000 |
Equipment | 524,000 | 640,000 |
Investments | 2,641,000 | 1,848,000 |
Deferred Tax Assets, Other Tax Carryforwards | 1,603,000 | 1,707,000 |
Net deferred tax assets | 65,042,000 | 57,460,000 |
Deferred Tax Assets, Net, Noncurrent | (524,000) | (546,000) |
Income Tax Expense (Benefit) | 108,000 | 30,000 | $ (2,963,000)
Unrecognized Tax Benefits, Interest on Income Taxes Expense | 800,000 | $ 500,000 |
Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax | 1,000,000.0 |  |
AMT Receivable, Current | $ 300,000 |  |
Maximum |  |  |
Deferred Tax assets: |  |  |
The state impact of any federal changes, subject to examination by various states (in years) | 1 year |  |
International jurisdictions | Minimum |  |  |
Deferred Tax assets: |  |  |
Income tax returns examination period | 3 years |  |
International jurisdictions | Maximum |  |  |
Deferred Tax assets: |  |  |
Income tax returns examination period | 20 years |  |
Federal |  |  |
Deferred Tax assets: |  |  |
Net operating loss carryforwards available for tax purposes | $ 160,500,000 |  |
Operating Loss Carryforwards, Unlimited | $ 52,900,000 |  |
State | Minimum |  |  |
Deferred Tax assets: |  |  |
Income tax returns examination period | 3 years |  |
State | Maximum |  |  |
Deferred Tax assets: |  |  |
Income tax returns examination period | 5 years |  |

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