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Income Taxes (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 26, 2015 | Dec. 27, 2014
Income Taxes [Line Items] |  |  |
Unrecognized Tax Benefits, Period Increase (Decrease) | $ 374,000 |  |
Income (Loss) from Continuing Operations before Income Taxes, Foreign | 5,368,000 | $ (968,000) | $ (2,588,000)
Current: |  |  |
Federal | 0 | 0 | 0
State | 33,000 | 50,000 | 50,000
Current Foreign Tax Expense (Benefit) | 1,656,000 | 0 | 0
Foreign | 2,600,000 |  |
Other Tax Expense (Benefit) | 1,689,000 | 50,000 | 50,000
Total current provision | 3,130,000 | (25,000) | (180,000)
Deferred: |  |  |
Federal | (8,718,000) | (5,356,000) | (9,554,000)
State | (1,264,000) | (62,000) | (1,709,000)
Foreign | 2,308,000 | 188,000 | 411,000
Change in valuation allowance | 9,115,000 | 5,155,000 | 10,622,000
Total deferred provision | 1,441,000 | (75,000) | (230,000)
Total (benefit) provision for income taxes | 3,130,000 | (25,000) | (180,000)
Unrecognized Tax Benefits, Decrease Resulting from Current Period Tax Positions | 671,000 |  |
Unrecognized Tax Benefits, Income Tax Penalties Accrued | 30,000 |  |
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract] |  |  |
Tax provision at federal statutory rates | (6,965,000) | (5,187,000) | (9,964,000)
State tax liability | 22,000 | 33,000 | 33,000
Foreign deferred tax rate differential | (678,000) | 153,000 | 371,000
Foreign withholding | 1,441,000 | (75,000) | (196,000)
Outside basis in Kowon, net unremitted earnings | (958,000) | (180,000) | (394,000)
Non-deductible expenses | 259,000 | (402,000) | (21,000)
Increase in net state operating loss carryforwards | 775,000 | (158,000) | (177,000)
Other Income Tax Expense (Benefit), Continuing Operations | (142,000) | 719,000 | 1,089,000
Provision to tax return adjustments and state tax rate change | (66,000) | 264,000 | (516,000)
Tax credits | (762,000) | (501,000) | (610,000)
Effective Income Tax Rate Reconciliation, Deduction, Amount | 0 | 40,000 | 196,000
Non-deductible equity compensation | 360,000 | (34,000) | (687,000)
Effective Income Tax Rate Reconciliation, Tax Contingency, Amount | 671,000 | 0 | 0
Other, net | 58,000 | 148,000 | 74,000
Change in valuation allowance | 9,115,000 | 5,155,000 | 10,622,000
Total (benefit) provision for income taxes | 3,130,000 | (25,000) | (180,000)
Deferred tax liability: |  |  |
Foreign withholding liability | (2,571,000) | (1,207,000) |
Foreign unremitted earnings | (3,659,000) | (2,701,000) |
Deferred Tax assets: |  |  |
Federal net operating loss carryforwards | 46,968,000 | 28,984,000 |
State net operating loss carryforwards | 2,129,000 | 1,913,000 |
Foreign net operating loss carryforwards | 1,375,000 | 2,430,000 |
Equity awards | 2,258,000 | 2,249,000 |
Tax credits | 7,495,000 | 6,768,000 |
Equipment | 814,000 | 1,113,000 |
Investments | 3,535,000 | 3,240,000 |
Deferred Tax Assets, Other Tax Carryforwards | 5,823,000 | 3,667,000 |
Other | 10,300,000 |  |
Net deferred tax assets | 64,167,000 | 46,456,000 |
Valuation allowance | (66,738,000) | (47,663,000) |
Deferred Tax Assets, Net, Noncurrent | (2,571,000) | (1,207,000) |
Total (benefit) provision for income taxes | 3,130,000 | (25,000) | $ (180,000)
Operating Loss Carryforwards, Valuation Allowance | 7,700,000 |  |
Valuation Allowances and Reserves, Additions for Adjustments | 10,000,000 |  |
Deferred Tax Liabilities, Parent's Basis in Discontinued Operation | 3,700,000 |  |
Unrecognized Tax Benefits, Interest on Income Taxes Expense | $ 266,000 |  |
Maximum |  |  |
Deferred Tax assets: |  |  |
The state impact of any federal changes, subject to examination by various states (in years) | 1 year |  |
Segments excluding KTC |  |  |
Deferred Tax assets: |  |  |
Increase (decrease) in valuation allowance |  | $ 5,200,000 |
International jurisdictions | Minimum |  |  |
Deferred Tax assets: |  |  |
Income tax returns examination period | 3 years |  |
International jurisdictions | Maximum |  |  |
Deferred Tax assets: |  |  |
Income tax returns examination period | 7 years |  |
Federal |  |  |
Deferred Tax assets: |  |  |
Net operating loss carryforwards available for tax purposes | $ 134,000,000 |  |
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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