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Income Taxes (Details Textual) - USD ($) | 12 Months Ended
--- | ---
Dec. 28, 2018 | Dec. 29, 2017 | Dec. 30, 2016 | Jan. 01, 2016
Income Taxes [Line Items] |  |  |  |
Income Tax Expense (Benefit) |  | $ (157,000) | $ (315,000) | $ 928,000
Operating Loss Carryforwards |  | 132,506,000 |  |
Taxes Payable |  | 29,000 | 409,000 |
Operating Loss Carryforwards, Valuation Allowance |  | 646,000 | 125,000 | 3,020,000
Deferred Tax Assets, Net |  | $ 892,000 | 224,000 |
Operating Loss Carryforwards, Limitations on Use |  | The California net operating loss carryforwards expire in varying amounts between 2028 and 2037. |  |
Operating Loss Carry Forwards Expiration Term |  | expire in varying amounts between 2020 and 2037. |  |
Increase (Decrease) In Foreign Deferred Tax Liabilities |  | $ 47,000 | 617,000 | (172,000)
Deferred Federal, State and Local, Tax Expense (Benefit) |  | 546,000 |  |
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount |  | $ (2,482,000) | $ (809,000) | $ 547,000
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent |  | 34.00% | 34.00% | 34.00%
Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax |  | $ 546,000 |  |
Scenario, Plan [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 21.00% |  |  |
STAAR Surgical AG [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Deferred Tax Assets, Net |  | 505,000 | $ 407,000 |
Japan [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Deferred Tax Assets, Net |  | 722,000 | 698,000 |
California [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Operating Loss Carryforwards |  | 23,807,000 |  |
UNITED STATES |  |  |  |
Income Taxes [Line Items] |  |  |  |
Deferred Tax Assets, Net |  | 19,125,000 |  |
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount |  | 5,658,000 |  |
Swiss [Member] |  |  |  |
Income Taxes [Line Items] |  |  |  |
Deferred Tax Liabilities, Net |  | 377,000 | 473,000 |
Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability, Undistributed Earnings of Foreign Subsidiaries |  | $ 881,000 | $ 881,000 |

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