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Income Taxes - Additional Information (Details) - USD ($) |  | 12 Months Ended
--- | --- | ---
Dec. 22, 2017 | Dec. 28, 2018 | Dec. 29, 2017 | Dec. 30, 2016
Income Taxes [Line Items] |  |  |  |
Income Tax Expense (Benefit) |  | $ 1,671,000 | $ (157,000) | $ (315,000)
Increase (Decrease) Deferred Tax Assets Valuation Allowance |  | 2,418,000 | (16,789,000) | 3,723,000
Increase (Decrease) In Foreign Deferred Tax Liabilities |  | 36,000 | (47,000) | $ (617,000)
Income tax reconciliation of global intangible low-taxed income |  | $ 7,700,000 |  |
Percentage of deduction in GILTI |  | 50.00% |  |
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount |  |  | $ 5,700,000 |
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 35.00% | 21.00% | 34.00% | 34.00%
Deferred Tax Assets, Net |  | $ 256,000 | $ 892,000 |
Stock-based compensation |  | 2,489,000 | 1,444,000 |
Taxes Payable |  | 820,000 | 29,000 |
Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax |  | 273,000 |  |
Operating Loss Carryforwards |  | $ 135,000,000 |  |
Operating Loss Carry Forwards Expiration Term |  | expire in varying amounts between 2020 and 2038 |  |
Operating Loss Carryforwards, Limitations on Use |  | The California net operating loss carryforwards expire in varying amounts between 2028 and 2038 |  |
STAAR Surgical AG |  |  |  |
Income Taxes [Line Items] |  |  |  |
Deferred Tax Assets, Net |  | $ 373,000 | 505,000 |
US |  |  |  |
Income Taxes [Line Items] |  |  |  |
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount |  |  | 7,500,000 |
Swiss |  |  |  |
Income Taxes [Line Items] |  |  |  |
Deferred Tax Liabilities, Net |  | 909,000 | 377,000 |
Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability, Undistributed Earnings of Foreign Subsidiaries |  | 1,282,000 | 881,000 |
JAPAN |  |  |  |
Income Taxes [Line Items] |  |  |  |
Deferred Tax Assets, Net |  | 905,000 | 722,000 |
Stock-based compensation |  | 44,000 |  |
California |  |  |  |
Income Taxes [Line Items] |  |  |  |
Operating Loss Carryforwards |  | 29,000,000 |  |
State |  |  |  |
Income Taxes [Line Items] |  |  |  |
Increase (Decrease) Deferred Tax Assets Valuation Allowance |  | $ 447,000 | $ (646,000) | $ (125,000)

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