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Income Taxes - Additional Information (Details) - USD ($) | 12 Months Ended
--- | ---
Jan. 01, 2021 | Jan. 03, 2020 | Dec. 28, 2018
Income Taxes [Line Items] |  |  |
Income Tax Expense (Benefit) | $ 2,354,000 | $ (1,022,000) | $ 1,671,000
Reversal of valuation allowance | 495,000 |  |
Increase (Decrease) In Foreign Deferred Tax Liabilities | (213,000) | (46,000) | 36,000
Income tax reconciliation of global intangible low-taxed income | $ 21,300,000 | 15,100,000 | 7,700,000
Income tax holiday, description | The Company utilized the high-tax exception to exclude income from foreign jurisdictions with foreign taxes at an effective rate that is higher than 90 percent of the applicable highest U.S. corporate tax rate. |  |
Percentage of deduction in GILTI | 50.00% |  |
Deferred Tax Liabilities, Net | $ 4,844,000 | 3,810,000 |
Deferred Tax Assets, Net | 4,722,000 | 3,750,000 |
Taxes Payable | 4,650,000 | 2,572,000 |
Deferred tax assets, valuation allowance | 42,502,000 | 37,007,000 |
Operating Loss Carryforwards | $ 152,863,000 |  |
Operating Loss Carry Forwards Expiration Term | expire in varying amounts between 2021 and 2037 |  |
Operating Loss Carryforwards, Limitations on Use | The California net operating loss carryforwards expire in varying amounts between 2028 and 2039 |  |
Operating losses and research and development credits carryforwards limitations on use | . In 2020, California enacted Assembly Bill 85 which imposed limits on the usability of California state net operating losses and research and development credits in tax years beginning after 2019 and before 2023. |  |
Stock-based compensation | $ 3,277,000 | 2,859,000 |
STAAR Surgical AG |  |  |
Income Taxes [Line Items] |  |  |
Deferred Tax Liabilities, Net | 222,000 | 658,000 |
Federal and State |  |  |
Income Taxes [Line Items] |  |  |
Deferred Tax Assets, Net | 3,871,000 | 3,512,000 |
Federal |  |  |
Income Taxes [Line Items] |  |  |
Valuation allowance, deferred tax asset, increase (decrease), amount | 573,000 | 3,003,000 |
Deferred tax assets, valuation allowance | 34,681,000 | 30,308,000 |
Deferred tax asset, in foreign tax credits | 2,013,000 |  |
State |  |  |
Income Taxes [Line Items] |  |  |
Deferred Tax Assets, Net | 294,000 |  |
Valuation allowance, deferred tax asset, increase (decrease), amount | 78,000 | 373,000 |
Deferred tax assets, valuation allowance | 7,399,000 | 6,174,000 |
Swiss |  |  |
Income Taxes [Line Items] |  |  |
Deferred Tax Liabilities, Net | 222,000 | 658,000 |
Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability, Undistributed Earnings of Foreign Subsidiaries | 1,295,000 | 1,295,000 |
JAPAN |  |  |
Income Taxes [Line Items] |  |  |
Deferred Tax Assets, Net | 1,073,000 | 896,000 |
Stock-based compensation |  | $ 35,000 | $ 46,000
US |  |  |
Income Taxes [Line Items] |  |  |
Deferred Tax Assets, Net | 3,576,000 |  |
California |  |  |
Income Taxes [Line Items] |  |  |
Operating Loss Carryforwards | $ 27,275,000 |  |

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