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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)