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Summary of Significant Accounting Policies (Details)
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2021
USD ($)
Jun. 30, 2020
USD ($)
Jun. 30, 2021
USD ($)
shares
Jun. 30, 2020
USD ($)
Dec. 31, 2020
USD ($)
Summary of Significant Accounting Policies (Details) [Line Items]          
Noncontrolling interest, description     Neonode consolidates entities in which it has a controlling financial interest. We consolidate subsidiaries in which we hold, directly or indirectly, more than 50% of the voting rights.     
Insurance coverage, description     For deposits held with financial institutions in the U.S., the U.S. Federal Deposit Insurance Corporation provides basic deposit coverage with limits up to $250,000 per owner. The Swedish government provides insurance coverage up to 1,050,000 Krona per customer and covers deposits in all types of accounts. For bank accounts of the category held by Neonode, the Japanese government provides full insurance coverage. The Central Deposit Insurance Corporation in Taiwan provides insurance coverage up to 3,000,000 Taiwan Dollar per customer. At times, deposits held with financial institutions may exceed the amount of insurance provided.    
Allowance for doubtful accounts (in Dollars) $ 79,000   $ 79,000    
Inventory of bank guarantee production (in Shares) | shares     20,000    
Foreign currency translation adjustments (in Dollars) 56,000 $ (110,000) $ 64,000 $ (23,000)  
Foreign currency transactions, general and administrative expenses (in Dollars) (54,000) (63,000) 28,000 (14,000)  
Reduction of accounts receivable (in Dollars)     70,000   $ 78,000
Recognized revenues (in Dollars) 8,000   26,000    
Advertising costs (in Dollars) $ 39,000 $ 9,000 $ 58,000 $ 16,000  
Pronode Technologies AB [Member]          
Summary of Significant Accounting Policies (Details) [Line Items]          
Noncontrolling interest owned by Pronode Technologies AB 51.00%   51.00%    
Noncontrolling interest owned by Propoint AB 49.00%   49.00%    
Accounts Receivable [Member]          
Summary of Significant Accounting Policies (Details) [Line Items]          
Number of customers     4   3
Sales Revenue, Net [Member]          
Summary of Significant Accounting Policies (Details) [Line Items]          
Concentration risk, percentage 10.00% 10.00% 10.00% 10.00%  
Airbar Sales [Member]          
Summary of Significant Accounting Policies (Details) [Line Items]          
Inventory reserve amount (in Dollars) $ 800,000   $ 800,000   $ 900,000
Hewlett Packard Company [Member] | Sales Revenue, Net [Member]          
Summary of Significant Accounting Policies (Details) [Line Items]          
Concentration risk, percentage 30.00% 27.00% 31.00% 33.00%  
Seiko Epson Corporation [Member] | Sales Revenue, Net [Member]          
Summary of Significant Accounting Policies (Details) [Line Items]          
Concentration risk, percentage 17.00%   14.00%    
Alpine [Member] | Sales Revenue, Net [Member]          
Summary of Significant Accounting Policies (Details) [Line Items]          
Concentration risk, percentage 14.00%   13.00%    
Epson [Member] | Sales Revenue, Net [Member]          
Summary of Significant Accounting Policies (Details) [Line Items]          
Concentration risk, percentage   35.00%   24.00%  
Alpine []Member | Sales Revenue, Net [Member]          
Summary of Significant Accounting Policies (Details) [Line Items]          
Concentration risk, percentage   12.00%   17.00%  
Noncontrolling Interest [Member]          
Summary of Significant Accounting Policies (Details) [Line Items]          
Equity ownership percentage 50.00%   50.00%    
Unbilled Revenues [Member] | Accounts Receivable [Member]          
Summary of Significant Accounting Policies (Details) [Line Items]          
Concentration risk, percentage     70.00%   62.00%