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Summary of Significant Accounting Policies (Details)
 3 Months Ended 12 Months Ended
Mar. 31, 2021
USD ($)
Mar. 31, 2020
USD ($)
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 950,000 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 Korea Deposit Insurance Corporation provides insurance coverage up to 50,000,000 Won per customer. 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
Foreign currency translation adjustments (in Dollars) (166,000) $ (87,000)  
Foreign currency transactions, general and administrative expenses (in Dollars) 82,000 49,000  
Reduction of accounts receivable (in Dollars) 74,000   $ 74,000
Recognized revenues (in Dollars) 18,000    
Advertising costs (in Dollars) $ 19,000 $ 7,000  
Accounts Receivable [Member]      
Summary of Significant Accounting Policies (Details) [Line Items]      
Number of customers 5   3
Concentration risk, percentage 78.00%   62.00%
Sales Revenue, Net [Member]      
Summary of Significant Accounting Policies (Details) [Line Items]      
Concentration risk, percentage 10.00% 10.00%  
Pronode Technologies AB [Member]      
Summary of Significant Accounting Policies (Details) [Line Items]      
Noncontrolling interest owned by Pronode Technologies AB 51.00%    
Noncontrolling interest owned by Propoint AB 49.00%    
Airbar Sales [Member]      
Summary of Significant Accounting Policies (Details) [Line Items]      
Inventory reserve amount (in Dollars) $ 800,000   $ 900,000
Hewlett Packard Company [Member] | Sales Revenue, Net [Member]      
Summary of Significant Accounting Policies (Details) [Line Items]      
Concentration risk, percentage 19.00% 36.00%  
LG [Member] | Sales Revenue, Net [Member]      
Summary of Significant Accounting Policies (Details) [Line Items]      
Concentration risk, percentage 17.00%    
Seiko Epson Corporation [Member] | Sales Revenue, Net [Member]      
Summary of Significant Accounting Policies (Details) [Line Items]      
Concentration risk, percentage 15.00% 19.00%  
Lexmark Intl Inc [Member] | Sales Revenue, Net [Member]      
Summary of Significant Accounting Policies (Details) [Line Items]      
Concentration risk, percentage 14.00%    
Alpine [Member] | Sales Revenue, Net [Member]      
Summary of Significant Accounting Policies (Details) [Line Items]      
Concentration risk, percentage 13.00% 17.00%  
Noncontrolling Interest [Member]      
Summary of Significant Accounting Policies (Details) [Line Items]      
Equity ownership percentage 50.00%