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Summary of Significant Accounting Policies (Details Textual) | 12 Months Ended
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Dec. 31, 2018 USD ($) Customers | Dec. 31, 2017 USD ($) Customers $ / shares
Summary of Significant Accounting Policies (Textual) |  |
Finished goods | $ 753,000 | $ 759,000
Research and development | 5,278,000 | 6,078,000
Basic deposit coverage limits per owner and customer | 250,000 |
Allowance for doubtful accounts | 149,000 | 149,000
Costs capitalized in projects in process |  | 1,000
Foreign currency translation included in general and administrative expense | (163,000) | 84,000
Foreign currency translation adjustments | $ (357,000) | $ 72,000
Concentration risk, percentage | 100.00% | 100.00%
Advertising costs | $ 120,000 | $ 602,000
Noncontrolling interest, Description | Generally, any interest that holds less than 50% of the outstanding voting shares is deemed to be a noncontrolling interest. |
Investment in joint venture | $ 3,000 | 3,000
Deferred revenues current | 75,000 | 1,248,000
Contract Assets [Member] |  |
Summary of Significant Accounting Policies (Textual) |  |
Basic deposit coverage limits per owner and customer | 1,800,000 | 1,000,000
Current accounts receivable net of allowance for doubtful accounts | 2,200,000 |
Contract Liabilities [Member] |  |
Summary of Significant Accounting Policies (Textual) |  |
Deferred revenue | 75,000 | 1,200,000
Deferred revenues current | $ 900,000 |
Pronode Technologies AB [Member] |  |
Summary of Significant Accounting Policies (Textual) |  |
Noncontrolling interest owned by Propoint AB | 49.00% |
Neonode Technologies AB [Member] |  |
Summary of Significant Accounting Policies (Textual) |  |
Noncontrolling interest owned by Pronode Technologies AB | 51.00% |
Europe [Member] |  |
Summary of Significant Accounting Policies (Textual) |  |
Net assets (liabilities) | $ 7,187,000 | 5,418,000
Asia [Member] |  |
Summary of Significant Accounting Policies (Textual) |  |
Net assets (liabilities) | 72,000 | 72,000
UNITED STATES |  |
Summary of Significant Accounting Policies (Textual) |  |
Net assets (liabilities) | 2,537,000 | $ 2,373,000
Sweden [Member] | Euro [Member] |  |
Summary of Significant Accounting Policies (Textual) |  |
Basic deposit coverage limits per owner and customer | 100,000 |
Japan [Member] | Yen [Member] |  |
Summary of Significant Accounting Policies (Textual) |  |
Basic deposit coverage limits per owner and customer | 10,000,000 |
Korea [Member] | Won [Member] |  |
Summary of Significant Accounting Policies (Textual) |  |
Basic deposit coverage limits per owner and customer | 50,000,000 |
Taiwan [Member] | Taiwan Dollar [Member] |  |
Summary of Significant Accounting Policies (Textual) |  |
Basic deposit coverage limits per owner and customer | $ 3,000,000 |
Sales Revenue, Net [Member] |  |
Summary of Significant Accounting Policies (Textual) |  |
Concentration risk, percentage | 10.00% |
Accounts Receivable [Member] |  |
Summary of Significant Accounting Policies (Textual) |  |
Concentration risk, percentage | 66.00% | 69.00%
Number of customers | Customers | 4 | 2
Bosch [Member] | Sales Revenue, Net [Member] |  |
Summary of Significant Accounting Policies (Textual) |  |
Concentration risk, percentage | 10.00% | 10.00%
Airbar Sales [Member] |  |
Summary of Significant Accounting Policies (Textual) |  |
Finished goods |  | $ 1,100,000
Research and development |  | 1,100,000
Cost of sales |  | $ 100,000
Revalue of purchase price | $ / shares |  | $ 0.12
Write off related product development units |  | $ 500,000
Hewlett Packard [Member] | Sales Revenue, Net [Member] |  |
Summary of Significant Accounting Policies (Textual) |  |
Concentration risk, percentage | 35.00% | 28.00%
Canon [Member] | Sales Revenue, Net [Member] |  |
Summary of Significant Accounting Policies (Textual) |  |
Concentration risk, percentage | 12.00% | 17.00%
Epson [Member] | Sales Revenue, Net [Member] |  |
Summary of Significant Accounting Policies (Textual) |  |
Concentration risk, percentage | 14.00% |
Minimum [Member] |  |
Summary of Significant Accounting Policies (Textual) |  |
Concentration risk, percentage | 20.00% |
Maximum [Member] |  |
Summary of Significant Accounting Policies (Textual) |  |
Concentration risk, percentage | 50.00% |

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