Summary of Significant Accounting Policies (Details Textual)	12 Months Ended
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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Amount of deferred revenues as of balance sheet date. Deferred revenue represents collections of cash or other assets related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP.

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