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Summary of Significant Accounting Policies (Details Textual) $ in Thousands	3 Months Ended					12 Months Ended
	Mar. 31, 2019 USD ($) Customers	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2018 USD ($) Customers
Summary of Significant Accounting Policies (Textual)
Basic deposit coverage limits per owner and customer	$ 250
Allowance for doubtful accounts		$ 149				$ 149
Costs capitalized in projects in process	8
Foreign currency translation adjustments	(181)	60	$ 13	$ (336)	$ (94)
Foreign currency transactions, general and administrative expenses	171				29
Investment in joint venture	$ 3	3				3
Equity ownership percentage	50.00%
Advertising costs	$ 19				$ 43
Noncontrolling interest, description	We consolidate subsidiaries in which we hold, directly or indirectly, more than 50% of the voting rights, and variable interest entities (“VIEs”) in which Neonode is the primary beneficiary.
Additional leased assets and lease liabilities		$ 1,000				$ 1,000
Corporate income tax rate, description	The corporate income tax rate from 35% to 21% effective January 1, 2018, among other changes.
Revenues related to contract liabilities outstanding	$ 35,000
Accounts Receivable [Member]
Summary of Significant Accounting Policies (Textual)
Number of customer \| Customers	3					4
Concentration risk, percentage	61.00%					67.00%
Sales Revenue, Net [Member]
Summary of Significant Accounting Policies (Textual)
Concentration risk, percentage	10.00%				10.00%
Sales Revenue, Net [Member] \| Hewlett Packard [Member]
Summary of Significant Accounting Policies (Textual)
Concentration risk, percentage	38.00%				38.00%
Sales Revenue, Net [Member] \| Epson [Member]
Summary of Significant Accounting Policies (Textual)
Concentration risk, percentage	17.00%				14.00%
Sales Revenue, Net [Member] \| Canon [Member]
Summary of Significant Accounting Policies (Textual)
Concentration risk, percentage					13.00%
Sales Revenue, Net [Member] \| Alpine [Member]
Summary of Significant Accounting Policies (Textual)
Concentration risk, percentage	12.00%
Maximum [Member]
Summary of Significant Accounting Policies (Textual)
Equity ownership percentage	50.00%
Warrant term	36 months
Minimum [Member]
Summary of Significant Accounting Policies (Textual)
Equity ownership percentage	20.00%
Warrant term	12 months
SWEDEN
Summary of Significant Accounting Policies (Textual)
Noncontrolling interest owned by Pronode Technologies AB	51.00%
Noncontrolling interest owned by Propoint AB	49.00%
SWEDEN \| Euro [Member]
Summary of Significant Accounting Policies (Textual)
Basic deposit coverage limits per owner and customer	$ 100,000
SWEDEN \| Yen [Member]
Summary of Significant Accounting Policies (Textual)
Basic deposit coverage limits per owner and customer	1,900,000
KOREA, REPUBLIC OF \| Won [Member]
Summary of Significant Accounting Policies (Textual)
Basic deposit coverage limits per owner and customer	50,000,000
Taiwan [Member] \| Taiwan, New Dollars
Summary of Significant Accounting Policies (Textual)
Basic deposit coverage limits per owner and customer	$ 3,000,000