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Summary of Significant Accounting Policies (Details Textual)	12 Months Ended
	Dec. 31, 2017 USD ($) Customers	Dec. 31, 2016 USD ($) Customers	Dec. 31, 2015 USD ($)	Dec. 31, 2017 SEK	Dec. 31, 2017 TWD	Dec. 31, 2017 KPW	Dec. 31, 2017 JPY (¥)
Summary of Significant Accounting Policies (Textual)
Noncontrolling interest owned by Pronode Technologies AB	51.00%			51.00%	51.00%	51.00%	51.00%
Noncontrolling interest owned by Propoint AB	49.00%			49.00%	49.00%	49.00%	49.00%
Finished goods	$ 759,000	$ 132,000
Research and development	6,078,000	7,069,000	$ 6,279,000
Basic deposit coverage limits per owner and customer	100,000			SEK 100,000	TWD 3,000,000	KPW 50,000,000	¥ 10,000,000
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	84,000	74,000	62,000
Foreign currency translation adjustments	72,000	(217,000)	(103,000)
Cost of sales			165,000
Advertising costs	$ 602,000	299,000	$ 328,000
Noncontrolling interest, Description	Noncontrolling interests' partners have less than 50% share of voting rights at any one of the subsidiary level companies.
Future sales returns	$ 200,000
Investment in joint venture	$ 3,000	$ 3,000
Income tax, description	The one-time mandatory transition tax on accumulated foreign earnings and a reduction of the corporate income tax rate from 35% to 21% effective January 1, 2018, among other changes.
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%
Accounts Receivable [Member]
Summary of Significant Accounting Policies (Textual)
Concentration risk, percentage	69.00%	59.00%
Number of customers \| Customers	2	3
Sales Revenue, Net [Member]
Summary of Significant Accounting Policies (Textual)
Concentration risk, percentage	10.00%	10.00%	10.00%
Hewlett Packard [Member] \| Sales Revenue, Net [Member]
Summary of Significant Accounting Policies (Textual)
Concentration risk, percentage	28.00%	38.00%	25.00%
Canon [Member] \| Sales Revenue, Net [Member]
Summary of Significant Accounting Policies (Textual)
Concentration risk, percentage	17.00%
Bosch [Member] \| Sales Revenue, Net [Member]
Summary of Significant Accounting Policies (Textual)
Concentration risk, percentage	10.00%
Amazon Inc [Member] \| Sales Revenue, Net [Member]
Summary of Significant Accounting Policies (Textual)
Concentration risk, percentage		11.00%	14.00%
Autoliv [Member] \| Sales Revenue, Net [Member]
Summary of Significant Accounting Policies (Textual)
Concentration risk, percentage		11.00%	21.00%
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	0.12
Write off related product development units	500,000
United States [Member]
Summary of Significant Accounting Policies (Textual)
Net assets (liabilities)	2,373,000	$ 2,189,000
Europe [Member]
Summary of Significant Accounting Policies (Textual)
Net assets (liabilities)	5,418,000	1,872,000
Asia [Member]
Summary of Significant Accounting Policies (Textual)
Net assets (liabilities)	$ 72,000	$ 74,000