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Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended												12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Summary of net revenues by geographic region
Net revenues	$ 1,735us-gaap_Revenues	$ 1,126us-gaap_Revenues	$ 865us-gaap_Revenues	$ 1,014us-gaap_Revenues	$ 1,009us-gaap_Revenues	$ 1,076us-gaap_Revenues	$ 1,084us-gaap_Revenues	$ 548us-gaap_Revenues	$ 2,320us-gaap_Revenues	$ 1,679us-gaap_Revenues	$ 1,974us-gaap_Revenues	$ 1,164us-gaap_Revenues	$ 4,740us-gaap_Revenues	$ 3,717us-gaap_Revenues	$ 7,137us-gaap_Revenues
Revenues percentage													100.00%neond_RevenuePercentageNet	100.00%neond_RevenuePercentageNet	100.00%neond_RevenuePercentageNet
U.S. [Member]
Summary of net revenues by geographic region
Net revenues													2,833	1,896	5,178
Revenues percentage													60.00%	51.00%	73.00%
Europe [Member]
Summary of net revenues by geographic region
Net revenues													228	308	153
Revenues percentage													5.00%	9.00%	2.00%
Asia [Member]
Summary of net revenues by geographic region
Net revenues													$ 1,679	$ 1,513	$ 1,806
Revenues percentage													35.00%	40.00%	25.00%