Business Segment and Geographic Data, Revenue by Geographical Data (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Net revenues by geographic area [Abstract]
Revenues		$ 19,924	$ 31,799	$ 40,598	$ 75,813
Long-lived assets by geographic area [Abstract]
Long-lived assets		1,306		1,306		$ 1,412
Reportable Geographical Components [Member] | North America [Member]
Net revenues by geographic area [Abstract]
Revenues	[1]	13,506	23,055	28,725	58,520
Long-lived assets by geographic area [Abstract]
Long-lived assets		204		204		265
Reportable Geographical Components [Member] | Asia Pacific [Member]
Net revenues by geographic area [Abstract]
Revenues	[2]	1,579	1,750	2,256	2,770
Long-lived assets by geographic area [Abstract]
Long-lived assets		29		29		16
Reportable Geographical Components [Member] | Europe (Including Israel) [Member]
Net revenues by geographic area [Abstract]
Revenues		4,760	6,399	9,423	13,618
Long-lived assets by geographic area [Abstract]
Long-lived assets		1,070		1,070		1,127
Reportable Geographical Components [Member] | South America [Member]
Net revenues by geographic area [Abstract]
Revenues		79	595	194	905
Long-lived assets by geographic area [Abstract]
Long-lived assets		3		3		$ 4
Reportable Geographical Components [Member] | United States [Member]
Net revenues by geographic area [Abstract]
Revenues		11,995	19,864	25,126	50,123
Reportable Geographical Components [Member] | Canada [Member]
Net revenues by geographic area [Abstract]
Revenues		1,511	3,191	3,573	8,397
Reportable Geographical Components [Member] | Japan [Member]
Net revenues by geographic area [Abstract]
Revenues		$ 104	$ 132	$ 195	$ 319

[1] United States $11,995 $19,864 $25,126 $50,123 Canada $1,511 $3,191 $3,573 $8,397.

[2] Japan $104 $132 $195 $319