Business Segment and Geographic Data, Revenue by Geographical Data (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014		Dec. 31, 2014
Net revenues by geographic area [Abstract]
Revenues	$ 28,149		$ 50,075
Long-lived assets by geographic area [Abstract]
Long-lived assets	14,547				13,802
Reportable Geographical Components [Member] | North America [Member]
Net revenues by geographic area [Abstract]
Revenues	20,764	[1]	39,972	[1]
Long-lived assets by geographic area [Abstract]
Long-lived assets	13,169				12,385
Reportable Geographical Components [Member] | Asia Pacific [Member]
Net revenues by geographic area [Abstract]
Revenues	2,371	[2]	2,377	[2]
Long-lived assets by geographic area [Abstract]
Long-lived assets	310				286
Reportable Geographical Components [Member] | Europe (Including Israel) [Member]
Net revenues by geographic area [Abstract]
Revenues	4,899		7,408
Long-lived assets by geographic area [Abstract]
Long-lived assets	1,065				1,127
Reportable Geographical Components [Member] | South America [Member]
Net revenues by geographic area [Abstract]
Revenues	115		318
Long-lived assets by geographic area [Abstract]
Long-lived assets	3				4
Reportable Geographical Components [Member] | United States [Member]
Net revenues by geographic area [Abstract]
Revenues	18,678		34,766
Reportable Geographical Components [Member] | Canada [Member]
Net revenues by geographic area [Abstract]
Revenues	2,062		5,206
Reportable Geographical Components [Member] | Japan [Member]
Net revenues by geographic area [Abstract]
Revenues	$ 91		$ 698

[1] United States $18,678 $34,766 Canada $2,062 $5,206

[2] Japan $91 $698