Segment Customer Concentration and Geographical Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Revenues generated by each business unit
Revenues	$ 10,171	$ 16,105	$ 20,285	$ 33,896
Wireless Business Segment [Member]
Revenues generated by each business unit
Revenues	8,731	13,808	17,306	29,789
Productivity & Graphics [Member]
Revenues generated by each business unit
Revenues	1,395	2,232	2,870	3,974
Corporate/Other [Member]
Revenues generated by each business unit
Revenues	$ 45	$ 65	$ 109	$ 133