Discontinued Operation (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Summary of net revenues and income (loss) from the Company's discontinued operation
Net income (loss) from discontinued operation	$ 184	$ 1,839	$ (166)
Assets:
Total current assets of discontinued operation	88
Total noncurrent assets of discontinued operation	1,609	2,006
Liabilities:
Total current liabilities of discontinued operation	262	488
Total noncurrent liabilities of discontinued operation	3,804	4,633
MicroEdge
Summary of net revenues and income (loss) from the Company's discontinued operation
Income (loss) from operation of discontinued operation, net of applicable taxes	184	114	(166)
Income (loss) from discontinued operation, applicable taxes	126	(82)	(46)
Gain on disposal of discontinued operation, net of applicable taxes		1,725
Gain on disposal of discontinued operation, applicable taxes	0	1,279	0
Net income (loss) from discontinued operation	184	1,839	(166)
Assets:
Total current assets of discontinued operation	88
Deferred taxes, long-term	1,609	2,006
Total noncurrent assets of discontinued operation	1,609	2,006
Liabilities:
Total current liabilities of discontinued operation	262	488
Accrued restructuring, long-term portion	3,804	4,633
Total noncurrent liabilities of discontinued operation	$ 3,804	$ 4,633