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Summary of Significant Accounting Policies (Details Textual) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012 Country	Dec. 31, 2011	Dec. 31, 2010
Summary of Significant Accounting Policies (Textual) [Abstract]
Percentage of stock acquired by the Company	100.00%
Number of Countries in which Entity Operates	14
Losses resulting from foreign currency transactions	$ 410	$ 760	$ 225
Percent of renewals within median VSOE range	80.00%
Range within median renewal percentage rate	15.00%
Software development costs were capitalized	0	0	0
Impairment charge, Goodwill		2,873
Impairment charge, intangibles		2,307
Maximum [Member]
Cash and Cash Equivalents [Line Items]
Estimated useful lives of assets	7 years
Product warranty period	2 years
Extended product warranty period	4 years
Minimum [Member]
Cash and Cash Equivalents [Line Items]
Estimated useful lives of assets	3 years
Product warranty period	1 year
Extended product warranty period	1 year
Software Development Costs [Member] | Maximum [Member]
Cash and Cash Equivalents [Line Items]
Estimated economic life of product	5 years
Software Development Costs [Member] | Minimum [Member]
Cash and Cash Equivalents [Line Items]
Estimated economic life of product	2 years
Patents [Member]
Cash and Cash Equivalents [Line Items]
Estimated useful lives of assets	20 years
Cash and Cash Equivalents [Member]
Cash and Cash Equivalents [Line Items]
Fair value of cash and cash Equivalents in money market funds or demand bank deposits	106,436
Cash and Cash Equivalents [Member] | Bank Time Deposits [Member]
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents in bank time deposits	33
Fair value of cash and cash equivalents in bank time deposits	$ 33

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Percentage of voting equity interests acquired in the business combination.

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