Significant Accounting Policies (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Significant Accounting Policies (Textual) [Abstract]
Maximum maturity period for classification of investments as cash equivalents	3 months
Investments other-than-temporary losses	$ 0	$ 0
Contractual maturities accounts receivable	less than one year
Contract loss provisions recorded	$ 0	$ 0
Term of agreement for revenue recognition	2 years
Term for post-contract technical support	1 year
Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives of amortizable intangibles	7 years
Estimated life of intangible assets	15 years
Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful lives of amortizable intangibles	3 years
Estimated life of intangible assets	3 years
Software Development [Member]
Property, Plant and Equipment [Line Items]
Estimated life of intangible assets	3 years