The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Goodwill and Intangible Assets (Additional Information) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended									3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Sep. 30, 2014 Minimum [Member]	Aug. 15, 2014 Minimum [Member]	Oct. 31, 2014 Minimum [Member] Subsequent Event [Member]	Aug. 15, 2014 Opening Stock Price [Member]	Aug. 15, 2014 Closing Stock Price [Member]	Sep. 30, 2014 Weighted Average [Member]	Sep. 30, 2014 Maximum [Member]	Oct. 31, 2014 Maximum [Member] Subsequent Event [Member]	Sep. 30, 2014 Patents [Member]	Sep. 30, 2013 Patents [Member]	Sep. 30, 2014 Patents [Member]	Sep. 30, 2013 Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	$ 2,333	$ 860	$ 4,258	$ 2,538										$ 978	$ 860	$ 2,903	$ 2,538
Goodwill	65,757		65,757		65,757
Impairment of Intangible Assets, Finite-lived	$ 1,355		$ 1,355		$ 0
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount	14.00%		14.00%
Sale of Stock, Price Per Share	$ 0.95		$ 0.95			$ 0.95	$ 0.67	$ 0.72	$ 3.18	$ 0.88	$ 1.05	$ 1.40	$ 1.10