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Business Combination Cameleon (Details) $ in Thousands		3 Months Ended			6 Months Ended		12 Months Ended
	Jan. 08, 2014 USD ($) € / shares	Jun. 30, 2015 USD ($)	Dec. 31, 2014 USD ($)	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)
Business Acquisition [Line Items]
Business Combination, Acquisition Related Costs		$ 0		$ 579	$ 0	$ 1,969
Premium to be paid per share | € / shares	€ 0.15
Business combination, payment of contingent consideration			$ (2,225)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Goodwill		20,614	$ 21,563		20,614		$ 21,563
Business Acquisition, Goodwill, Expected Tax Deductible Amount		$ 5,800			$ 5,800
Cameleon Acquisition [Member]
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired	81.70%
Percentage owned of outstanding warrants	94.00%
Noncontrolling interest percentage at the end of the period					100.00%
Business Combination, Consideration Transferred					$ 32,000
Business Combination, Acquisition Related Costs				$ 300	$ 0	$ 1,000
Percentage ownership that triggers premium payment							95.00%
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents	€ 7,086
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables	10,395
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets	1,418
Finite-lived Intangible Assets Acquired	18,653
Goodwill	15,717
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities	(12,539)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Revenue	(5,392)
Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value	(6,204)
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	29,134
Premium on shares [Member]
Business Acquisition [Line Items]
Business Combination, Contingent Consideration, Liability	2,700
Free shares [Member]
Business Acquisition [Line Items]
Business Combination, Contingent Consideration, Liability	€ 1,400

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