Fair Value Measurement (Cash and Cash Equivalents) (Details) (Money Market Funds [Member], Fair Value, Inputs, Level 1 [Member], USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash Equivalents, Beginning Balance	$ 2,807	$ 10,606
Cash Equivalents, Ending Balance	2,807	10,606
Cost [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash Equivalents, Beginning Balance	2,807	10,606
Cash Equivalents, Ending Balance	$ 2,807	$ 10,606