Fair Value Fair Value (Changes in Level 3 Liabilities) (Details) (Warrant [Member], USD $) In Thousands, unless otherwise specified					3 Months Ended
	Mar. 31, 2014 Fair Value, Inputs, Level 3 [Member]	Dec. 31, 2013 Fair Value, Inputs, Level 3 [Member]	Mar. 31, 2013 Fair Value, Inputs, Level 3 [Member]	Dec. 31, 2012 Fair Value, Inputs, Level 3 [Member]	Mar. 31, 2014 Changes Measurement [Member]	Mar. 31, 2013 Changes Measurement [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance at January 1	$ 14	$ 14	$ 206	$ 295
Fair value adjustment at March 31					0	(89)
Balance at March 31	$ 14	$ 14	$ 206	$ 295