Equity-Based Compensation (Exercise Price Range) (Details) (Stock Options [Member], USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of Options, Outstanding (in shares)	1,350	1,792	1,857
Weighted Average Remaining Contractual Life (In Years)	7 years 4 months 10 days
Weighted Average Exercise Price, Outstanding (in dollars per share)	$ 2.02	$ 2.21	$ 3.07
Number of Options, Exercisable (in shares)	729	410	605
Weighted Average Exercise Price, Exercisable (in dollars per share)	$ 2.05	$ 2.71	$ 2.93
Exercise Price Range 1 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower range limit	$ 0.90
Exercise price range, upper range limit	$ 1.51
Number of Options, Outstanding (in shares)	175
Weighted Average Remaining Contractual Life (In Years)	7 years 8 months 1 day
Weighted Average Exercise Price, Outstanding (in dollars per share)	$ 1.29
Number of Options, Exercisable (in shares)	85
Weighted Average Exercise Price, Exercisable (in dollars per share)	$ 1.29
Exercise Price Range 2 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower range limit	$ 1.52
Exercise price range, upper range limit	$ 1.96
Number of Options, Outstanding (in shares)	70
Weighted Average Remaining Contractual Life (In Years)	3 years 2 months 23 days
Weighted Average Exercise Price, Outstanding (in dollars per share)	$ 1.71
Number of Options, Exercisable (in shares)	70
Weighted Average Exercise Price, Exercisable (in dollars per share)	$ 1.71
Exercise Price Range 3 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower range limit	$ 1.98
Exercise price range, upper range limit	$ 2.05
Number of Options, Outstanding (in shares)	892
Weighted Average Remaining Contractual Life (In Years)	7 years 11 months 16 days
Weighted Average Exercise Price, Outstanding (in dollars per share)	$ 1.98
Number of Options, Exercisable (in shares)	438
Weighted Average Exercise Price, Exercisable (in dollars per share)	$ 1.98
Exercise Price Range 4 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower range limit	$ 2.12
Exercise price range, upper range limit	$ 2.60
Number of Options, Outstanding (in shares)	97
Weighted Average Remaining Contractual Life (In Years)	5 years 6 months
Weighted Average Exercise Price, Outstanding (in dollars per share)	$ 2.34
Number of Options, Exercisable (in shares)	70
Weighted Average Exercise Price, Exercisable (in dollars per share)	$ 2.35
Exercise Price Range 5 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower range limit	$ 2.68
Exercise price range, upper range limit	$ 7.68
Number of Options, Outstanding (in shares)	116
Weighted Average Remaining Contractual Life (In Years)	6 years 3 months 25 days
Weighted Average Exercise Price, Outstanding (in dollars per share)	$ 3.29
Number of Options, Exercisable (in shares)	66
Weighted Average Exercise Price, Exercisable (in dollars per share)	$ 3.50