Stock-Based Compensation (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013
Stock Based Compensation [Line Items]
Outstanding, Number of Shares	3,291,738
Granted, Number of Shares	225,000
Exercised, Number of Shares	0
Forfeited or expired, Number of Shares	(62,500)
Outstanding, Number of Shares	3,454,238	3,291,738
Exercisable, Number of Shares	3,024,237
Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 2.11
Granted, Weighted Average Exercise Price (in dollars per share)	$ 1.21
Exercised, Weighted Average Exercise Price (in dollars per share)	$ 0
Forfeited or expired, Weighted Average Exercise Price (in dollars per share)	$ 2.25
Outstanding, Weighted Average Exercise Price (in dollars per share)	$ 2.05	$ 2.11
Exercisable, Weighted Average Exercise Price (in dollars per share)	$ 2.12
Outstanding, Weighted Average Remaining Contractual Life (in years)	5 years 11 months 26 days	6 years 1 month 17 days
Exercisable, Weighted Average Remaining Contractual Life (in years)	5 years 6 months 11 days
Outstanding, Aggregate Intrinsic Value	$ 738
Granted, Aggregate Intrinsic Value	0
Exercised, Aggregate Intrinsic Value	0
Forfeited or expired, Aggregate Intrinsic Value	0
Outstanding, Aggregate Intrinsic Value	258	738
Exercisable, Aggregate Intrinsic Value	$ 258