Income Taxes (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013 Internal Revenue Service (IRS) [Member]	Dec. 31, 2013 State and Local Jurisdiction [Member]
Income tax expense	$ 5,000	$ 4,000
Operating loss carryforwards, subject to expiration			$ 140,000,000	$ 127,200,000