Income Taxes (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended			12 Months Ended
Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014 Unrestricted [Member]	Mar. 31, 2014 Restricted [Member]	Dec. 31, 2008 Operating Loss Carryforwards Per Annum Until 2008 [Member]	Dec. 31, 2009 Operating Loss Carryforwards Per Year After 2008 [Member]
Operating loss carryforwards	$ 74,422		$ 59,560	$ 14,862	$ 2,500	$ 1,700
Tax Credit Carryforward, Amount	$ 547
Operating Loss Carryforwards, Expiration Date	Substantially all of the net operating loss carry forwards and unused minimum tax credit carry forwards expire between 2024 and 2034
Operating Loss Carryforwards, Limitations on Use	The Company’s utilization of restricted net operating tax loss carry forwards against future income for tax purposes is restricted pursuant to the “change in ownership” rules in Section 382 of the Internal Revenue Code. These rules, in general, provide that an ownership change occurs when the percentage shareholdings of 5% direct or indirect stockholders of a loss corporation have, in aggregate, increased by more than 50 percentage points during the immediately preceding three years.	The Company’s utilization of restricted net operating tax loss carry forwards against future income for tax purposes is restricted pursuant to the “change in ownership” rules in Section 382 of the Internal Revenue Code. These rules, in general, provide that an ownership change occurs when the percentage shareholdings of 5% direct or indirect stockholders of a loss corporation have, in aggregate, increased by more than 50 percentage points during the immediately preceding three years.				The Company’s utilization of restricted net operating tax loss carry forwards against future income for tax purposes is restricted pursuant to the “change in ownership” rules in Section 382 of the Internal Revenue Code. These rules, in general, provide that an ownership change occurs when the percentage shareholdings of 5% direct or indirect stockholders of a loss corporation have, in aggregate, increased by more than 50 percentage points during the immediately preceding three years.

Income Taxes (Narrative) (Details) (USD $)
In Thousands, unless otherwise specified

3 Months Ended

12 Months Ended

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Unrestricted [Member]

Mar. 31, 2014

Restricted [Member]

Dec. 31, 2008

Operating Loss Carryforwards Per Annum Until 2008 [Member]

Dec. 31, 2009

Operating Loss Carryforwards Per Year After 2008 [Member]

Operating loss carryforwards

$ 74,422

$ 59,560

$ 14,862

$ 2,500

$ 1,700

Tax Credit Carryforward, Amount

$ 547

Operating Loss Carryforwards, Expiration Date

Substantially all of the net operating loss carry forwards and unused minimum tax credit carry forwards expire between 2024 and 2034

Operating Loss Carryforwards, Limitations on Use

The Company’s utilization of restricted net operating tax loss carry forwards against future income for tax purposes is restricted pursuant to the “change in ownership” rules in Section 382 of the Internal Revenue Code. These rules, in general, provide that an ownership change occurs when the percentage shareholdings of 5% direct or indirect stockholders of a loss corporation have, in aggregate, increased by more than 50 percentage points during the immediately preceding three years.