Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Components Of Income Tax Expense Benefit [Line Items]
Computed "expected" tax benefit - Federal	$ (4,188)	$ (5,803)
Computed "expected" tax benefit - State	(488)	(676)
Meals, entertainment and other	6	5
Non-deductible stock-based compensation	511	518
Realized loss on debt securities	0	0
Change in valuation allowance	4,159	5,956
Income tax expense	$ 0	$ 0