Income Taxes (Tables)

12 Months Ended

Dec. 31, 2013

Income Tax Disclosure [Abstract]

Deferred Tax Assets

The components of the Company’s deferred tax assets at December 31, 2013 and 2012 are as follows: (Amounts in thousands):

	Years ended December 31,
	2013			2012
Net operating loss carryforwards	$	74,533		$	72,072
Research and development credits		2,171			1,978
Stock based compensation		434			263
Capital loss carryforwards		1,360			1,593
Accruals and reserves		83			33
Total Deferred tax assets		78,581			75,939
Valuation allowance		(78,581	)		(75,939	)
Net deferred tax asset	$	—		$	—

Reconciliation of the Federal Statutory Rate to the Company's Effective Tax Rate

A reconciliation of the federal statutory rate to the Company’s effective tax rate is as follows:

	Years ended December 31,
	2013			2012
Federal Statutory Rate		34.00	%		34.00	%
State Income taxes		0.31			1.46
Warrants		0.00			0.02
Federal NOL adjustment		(0.48	)		(0.01	)
State NOL expired or adjusted		—			(29.83	)
Permanent Items: Capital Loss		—			—
Permanent Items		0.16			(1.03	)
Stock Compensation		(0.31	)		(0.54	)
Federal Research Credits		1.64			(7.01	)
State rate change		(3.38	)		—
Miscellaneous		(0.03	)		0.51
(Increase)/ Decrease In Valuation Allowance		(31.91	)		2.43
Provision for income taxes		0.00	%		0.00	%

Changes in Unrecognized Tax Benefits

The change in unrecognized tax benefits from December 31, 2011 is as follows:

Unrecognized tax benefits as of 12/31/11	$	—
Increase in prior year unrecognized tax benefits		654,701
Increase in current year unrecognized tax benefits		19,179
Unrecognized tax benefits as of 12/31/12		673,880
Increase in prior year unrecognized tax benefits		40,472
Increase in current year unrecognized tax benefits		33,684
Unrecognized tax benefits as of 12/31/13	$	748,036