Income Taxes (Tables)

12 Months Ended

Dec. 31, 2012

Components of Net Deferred Tax Assets

The components of the net deferred tax assets are as follows at December 31:

	2012			2011
	(in thousands)
Operating loss carryforwards	$	21,753		$	19,119
Tax credit carryforwards		317			330
Other temporary differences		2,921			2,070
		24,991			21,519
Less valuation allowance		(24,991	)		(21,519	)
Net deferred tax asset	$	—		$	—

Primary Factors Affecting Income Tax Rates

The primary factors affecting the Company’s income tax rates were as follows:

	2012			2011
Tax benefit at U.S. statutory rates		(34	%)		(34	%)
State tax benefit		(5.3	%)		(5.3	%)
Credit		(0.2	%)		(1.0	%)
Permanent differences		1.4	%		3.5	%
Expiring state NOL’s		3.3	%		3.4	%
Changes in valuation allowance		34.8	%		33.4	%
		0	%		0	%