Income Taxes (Details Textual) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Tax Credit Carryforward [Line Items]
Income Taxes Paid, Net	$ 100,000	$ 0	$ 100,000
Operating Loss Carryforwards	35,500,000	49,900,000	280,600,000
Operating Loss Carryforwards, Used	13,000,000
Operating Loss Carryforwards, Built-in Losses		1,400,000
Operating Loss Carryforwards, Share Based Compensation	1,800,000
Research Tax Credit Carryforward [Member]
Tax Credit Carryforward [Line Items]
Research and development credit carryforward	800,000	200,000
California [Member]
Tax Credit Carryforward [Line Items]
State operating loss carryforwards	36,900,000	38,900,000	76,200,000
State operating loss carryforwards, Utilized	$ 2,000,000