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Income Taxes (Details Textual) (USD $) | Dec. 31, 2012
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Operating Loss Carryforwards [Line Items] |
Tax benefits expired | $ 30,500,000
Unrecognized tax benefits that would impact effective tax rate | 1,500,000
Federal [Member] |
Operating Loss Carryforwards [Line Items] |
Net operating loss carryforwards that will expire due to IRC Section 382 limitations | 108,000,000
California [Member] |
Operating Loss Carryforwards [Line Items] |
Net operating loss carryforwards that will expire due to IRC Section 382 limitations | 37,400,000
Pennsylvania [Member] |
Operating Loss Carryforwards [Line Items] |
Net operating loss carryforwards that will expire due to IRC Section 382 limitations | 61,000,000
Research Tax Credit Carryforward [Member] | Federal [Member] |
Operating Loss Carryforwards [Line Items] |
Tax credit carryforward amount | 863,000
Research Tax Credit Carryforward [Member] | State [Member] |
Operating Loss Carryforwards [Line Items] |
Tax credit carryforward amount | $ 1,900,000

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- Definition The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 17 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Carryforwards -URI http://asc.fasb.org/extlink&oid=6506874 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 48 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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