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Income Taxes (Details Textual) (USD $) In Millions, unless otherwise specified | Dec. 31, 2013
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Operating Loss Carryforwards [Line Items] |
Tax benefits expired | $ 28.3
Unrecognized tax benefits that would impact effective tax rate | 2.0
Federal [Member] |
Operating Loss Carryforwards [Line Items] |
Net operating loss carryforwards that will expire due to IRC Section 382 limitations | 122.4
California [Member] |
Operating Loss Carryforwards [Line Items] |
Net operating loss carryforwards that will expire due to IRC Section 382 limitations | 38.9
Pennsylvania [Member] |
Operating Loss Carryforwards [Line Items] |
Net operating loss carryforwards that will expire due to IRC Section 382 limitations | 75.6
Research Tax Credit Carryforward [Member] | Federal [Member] |
Operating Loss Carryforwards [Line Items] |
Tax credit carryforward amount | 2.0
Research Tax Credit Carryforward [Member] | State [Member] |
Operating Loss Carryforwards [Line Items] |
Tax credit carryforward amount | $ 2.1

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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 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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Carryforwards -URI http://asc.fasb.org/extlink&oid=6506874 + 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 + Details
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