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Summary of Significant Accounting Policies (Details) (USD $) | 12 Months Ended | 197 Months Ended
--- | --- | ---
Dec. 31, 2012 segment area | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2012 area
Segments |  |  |  |
Number of operating segments | 1 |  |  |
Number of geographic areas for development operations | 2 |  |  | 2
Property, plant and equipment |  |  |  |
Fixed assets sold |  | $ 6,000 | $ 28,000 |
Proceeds from sale of property, plant and equipment | $ 62,000 | $ 5,000 | $ 41,000 | $ 225,000
Property, plant and equipment | Minimum |  |  |  |
Property, plant and equipment |  |  |  |
Estimated useful life | 3 years |  |  |
Property, plant and equipment | Maximum |  |  |  |
Property, plant and equipment |  |  |  |
Estimated useful life | 5 years |  |  |
Leasehold improvements | Minimum |  |  |  |
Property, plant and equipment |  |  |  |
Estimated useful life | 5 years |  |  |
Leasehold improvements | Maximum |  |  |  |
Property, plant and equipment |  |  |  |
Estimated useful life | 15 years |  |  |

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- Definition Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues. + References No definition available. + Details
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- Definition The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 16 -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 15 -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 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3179-108585 + Details
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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
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