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Income Taxes (Details 1) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011
--- | --- | ---
Current deferred tax assets: |  |
Vacation accrual | $ 26 | $ 21
Total current deferred tax assets | 26 | 21
Valuation allowance | (26) | (21)
Net current deferred tax assets |  |
Noncurrent deferred tax assets: |  |
Net operating loss carryforwards | 37,295 | 35,751
Charitable contribution carryforwards | 368 | 406
Research and experimentation credits | 687 | 687
Capitalized intangibles | 3,413 | 3,432
Stock based compensation | 416 | 399
Depreciation and amortization | 11 | 23
Other | 25 | 76
Total noncurrent deferred tax assets | 42,215 | 40,774
Valuation allowance | (42,215) | (40,774)
Net noncurrent deferred tax assets |  |
Deferred tax liabilities: |  |
Current deferred tax liabilities |  |
Noncurrent deferred tax liabilities |  |
Net deferred tax liabilities |  |
Net noncurrent deferred tax assets |  |

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- Definition Amount of deferred tax liability attributable to taxable temporary differences, net of deferred tax asset attributable to deductible temporary differences and carryforwards net of valuation allowances expected to be realized or consumed after one year (or the normal operating cycle, if longer). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 41, 42 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=21917399&loc=d3e31917-109318 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=21917399&loc=d3e31931-109318 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=21917399&loc=d3e31958-109318 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant