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Note 6 - Stockholder's Equity (Details) - Valuation Assumptions, Stock Options
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12 Months Ended | |
|---|---|---|
|
Dec. 31, 2012
|
Dec. 31, 2011
|
|
| Note 6 - Stockholder's Equity (Details) - Valuation Assumptions, Stock Options [Line Items] | ||
| Risk-free interest rate | 0.30% | |
|
Employee Stock Option [Member]
|
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| Note 6 - Stockholder's Equity (Details) - Valuation Assumptions, Stock Options [Line Items] | ||
| Expected term (years) | 4 years 36 days | 4 years 36 days |
| Expected volatility | 53.40% | 52.90% |
| Risk-free interest rate | 0.60% | 1.10% |