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Stock Warrants and Options - Summary of Current Warrant Activity (Details) (USD $)
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9 Months Ended | 12 Months Ended |
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Sep. 30, 2013
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Dec. 31, 2012
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| Notes to Financial Statements | ||
| Beginning Balance, number of shares | 1,330,953 | 2,017,382 |
| Beginning Balance, weighted average exercise price | $ 0.45 | $ 0.43 |
| Warrants expired, number of shares | (714,286) | (686,429) |
| Warrants expired, weighted average exercise price | $ 0.40 | $ 0.40 |
| Ending Balance, number of shares | 616,667 | 1,330,953 |
| Ending Balance, weighted average exercise price | $ 0.51 | $ 0.45 |
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