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Stock-Based Compensation (Narrative) (Details) (USD $)
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3 Months Ended | 6 Months Ended | 12 Months Ended | 141 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | 3 Months Ended | 6 Months Ended | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Jun. 30, 2012
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Jun. 30, 2011
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Jun. 30, 2012
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Jun. 30, 2011
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Dec. 31, 2011
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Dec. 31, 2012
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Jun. 02, 2006
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Jun. 30, 2012
First Anniversary [Member]
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Jun. 30, 2012
Second Anniversary [Member]
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Jun. 30, 2012
Third Anniversary [Member]
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Jun. 30, 2012
Maximum [Member]
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Jun. 30, 2012
Minimum [Member]
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Jun. 30, 2012
Exercise Price $0.38 [Member]
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Jun. 30, 2012
Exercise Price $0.48 [Member]
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Jun. 30, 2011
Exercise Price $1.84 [Member]
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Jun. 30, 2011
Exercise Price $1.25 [Member]
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Jun. 30, 2011
Exercise Price $1.22 [Member]
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Jun. 30, 2012
Employee Transaction [Member]
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Jun. 30, 2011
Employee Transaction [Member]
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Jun. 30, 2012
Employee Transaction [Member]
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Jun. 30, 2011
Employee Transaction [Member]
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Jun. 30, 2012
Non-Employee Transaction [Member]
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Mar. 31, 2011
Non-Employee Transaction [Member]
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Jun. 30, 2012
Non-Employee Transaction [Member]
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Jun. 30, 2011
Non-Employee Transaction [Member]
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| Vesting percentage | 30.00% | 30.00% | 40.00% | ||||||||||||||||||||||
| Expiration of options from grant date, years | 10 years | 5 years | |||||||||||||||||||||||
| Non-employee vesting period | 3 years | 1 year | |||||||||||||||||||||||
| Options authorized for issuance | 8,478,000 | 8,478,000 | 17,000,000 | ||||||||||||||||||||||
| Share-based employee compensation expense | $ 50,752 | $ 170,178 | $ 141,926 | $ 372,167 | $ 5,719,555 | $ 55,317 | $ 154,618 | $ 115,132 | $ 304,864 | ||||||||||||||||
| Valuation allowance on deferred tax assets | 100.00% | ||||||||||||||||||||||||
| Stock compensation expense for non-employee options | (4,565) | 15,560 | 26,794 | 67,303 | |||||||||||||||||||||
| Stock options granted | 245,000 | 250,000 | 170,000 | 75,000 | 130,000 | 100,000 | 20,000 | ||||||||||||||||||
| Stock option exercise price | $ 0.41 | $ 1.55 | $ 0.38 | $ 0.48 | $ 1.84 | $ 1.25 | $ 1.22 | ||||||||||||||||||
| Stock option grants fair value | 47,589 | 26,835 | 180,326 | 91,334 | 17,915 | ||||||||||||||||||||
| Intrinsic value of options exercised | 94,250 | ||||||||||||||||||||||||
| Weighted average fair value of options exercised | $ 0.93 | $ 0.84 | $ 0.93 | $ 0.84 | |||||||||||||||||||||
| Unrecognized compensation cost | $ 294,097 | $ 294,097 | $ 397,593 | ||||||||||||||||||||||
| Weighted average vesting period, years | 1 year 6 months 26 days | 1 year 7 months 3 days | |||||||||||||||||||||||