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Note 7 - Convertible Notes Payable (Detail) (USD $)
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1 Months Ended | 3 Months Ended | 6 Months Ended | 4 Months Ended | 6 Months Ended | 1 Months Ended | 4 Months Ended | 1 Months Ended | 4 Months Ended | 1 Months Ended | 1 Months Ended | 4 Months Ended | 1 Months Ended | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Jul. 31, 2012
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Feb. 29, 2012
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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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Feb. 27, 2012
Warrant [Member]
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Jun. 30, 2012
Warrant [Member]
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Feb. 29, 2012
Unamortized Discount [Member]
The 2010 Unsecured Convertible Notes Payable [Member]
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Feb. 27, 2012
Unamortized Discount [Member]
The 2011 Unit Offering Note [Member]
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Feb. 29, 2012
Umamortized Deferred Offering Costs [Member]
The 2010 Unsecured Convertible Notes Payable [Member]
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Feb. 27, 2012
Umamortized Deferred Offering Costs [Member]
The 2011 Unit Offering Note [Member]
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Feb. 29, 2012
The 2010 Unsecured Convertible Notes Payable [Member]
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Dec. 31, 2011
The 2010 Unsecured Convertible Notes Payable [Member]
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Mar. 31, 2010
The 2010 Unsecured Convertible Notes Payable [Member]
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Oct. 31, 2011
2011 Unit Offering Notes [Member]
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Oct. 31, 2011
The 2011 Unit Offering Note [Member]
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Feb. 27, 2012
The 2011 Unit Offering Note [Member]
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Feb. 27, 2012
The 2011 Unit Offering Note [Member]
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Sep. 30, 2011
The 2011 Junior Secured Convertible Note [Member]
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Apr. 30, 2011
The 2011 Junior Secured Convertible Note [Member]
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Jul. 27, 2012
The 2011 Junior Secured Convertible Note [Member]
|
Feb. 27, 2012
The 2011 Junior Secured Convertible Note [Member]
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| Debt Instrument, Interest Rate, Stated Percentage | 10.00% | 10.00% | 10.00% | |||||||||||||||||||||
| Debt Instrument, Face Amount (in Dollars) | $ 4,071,000 | $ 100,000 | $ 2,000,000 | |||||||||||||||||||||
| Debt Instrument, Convertible, Conversion Price (in Dollars per share) | $ 1.00 | $ 8.00 | $ 0.60 | $ 0.60 | ||||||||||||||||||||
| Conversion Price As Percentage of Public Offering Price | 80.00% | |||||||||||||||||||||||
| Minimum Conversion Price Per Share (in Dollars per share) | $ 4.00 | $ 0.60 | $ 0.60 | |||||||||||||||||||||
| Debt Conversion, Original Debt, Amount (in Dollars) | 10,811,500 | 4,868,017 | 5,491,929 | |||||||||||||||||||||
| Debt Conversion, Converted Instrument, Shares Issued (in Shares) | 4,868,041 | 9,153,248 | ||||||||||||||||||||||
| Interest Expense (in Dollars) | 96,018 | 598,450 | 2,421,754 | 1,140,325 | 13,500 | 1,063,018 | 13,883 | 785,239 | ||||||||||||||||
| Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in Shares) | 50,000 | |||||||||||||||||||||||
| Debt Instrument, Maturity | 3 years | |||||||||||||||||||||||
| Term of Warrants | 5 years | 5 years | ||||||||||||||||||||||
| Warrants Issued During Period, Weighted Average Exercise Price (in Dollars per share) | $ 1.45 | $ 0.80 | $ 0.75 | |||||||||||||||||||||
| Number of Unit Offering Notes Sold | 38.055 | 54.305 | ||||||||||||||||||||||
| Aggregate Principal Amount of Unit Offering Notes Sold (in Dollars) | 5,430,500 | |||||||||||||||||||||||
| Warrants Issued During Period (in Shares) | 2,700,000 | 4,335,704 | 941,288 | 2,715,250 | ||||||||||||||||||||
| Placement Agent Cash Fee as Percentage of Gross Proceeds | 10.00% | |||||||||||||||||||||||
| Percentage of Aggregate Number of Shares of Common Stock Issuable Upon Conversion of Unit Offering Notes | 8.00% | 8.00% | ||||||||||||||||||||||
| Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per Item) | 0.69 | 0.69 | 0.43 | 0.60 | 0.60 | |||||||||||||||||||
| Warrants Not Settleable in Cash, Fair Value Disclosure (in Dollars) | 237,299 | 237,299 | ||||||||||||||||||||||
| Fair Value Assumptions, Expected Dividend Rate | 0.00% | 0.00% | 0.00% | |||||||||||||||||||||
| Fair Value Assumptions, Expected Volatility Rate | 49.00% | 48.00% | ||||||||||||||||||||||
| Fair Value Assumptions, Risk Free Interest Rate | 0.93% | 0.89% | ||||||||||||||||||||||
| Fair Value Assumptions, Expected Term | 5 years | 5 years | ||||||||||||||||||||||
| Deferred Offering Costs (in Dollars) | 237,299 | 237,299 | ||||||||||||||||||||||
| Intrinsic Value of Beneficial Conversion Feature (in Dollars) | 383,204 | 383,204 | ||||||||||||||||||||||
| Estimated Fair Value of Common Stock (in Dollars per share) | $ 0.60 | $ 0.60 | ||||||||||||||||||||||
| Approximate Market Interest Rate | 10.00% | 10.00% | ||||||||||||||||||||||
| Effective Conversion Price of Conversion Feature Under Unit Offering Notes (in Dollars per share) | $ 0.54 | $ 0.54 | ||||||||||||||||||||||
| Minimum Net Proceeds of a Qualified Financing (in Dollars) | 10,000,000 | |||||||||||||||||||||||
| Percentage of Outstanding Shares of Stock on Fully Diluted Basis | 10.00% | |||||||||||||||||||||||
| Period to Complete a Qualified Financing | 360 days | 180 days | ||||||||||||||||||||||
| Convertible Notes Payable, Noncurrent (in Dollars) | $ 2,000,000 | $ 2,000,000 | $ 3,308,390 | $ 2,000,000 | ||||||||||||||||||||