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Note 6 - Related Party Notes Payable (Detail) (USD $)
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1 Months Ended | 12 Months Ended | 1 Months Ended | 1 Months Ended | 12 Months Ended | 1 Months Ended | 4 Months Ended | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Jul. 31, 2012
|
Feb. 29, 2012
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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Feb. 02, 2012
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Nov. 30, 2010
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Feb. 29, 2012
If Converted Prior to Maturity Date or Consumption of Qualified IPO [Member]
Related Party BSC Convertible Notes Payable [Member]
|
Feb. 29, 2012
If Converted In Context Other than Qualified Financing [Member]
Related Party BSC Convertible Notes Payable [Member]
|
Feb. 02, 2012
Qualified Financing from Medtronic, Inc., St. Jude Medical, Inc., or Johnson & Johnson [Member]
Related Party BSC Convertible Notes Payable [Member]
|
Feb. 02, 2012
Other Investors [Member]
Related Party BSC Convertible Notes Payable [Member]
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Feb. 29, 2012
Related Party BSC Convertible Notes Payable [Member]
|
Dec. 31, 2012
Related Party BSC Convertible Notes Payable [Member]
|
Dec. 31, 2011
Related Party BSC Convertible Notes Payable [Member]
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Dec. 31, 2010
Related Party BSC Convertible Notes Payable [Member]
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Dec. 31, 2009
Related Party BSC Convertible Notes Payable [Member]
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Feb. 02, 2012
Related Party BSC Convertible Notes Payable [Member]
|
Feb. 29, 2012
Related Party 2011 Unsecured Convertible Notes Payable [Member]
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Sep. 30, 2011
Related Party 2011 Unsecured Convertible Notes Payable [Member]
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Dec. 31, 2011
Related Party 2011 Unsecured Convertible Notes Payable [Member]
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|
| Proceeds from Related Party Debt | $ 3,500,000 | |||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 3.50% | 10.00% | 0.00% | 15.00% | ||||||||||||||||
| Related Party Convertible Notes Payable, Extension Period | 3 years | |||||||||||||||||||
| Interest Expense, Related Party | 39,499 | 388,678 | 356,452 | |||||||||||||||||
| 4,338,601 | 4,377,294 | 4,338,601 | ||||||||||||||||||
| Maximum Percentage of Cash Proceeds from Qualified Financing Used to Prepay Outstanding Related Party Notes | 100.00% | 25.00% | ||||||||||||||||||
| Threshold Amount of Qualified Initial Public Offering | 20,000,000 | |||||||||||||||||||
| Debt Instrument, Convertible, Conversion Ratio | 1 | 1 | ||||||||||||||||||
| Debt Instrument, Convertible, Conversion Price (in Dollars per share) | $ 8.00 | $ 0.60 | ||||||||||||||||||
| Proceeds from Unsecured Notes Payable | 1,310,000 | |||||||||||||||||||
| Warrants Issued During Period (in Shares) | 2,727,274 | 7,652,071 | 2,122,500 | 25,444 | 1,310,000 | |||||||||||||||
| Term of Related Party Unsecured Convertible Notes Payable | 2 years | |||||||||||||||||||
| Term of Warrants | 5 years | 2 years | ||||||||||||||||||
| Warrants Issued During Period, Weighted Average Exercise Price (in Dollars per share) | $ 1.45 | $ 1.05 | $ 0.29 | $ 8.00 | $ 0.01 | |||||||||||||||
| Conversion Price of Unsecured Convertible Notes Payable Upon Consummation of Initial Public Offering | 60.00% | |||||||||||||||||||
| Conversion Price of Unsecured Convertible Notes Payable Upon Consummation of Reverse Merger | 60.00% | |||||||||||||||||||
| Debt Conversion, Original Debt, Amount | 10,811,500 | 1,425,865 | ||||||||||||||||||
| Debt Conversion, Converted Instrument, Shares Issued (in Shares) | 2,376,447 | |||||||||||||||||||
| Warrants and Rights Outstanding | 486,102 | |||||||||||||||||||
| Debt Instrument, Face Amount | 3,000,000 | 1,310,000 | ||||||||||||||||||
| Debt Instrument, Unamortized Discount | $ 2,775,300 | $ 486,102 | ||||||||||||||||||
| Investment Warrants, Exercise Price (in Dollars per share) | $ 0.01 | |||||||||||||||||||
| Share Price (in Dollars per share) | $ 0.60 | |||||||||||||||||||