| Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block] |
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Carrying
Value
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Related
party BSC convertible notes payable
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$
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4,338,601
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$
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3,469,704
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Convertible
note payable
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2,000,000
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2,000,000
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Junior
secured notes payable
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192,120
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1,832,102
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Carrying Value
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Estimated
Fair
Value
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Related
party BSC convertible notes payable
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$
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3,500,000
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$
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3,500,000
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2010
unsecured convertible notes payable
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3,953,595
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4,071,000
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2010
junior secured notes payable
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194,314
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1,746,222
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2011
related party unsecured convertible notes
payable
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877,294
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1,310,000
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2011
junior secured note payable
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2,000,000
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2,000,000
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2011
junior secured convertible notes payable
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1,308,390
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|
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1,625,000
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| Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] |
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Three
and Six Months Ended June 30,
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2012
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2011
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Stock
options
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6,111,127
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3,762,477
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Warrants
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6,258,648
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435,986
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Shares
under convertible note agreements
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4,287,695
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8,524,756
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16,657,470
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12,723,219
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Years
Ended December 31,
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2011
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2010
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2009
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Stock
options
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3,679,977
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3,762,477
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669,777
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Warrants
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1,922,944
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435,986
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410,542
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Convertible
preferred shares
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1,991,250
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1,991,250
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1,991,250
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Shares
under convertible note agreements
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1,046,263
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997,678
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444,247
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8,640,434
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7,187,391
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3,515,816
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