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Fair Value Measurements and Disclosures (Tables)
 3 Months Ended
Mar. 31, 2015
Fair Value Disclosures [Abstract]  
Schedule Of Financial Assets And Liabilities At Fair Value [Table Text Block]
The following table represents the fair value hierarchy for our financial assets and liabilities measured at fair value on a recurring basis as of March 31, 2015 and December 31, 2014:
 
 
 
As of March 31, 2015
 
Description
 
Level 1
 
Level 2
 
Level 3
 
Total
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Assets
 
 
 
 
 
 
 
 
 
 
 
 
 
Investment in money market funds
 
$
11,099,242
 
$
-
 
$
-
 
$
11,099,242
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Total investment in money market funds
 
$
11,099,242
 
$
-
 
$
-
 
$
11,099,242
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Liabilities
 
 
 
 
 
 
 
 
 
 
 
 
 
Embedded conversion options
 
$
-
 
$
-
 
$
5,740,238
 
$
5,740,238
 
Stock purchase warrants
 
 
-
 
 
-
 
 
15,740,705
 
 
15,740,705
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Total derivative liabilities
 
$
-
 
$
-
 
$
21,480,943
 
$
21,480,943
 
 
 
 
As of December 31, 2014
 
Description
 
Level 1
 
Level 2
 
Level 3
 
Total
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Assets
 
 
 
 
 
 
 
 
 
 
 
 
 
Investment in money market funds
 
$
15,736,350
 
$
-
 
$
-
 
$
15,736,350
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Total investment in money market funds
 
$
15,736,350
 
$
-
 
$
-
 
$
15,736,350
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Liabilities
 
 
 
 
 
 
 
 
 
 
 
 
 
Embedded conversion options
 
$
-
 
$
-
 
$
4,362,225
 
$
4,362,225
 
Stock purchase warrants
 
 
-
 
 
-
 
 
25,484,596
 
 
25,484,596
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Total derivative liabilities
 
$
-
 
$
-
 
$
29,846,821
 
$
29,846,821
 
Fair Value, Measurement Inputs, Disclosure [Table Text Block]
The following tables set forth a summary of changes in the fair value of Level 3 liabilities measured at fair value on a recurring basis for the quarters ended March 31, 2015 and 2014:
 
Description
 
Balance at
December 31,
2014
 
Established in
2015
 
Effect of Conversion to Common
Stock
 
Change in
Fair Value
 
Balance at
March 31,
2015
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Derivative liabilities:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Embedded conversion options
 
$
4,362,225
 
$
-
 
$
-
 
$
1,378,013
 
$
5,740,238
 
Stock purchase warrants
 
 
25,484,596
 
 
-
 
 
-
 
 
(9,743,891)
 
 
15,740,705
 
 
Description
 
Balance at
December 31,
2013
 
Established in
2014
 
Effect of Conversion to Common
Stock
 
Change in
Fair Value
 
Balance at
March 31,
2014
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Derivative liabilities:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Embedded conversion options
 
$
1,515,540
 
$
3,567,834
 
$
(1,860,779)
 
$
(228,735)
 
$
2,993,860
 
Stock purchase warrants
 
 
1,733,055
 
 
7,681,189
 
 
-
 
 
27,673
 
 
9,441,917