Fair Value Measurements (Tables)
 12 Months Ended
Dec. 31, 2013
Fair Value Disclosures [Abstract]  
Schedule of Derivative Liabilities at Fair Value [Table Text Block]
The following table identifies the carrying amounts of such assets and liabilities:
 
 
December 31, 2013
 
Level 1
 
Level 2
 
Level 3
 
Total
 
Liabilities
 
 
 
 
 
 
 
 
 
 
 
 
Derivative instruments - stock purchase warrants
$
-
 
$
-
 
$
1,417,527
 
$
1,417,527
 
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
The following table presents the activity for those items measured at fair value on a recurring basis using Level 3 inputs:
 
 
 
Derivative 
Instruments - Stock
Purchase Warrants
 
Stock Options
 
Balance at January 1, 2011
 
$
1,250,839
 
$
-
 
Extinguishment through warrant exercises and modifications
 
 
(1,089,030)
 
 
-
 
Change in fair value
 
 
(161,809)
 
 
-
 
Balance at December 31, 2011
 
 
-
 
 
-
 
Issuance
 
 
-
 
 
-
 
Change in fair value
 
 
-
 
 
-
 
Balance at December 31, 2012
 
 
-
 
 
-
 
Issuance
 
 
452,198
 
 
35,000
 
Satisfaction of contingency
 
 
-
 
 
(54,881)
 
Change in fair value
 
 
965,329
 
 
19,881
 
Balance at December 31, 2013
 
$
1,417,527
 
$
-