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Consolidated Statements of Equity (USD $)
Total
Series B Preferred Stock [Member]
Common Stock [Member]
Additional Paid-in Capital [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Deficit [Member]
Parent [Member]
Noncontrolling Interest [Member]
Treasury Stock [Member]
Beginning Balance at Dec. 31, 2011 $ 80,132,518 $ 100 $ 109,330 $ 200,858,638 $ 4,152,343 $ (143,094,854) $ 62,025,557 $ 18,106,961 $ 0
Beginning Balance (in shares) at Dec. 31, 2011   10,000 109,329,587            
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Net loss (9,206,868)         (9,348,133) (9,348,133) 141,265  
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures     861,004            
Foreign currency translation 161,847       3,843   3,843 158,004  
Share-based compensation 2,476,666   861 2,475,805     2,476,666    
Stock Issued During Period, Shares, New Issues     18,465,404            
Proceeds from issuance of common stock 7,691,059   18,465 7,672,594     7,691,059    
Repayment of Series E Preferred Principal and Dividends (in shares)     1,231,153            
Issuance Of Common Stock In Connection With Preferred Stock Settlement Value 522,112   1,231 628,725   (107,844) 522,112    
Ending Balance at Mar. 31, 2012 81,777,334 100 129,887 211,635,762 4,156,186 (152,550,831) 63,371,104 18,406,230 0
Ending Balance (in shares) at Mar. 31, 2012   10,000 129,887,148            
Beginning Balance at Dec. 31, 2012 32,820,159 100 163,754 231,071,236 0 (197,392,361) 33,177,129 (356,970) (665,600)
Beginning Balance (in shares) at Dec. 31, 2012   10,000 163,753,653            
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Net loss (8,864,329)         (8,800,575) (8,800,575) (63,754)  
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures     1,774,917            
Share-based compensation 2,218,530   1,775 2,216,755     2,218,530    
Stock Issued During Period, Shares, New Issues     4,542,551            
Proceeds from issuance of common stock 2,730,263   4,543 2,725,720     2,730,263    
Proceeds from warrant exercises (in shares)     207,610            
Proceeds from warrant exercises 105,881   207 105,674     105,881    
Stock Issued During Period, Shares, Warrant Inducements     0            
Warrant inducements (6,239)   0 (6,239)     (6,239)    
Ending Balance at Mar. 31, 2013 $ 29,004,265 $ 100 $ 170,279 $ 236,113,146 $ 0 $ (206,192,936) $ 29,424,989 $ (420,724) $ (665,600)
Ending Balance (in shares) at Mar. 31, 2013   10,000 170,278,731