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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]
Treasury Stock [Member]
Total NeoStem, Inc. Shareholders' Equity [Member]
Noncontrolling Interest [Member]
Beginning Balance at Dec. 31, 2011 $ 80,132,518 $ 100 $ 10,933 $ 200,957,035 $ 4,152,343 $ (143,094,854) $ 0 $ 62,025,557 $ 18,106,961
Beginning Balance (shares) at Dec. 31, 2011   10,000 10,932,959            
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Net loss (42,629,781)         (29,853,466)   (29,853,466) (12,776,315)
Foreign currency translation 197,429       21,989     21,989 175,440
Share-based compensation (in shares)     156,181            
Share-based compensation 3,555,011   156 3,554,855       3,555,011  
Net proceeds from issuance of common stock (in shares)     2,453,358            
Net proceeds from issuance of common stock 9,951,227   2,454 9,948,773       9,951,227  
Repayment of Series E Preferred Principal and Dividends (in shares)     219,492            
Repayment of Series E Preferred Principal and Dividends 652,167   219 848,183   (196,235)   652,167  
Ending Balance at Jun. 30, 2012 51,858,571 100 13,762 215,308,846 4,174,332 (173,144,555) 0 46,352,485 5,506,086
Ending Balance (shares) at Jun. 30, 2012   10,000 13,761,990            
Beginning Balance at Dec. 31, 2012 32,820,159 100 16,375 231,218,615 0 (197,392,361) (665,600) 33,177,129 (356,970)
Beginning Balance (shares) at Dec. 31, 2012   10,000 16,375,365            
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Net loss (17,489,971)         (17,375,935)   (17,375,935) (114,036)
Share-based compensation (in shares)     304,402            
Share-based compensation 3,314,197   304 3,313,893       3,314,197  
Net proceeds from issuance of common stock (in shares)     2,883,847            
Net proceeds from issuance of common stock 14,248,148   2,884 14,245,264       14,248,148  
Proceeds from warrant exercise (in shares)     20,761            
Proceeds from warrant exercise 105,881   21 105,860       105,881  
Warrant Inducements (in shares)     0            
Warrant inducements (6,239)   0 (6,239)       (6,239)  
Ending Balance at Jun. 30, 2013 $ 32,992,175 $ 100 $ 19,584 $ 248,877,393 $ 0 $ (214,768,296) $ (665,600) $ 33,463,181 $ (471,006)
Ending Balance (shares) at Jun. 30, 2013   10,000 19,584,375