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Consolidated Statements of Operations (USD $)
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2010
Dec. 31, 2010
Dec. 31, 2009
Dec. 31, 2008
Revenues $ 18,460,723 $ 19,407,523 $ 38,101,836 $ 35,240,702 $ 69,821,294 $ 11,565,118 $ 83,541
Cost of revenues 13,517,717 12,911,800 27,812,353 23,763,418 49,668,262 9,706,005 31,979
Gross profit 4,943,006 6,495,723 10,289,483 11,477,284 20,153,032 1,859,113 51,562
Research and development 2,370,468 2,133,172 5,283,727 3,433,542 7,684,537 4,327,608 792,182
Selling, general, and administrative 12,590,999 7,865,477 23,015,993 14,154,965 31,346,806 23,400,430 8,492,833
Operating loss (10,018,461) (3,502,926) (18,010,237) (6,111,223) (18,878,311) (25,868,925) (9,233,453)
Other income (expense):              
Other income (expense), net 600,315 149,571 337,592 (14,502) 513,110 (16,053) 3,044
Interest expense (1,009,686) (6,198) (1,862,298) (14,717) (480,903) (23,135) (11,662)
Nonoperating Income (Expense), Total (409,371) 143,373 (1,524,706) (29,219) 32,207 (39,188) (8,618)
Loss from operations before provision for income taxes and noncontrolling interests (10,427,833) (3,359,553) (19,534,942) (6,140,442) (18,846,104) (25,908,113) (9,242,071)
Provision for income taxes 110,059 402,259 702,707 905,203 550,912 41,675  
Net loss (10,537,892) (3,761,812) (20,237,649) (7,045,645) (19,397,016) (25,949,788) (9,242,071)
Less - net income attributable to noncontrolling interests 67,875 1,611,501 541,108 2,940,154 3,908,690 220,865  
Net loss attributable to NeoStem, Inc. (10,605,767) (5,373,313) (20,778,757) (9,985,799) (23,305,706) (26,170,653) (9,242,071)
Preferred dividends 170,782 53,771 357,415 153,469 237,963 5,611,989  
Net loss attributable to NeoStem, Inc. common shareholders $ (10,776,549) $ (5,427,084) $ (21,136,172) $ (10,139,268) $ (23,543,669) $ (31,782,642) $ (9,242,071)
Basic and diluted loss per share $ (0.13) $ (0.11) $ (0.27) $ (0.23) $ (0.46) $ (2.44) $ (1.53)
Weighted average common shares outstanding 80,567,011 48,771,930 77,117,905 44,419,456 51,632,417 13,019,518 6,056,886