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Discontinued Operations The operating results of the Regenerative Medicine – China business (Details) (Regenerative Medicine - China segment [Member], USD $)
 3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Regenerative Medicine - China segment [Member]
        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Disposal Group, Including Discontinued Operation, Revenue $ 0 $ 98,800 $ 52,300 $ 148,900
Disposal Group, Including Discontinued Operation, Costs of Goods Sold 0 (31,300) (30,600) (49,400)
Disposal Group Including Discontinued Operation Research and Development 0 93,600 (103,300) (64,500)
Disposal Group Including Discontinued Operation Selling General and Administrative 0 (782,300) (497,300) (1,572,300)
Disposal Group, Including Discontinued Operation, Operating Expense 0 1,400 (6,800) (11,300)
Loss on Exit of Segment 0 0 (1,138,000) 0
Disposal Group, Including Discontinued Operation, Operating Income (Loss) $ 0 $ (619,800) $ (1,723,700) $ (1,548,600)