Discontinued Operations The operating results of the Regenerative Medicine – China business (Details) (Regenerative Medicine - China segment [Member], USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 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	$ 52,300	$ 274,300
Disposal Group, Including Discontinued Operation, Costs of Goods Sold	(30,600)	(140,600)
Disposal Group Including Discontinued Operation Research and Development	(103,300)	(378,300)
Disposal Group Including Discontinued Operation Selling General and Administrative	(497,300)	(3,089,800)
Disposal Group, Including Discontinued Operation, Operating Expense	(6,800)	(9,700)
Loss on Exit of Segment	(1,138,000)	0
Disposal Group, Including Discontinued Operation, Operating Income (Loss)	$ (1,723,700)	$ (3,344,100)