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Certain Balance Sheet Items (Details 2) (USD $)	Mar. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2011 Aldagen Inc [Member]	Dec. 31, 2010 Aldagen Inc [Member]
Research and development expense				$ 66,606	$ 14,465
Compensation				0	139,394
Other	251,087	388,109	166,029	33,917	5,395
Total accrued expenses				$ 100,523	$ 159,254

Carrying value as of the balance sheet date of obligations incurred through that date and payable arising from transactions not otherwise specified in the taxonomy. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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