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Income Taxes (Details 3) (USD $)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2011
Aldagen Inc [Member]
Dec. 31, 2010
Aldagen Inc [Member]
U.S. Federal statutory income tax 35.00% 35.00% (34.00%) (34.00%)
State and local income tax benefits 4.20% 3.40% (4.50%) (4.60%)
Valuation allowance for deferred income tax assets (26.60%) (39.10%) 41.00% 36.00%
Federal income tax credits     (3.00%) (4.50%)
Amortization of debt discount     9.00% 10.10%
Fair value of Derivatives (6.80%) 4.70%    
Nondeductible guarantee fees (3.70%) (2.00%) (8.70%) (4.90%)
Other (2.10%) (1.50%) 0.20% 1.90%
Effective income tax rate 0.10% 0.50% 0.00% 0.00%
United States Federal tax at statutory rate     $ (2,310,400) $ (3,269,800)
State taxes (net of Federal benefit)     (309,100) (437,600)
Change in valuation reserves     2,746,800 3,464,100
Federal income tax credits     (149,800) (433,600)
Amortization of debt discount     468,200 969,400
Other nondeductible expenses     (454,600) (471,700)
Other     8,900 179,200
Provision for income taxes     $ 0 $ 0