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Income Taxes (Narrative) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Oct. 01, 2020
Operating Loss Carryforwards [Line Items]      
Net deferred tax liabilities increase due to acquisition of MVE and CRYOPDP     $ 5,700
Increase in valuation allowance on deferred tax assets $ 11,700 $ 2,100  
Deferred tax liability indefinite-lived assets $ 4,253    
Operating Loss Carryforwards   9,800  
Operating Loss Carryforwards, Percent 80.00%    
Accrual for interest and penalties   0  
Federal Tax Income [Member]      
Operating Loss Carryforwards [Line Items]      
Operating Loss Carryforwards   38,600  
Domestic Tax Authority [Member]      
Operating Loss Carryforwards [Line Items]      
Operating Loss Carryforwards   57,600  
Tax Credit Carryforward, Amount   400  
State and Local Jurisdiction [Member]      
Operating Loss Carryforwards [Line Items]      
Operating Loss Carryforwards   60,900  
Tax Credit Carryforward, Amount   $ 300