Annual report pursuant to Section 13 and 15(d)

Income Taxes (Narrative) (Details)

v3.21.1
Income Taxes (Narrative) (Details) - USD ($)
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Income Tax Disclosure [Line Items]    
Income tax expense (benefit) $ 136,000 $ 0
Effective income tax rate 0.13% 0.00%
Operating Loss Carryforwards, Valuation Allowance $ 203,900,000  
Minimum ownership interest in subsidiaries for consolidated income tax return 80.00%  
Unrecognized tax benefits $ 0  
Unrecognized tax benefits, interest and penalties 0  
Increase (decrease) in valuation allowance $ 35,700,000  
Income tax credits expiration date Dec. 31, 2028  
Caelum [Member]    
Income Tax Disclosure [Line Items]    
Income tax expense (benefit)   $ 0
Federal [Member]    
Income Tax Disclosure [Line Items]    
Operating loss carryforwards without expiration $ 284,800,000  
Net operating losses (NOLs) 525,700,000  
Income tax credits $ 15,400,000  
Net operating losses (NOLs), expiration Dec. 31, 2026  
State and Local Jurisdiction [Member]    
Income Tax Disclosure [Line Items]    
Operating loss carryforwards without expiration $ 4,500,000  
Net operating losses (NOLs) 648,200,000  
Income tax credits $ 1,200,000  
Net operating losses (NOLs), expiration Dec. 31, 2022