Annual report pursuant to Section 13 and 15(d)

Income Taxes - Narrative (Details)

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Income Taxes - Narrative (Details) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Income Tax Disclosure [Abstract]    
Income tax expense $ 0 $ 0
Statutory federal income tax rate 21.00% 21.00%
Federal net operating loss carryforwards $ 56,100,000  
Additional net operating loss carryforwards 11,200,000  
Federal net operating loss carryforwards subject to expiration 24,600,000  
Increase in valuation allowance $ 3,100,000 $ 2,900,000