Annual report pursuant to Section 13 and 15(d)

Income Taxes - Narrative (Details)

v3.20.1
Income Taxes - Narrative (Details) - USD ($)
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Income Taxes [Line Items]    
Increase in the valuation allowance $ (3,200,000)  
Uncertain tax positions interest and penalties accrued 0 $ 0
Federal    
Income Taxes [Line Items]    
Net operating loss carryforwards 20,100,000  
State    
Income Taxes [Line Items]    
Net operating loss carryforwards 26,700,000  
Germany    
Income Taxes [Line Items]    
Net operating loss carryforwards 1,200,000  
Germany | Corporate Income Tax Carryforwards    
Income Taxes [Line Items]    
Net operating loss carryforwards 90,500,000  
Germany | Trade Tax Carryforwards    
Income Taxes [Line Items]    
Net operating loss carryforwards $ 89,700,000