Registration of securities issued in business combination transactions

Income Taxes (Narrative) (Details)

v3.20.2
Income Taxes (Narrative) (Details) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Dec. 31, 2018
Operating Loss Carryforwards [Line Items]        
Provision for Income Taxes    
Operating loss carry-forward $ 157,964,000   $ 156,586,000 147,086,000
Net operating loss carry-forwards expiration     Dec. 31, 2021  
Federal And State [Member]        
Operating Loss Carryforwards [Line Items]        
Provision for Income Taxes $ 0 $ 0 $ 0 $ 0