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Income Taxes (Details Narrative) - USD ($)
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Effective tax rate of expected statutory rate 21.00% 21.00%
Valuation allowance on deferred tax assets $ 23,740,000 $ 21,500,000
Operating loss, research and development tax credit forwards expiration year   Year beginning after 2017 but before 2022
Increase in valuation allowance 2,240,000  
Net operating loss carry-forwards $ 67,100,000  
Operating loss carry-forwards expiration years expire between 2026 and 2039  
Research and development tax credit carry-forwards $ 1,795,000 $ 1,795,000
Tax credit carry-forwards, expiration date expire between 2023 and 2037  
Duration for changes in ownership 3 years  
Percentage of income tax benefit likely of being realized upon settlement with tax authority Greater than 50%  
Net operating loss due to ownership changes $ 765,000  
Annual limitation due to ownership changes $ 1,151,000  
Effective tax rate expected statutory valuation allowance on net deferred tax assets 100.00% 100.00%
Research And Development [Member]    
Research and development tax credit carry-forwards $ 175,000  
Tax credit carry-forwards, expiration date between 2023 and 2038  
Tax Reform [Member]    
Effective tax rate of expected statutory rate 21.00%  
Income tax reconciliation description On December 22, 2017, the U.S. enacted the Tax Cuts and Jobs Act (the "Act"). The Act, which is also commonly referred to as "U.S. tax reform," significantly changes U.S. corporate income tax laws by, among other things, reducing the U.S. corporate income tax rate to 21% starting in 2018