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Stockholders' Equity - Schedule of Nonvested Stock Option (Details) - Equity Incentive 2011 Plan [Member] - $ / shares
 3 Months Ended 12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward]        
Common shares, nonvested beginning of period 600,779 300,510 300,510  
Common shares, granted 8,917 30,542 586,552  
Common shares, vested (56,128)   (197,202)  
Common shares, forfeited (3,141)   (89,081)  
Common shares, nonvested end of period 550,427   600,779 300,510
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]        
Weighted average grant date fair value, nonvested beginning of period $ 0.64 $ 0.80 $ 0.80  
Weighted average grant date fair value, granted 0.16 $ 0.91 0.40  
Weighted average grant date fair value, vested 1.20   1.44  
Weighted average grant date fair value, forfeited 0.88   0.80  
Weighted average grant date fair value, nonvested end of period $ 0.56   $ 0.64 $ 0.80
Weighted average remaining years to vest (in years) 2 years 9 months 15 days   2 years 11 months 27 days 2 years 5 months