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Organization and Summary of Significant Accounting Policies (Details 3) - shares
3 Months Ended 12 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Dec. 31, 2019
Common shares equivalents, outstanding 27,430,594 18,685,872 24,273,668 18,817,702
Convertible Preferred Stock        
Common shares equivalents, outstanding 15,290,988 16,939,013 16,550,275 16,616,250
Warrants        
Common shares equivalents, outstanding 5,796,843 470,939 3,653,443 470,939
Stock Awards        
Common shares equivalents, outstanding 554,000 402,500 554,000 857,093
Options        
Common shares equivalents, outstanding 2,188,258 873,420 1,690,758 873,420
Convertible Notes        
Common shares equivalents, outstanding 3,600,505 0 1,825,192