Summary of Significant Accounting Policies - Net Loss Per Share (Details) - shares	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Totals	61,662,075	854,036
Options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Totals	7,012,891	120,796
Warrants
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Totals	49,398,338	93,252
Convertible preferred stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Totals	846	846
Restricted Stock Award
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Totals	5,250,000	0
ATM sales of common stock to be issued
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Totals	0	639,142