Stockholders' Equity - Common Stock Reserved for Future Issuance (Details)	Dec. 31, 2020 shares
Class of Stock [Line Items]
Total common shares reserved for future issuance	416,562
Inducement Plan
Class of Stock [Line Items]
Total common shares reserved for future issuance	1,250
Stock Option Plans
Class of Stock [Line Items]
Total common shares reserved for future issuance	53,356
Employee Stock Purchase Plan
Class of Stock [Line Items]
Total common shares reserved for future issuance	0
Options
Class of Stock [Line Items]
Total common shares reserved for future issuance	361,956