Annual report pursuant to Section 13 and 15(d)

Income Taxes - Reconciliation of Federal Statutory Income Tax Rate to Company's Effective Income Tax Rate (Details)

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Income Taxes - Reconciliation of Federal Statutory Income Tax Rate to Company's Effective Income Tax Rate (Details)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Income Tax Disclosure [Abstract]    
Expected income tax benefit at the federal statutory rate 21.00% 21.00%
State and local taxes, net of federal benefit 12.50% 13.10%
Research and development credit, net 2.60% 2.30%
Non-deductible items and other (0.80%) (3.30%)
Change in valuation allowance (35.30%) (33.10%)
Total 0.00% 0.00%