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Summary of Significant Accounting Polices - Future Amortization Expense of Finite-Lived Intangible Assets (Details) - USD ($)
Dec. 31, 2020
Dec. 31, 2019
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]    
2021 $ 75,000  
2022 75,000  
2023 75,000  
2024 26,000  
2025 and thereafter 36,000  
Total $ 287,000 $ 362,000