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COVID-19
9 Months Ended
Sep. 30, 2021
Unusual or Infrequent Items, or Both [Abstract]  
COVID-19 COVID-19 The COVID-19 outbreak in the United States has caused significant business disruption. Thus far COVID-19 has not caused material disruptions to the Company's operational and financial performance. A prolonged outbreak could have a material adverse impact on financial results and business operations of the Company, including the timing and ability of the Company to complete certain clinical trials and other efforts required to advance the development of its drugs and raise additional capital.