XML 69 R55.htm IDEA: XBRL DOCUMENT v3.20.4
Summary of Significant Accounting Policies - Summary of Antidilutive Securities (Details) - shares
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Anti-dilutive Securities      
Antidilutive securities 26,140 22,040 18,138