XML 67 R43.htm IDEA: XBRL DOCUMENT v3.20.4
Summary of Significant Accounting Policies - Revenue Recognition (Details)
 12 Months Ended
Dec. 31, 2020
Accounting Policies [Abstract]  
Contract term 3 years
Contract termination, notice period, low end of range 30 days
Contract termination, notice period, high end of range 90 days