XML 134 R120.htm IDEA: XBRL DOCUMENT v3.20.4
Revenues - Additional Information (Detail1)
Dec. 31, 2020
Maximum [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2021-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Performance obligations term 1 year