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Commitments and Contingencies - Additional Information (Detail)
9 Months Ended
Sep. 30, 2020
Linksmart Litigation [Member]  
Loss Contingencies [Line Items]  
Litigation filing date April 20, 2018
Securities Litigation [Member]  
Loss Contingencies [Line Items]  
Litigation filing date June 27, 2018
Derivative Litigation [Member]  
Loss Contingencies [Line Items]  
Litigation filing date September 25, 2018 and September 26, 2018