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Other Financial Statement Information - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Concentration Risk [Line Items]          
Transaction price allocated to remaining performance obligations $ 4,600   $ 4,600    
Contract liability 4,600   4,600   $ 4,100
Deferred revenue, current 3,432   3,432   $ 3,297
Contract with customer, liability, revenue recognized $ 1,100   $ 2,100    
Revenue | Geographic Concentration Risk | UNITED STATES          
Concentration Risk [Line Items]          
Percentage of revenue 45.00% 53.00% 50.00% 57.00%