Business Combinations - Additional Information (Detail) - USD ($) $ in Thousands		6 Months Ended	12 Months Ended
	Apr. 04, 2019	Jun. 30, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Goodwill		$ 36,843	$ 36,910
Developed technology
Business Acquisition [Line Items]
Amortization period		5 years 8 months 12 days	5 years 4 months 24 days
ClearStory Data Inc.
Business Acquisition [Line Items]
Business combination acquired percentage	100.00%
Aggregate consideration payable in exchange for outstanding equity interest	$ 19,600
Cash consideration held back for customary indemnification matters amount	$ 3,000
Cash consideration held back for customary indemnification matters period	18 months
Business combination, employee retention compensation	$ 6,000
Business combination, employee retention compensation, award vesting period	3 years
Business combination, employee retention compensation period	24 months
Goodwill	$ 9,500
Purchase price allocation, assets acquired and liabilities assumed, net	$ 600
Amortization period	4 years
ClearStory Data Inc. | Developed technology | Level 3
Business Acquisition [Line Items]
Fair value of completed technology	$ 10,700
ClearStory Data Inc. | Developed technology | Level 3 | Measurement Input, Discount Rate
Business Acquisition [Line Items]
Business combination, measurement input, discount rate	0.20