Revenues - Additional Information (Detail) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2020 USD ($) Customer	Mar. 31, 2019 Customer	Dec. 31, 2019 USD ($) Customer
Disaggregation Of Revenue [Line Items]
Deferred revenue recorded in current liabilities | $	$ 19,648		$ 7,815
Deferred revenue recorded in other non-current liabilities | $	$ 5,100		$ 5,400
Accounts Receivable [Member] | Customer Concentration Risk [Member]
Disaggregation Of Revenue [Line Items]
Number of customers	0		0
Concentration risk percentage	10.00%		10.00%
Revenues [Member] | Customer Concentration Risk [Member]
Disaggregation Of Revenue [Line Items]
Number of customers	0
Concentration risk percentage	10.00%
Revenues [Member] | Customer Concentration Risk [Member] | Customer One [Member]
Disaggregation Of Revenue [Line Items]
Number of customers		1
Concentration risk percentage		11.00%
Minimum [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contract with customers terms	1 year
Accounts receivable payment terms	30 days
Maximum [Member]
Disaggregation Of Revenue [Line Items]
Revenue from contract with customers terms	8 years
Accounts receivable payment terms	45 days