Revenues - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Disaggregation Of Revenue [Line Items]
Deferred revenue	$ 1,027	$ 1,572
Circle [Member]
Disaggregation Of Revenue [Line Items]
Deferred revenue	$ 900
Contract termination date	Apr. 15, 2021
Deferred revenue, recognized	$ 600
Amortization of intangible assets remaining	300
Finite lived intangible assets remaining amortization	400
Circle [Member] | Selling and Marketing Expense [Member]
Disaggregation Of Revenue [Line Items]
Impairment charge of intangible assets	$ 1,500