Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating Loss Carryforwards [Line Items]
Federal corporate income tax rate	21.00%	21.00%
Tax credit carryforward	$ 900	$ 900
Valuation allowance	$ 51,895	36,595	$ 22,513
Minimum [Member]
Operating Loss Carryforwards [Line Items]
Limitation range for income tax examination year	1 year
Maximum [Member]
Operating Loss Carryforwards [Line Items]
Limitation range for income tax examination year	4 years
Federal [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 31,000	29,000
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	6,500	6,600
Foreign [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 2,900	$ 1,500