Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Operating Loss Carryforwards [Line Items]
Valuation allowance	$ 15,517	$ 8,192
Valuation allowance, increase	$ 7,300
Federal corporate tax rate	21.00%	21.00%	21.00%
Minimum
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards, expiration period	2027
Maximum
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards, expiration period	2040
Federal
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 69,100
Net operating loss carryforwards, not subject to expiration	49,800
California
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 89,400