Income Taxes - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2017	Dec. 31, 2019	Dec. 31, 2018
Income Taxes [Line Items]
Provision for income taxes	$ 0	$ 0
Percentage of cumulative ownership changes	50.00%
Unrecognized tax benefits	$ 407,000	$ 156,000		$ 238,000
Unrecognized tax benefits would affect the company's effective tax rate	0
Interest related to unrecognized tax benefits	0
Penalties related to unrecognized tax benefits	0
Federal
Income Taxes [Line Items]
Net operating loss carryforwards	130,400,000		$ 4,700,000		$ 125,700,000
Operating loss carryforwards begin to expire			2036
Operating loss carryforwards offset of taxable income percentage			100.00%
Operating loss carryforwards limitation rate on taxable income		80.00%
Tax credit carryforwards	$ 3,300,000
Tax credit carryforward, expiration year	2037
Federal | Research and Development
Income Taxes [Line Items]
Tax credit carryforwards	$ 1,200,000
State
Income Taxes [Line Items]
Net operating loss carryforwards	$ 2,900,000
Operating loss carryforwards begin to expire	2036
State | California | Research and Development
Income Taxes [Line Items]
Tax credit carryforwards	$ 800,000