Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating Loss Carryforwards [Line Items]
Deferred income tax benefit		$ 132
Valuation allowance increased	$ 13,400	4,700
Net operating loss carry forwards expire beginning year	2028
Income taxes rolling year	3 years
Unrecognized tax benefits	$ 465	$ 447	$ 431
Tax Year 2008
Operating Loss Carryforwards [Line Items]
Open tax year	2008
Tax Year 2021
Operating Loss Carryforwards [Line Items]
Open tax year	2021
Minimum
Operating Loss Carryforwards [Line Items]
Ownership percentage	5.00%
Ownership percentage increased	50.00%
Maximum
Operating Loss Carryforwards [Line Items]
Current income tax expense	$ 100
Federal
Operating Loss Carryforwards [Line Items]
Operating loss carry forwards	$ 188,100
Income tax remain open year for examination	3 years
State
Operating Loss Carryforwards [Line Items]
Operating loss carry forwards	$ 165,500
Income tax remain open year for examination	4 years
Research | Federal
Operating Loss Carryforwards [Line Items]
Tax credit carryforwards	$ 1,500
Research | State
Operating Loss Carryforwards [Line Items]
Tax credit carryforwards	$ 1,500