Income Taxes - Narrative (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Tax Credit Carryforward [Line Items]
Accrued interest and penalties related to income tax matters	$ 0	$ 0
Federal
Tax Credit Carryforward [Line Items]
NOL carryforwards	273,776,000
Operating loss carryforwards, subject to expiration	72,579,000
Operating loss carryforwards, not subject to expiration	201,197,000
Federal | R&D
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	2,929,000
State
Tax Credit Carryforward [Line Items]
NOL carryforwards	169,332,000
State | R&D
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	$ 2,918,000