Related Party Transactions - Additional Information (Details) - USD ($)		12 Months Ended
	Apr. 15, 2020	Dec. 31, 2021	Dec. 31, 2020	May 31, 2017
Related Party Transaction [Line Items]
Proceeds from note payable due to related party			$ 12,400,000
PDL BioPharma, Inc
Related Party Transaction [Line Items]
Expenses from transactions with related party		$ 0	3,387,000
Expense related to allocation of corporate costs		0	0
Costs associated with spin-off transaction		0	0
Maximum aggregate principal amount	$ 32,600,000			$ 25,600,000
Line of credit limit increased amount	$ 7,000,000
Proceeds from note payable due to related party			12,400,000
Interest expense		$ 0	$ 511,000