Details of Certain Balance Sheet Accounts (Schedule of Prepaid Expenses and Other Current Assets) (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Details Of Certain Balance Sheet Accounts [Abstract]
Prepaid payroll	$ 0	$ 7,566
Prepaid workers' compensation and liability insurance	2,138	3,399
Prepaid Licensing fees	4,657	3,722
Workers' compensation insurance receivable	606	666
Other	2,825	1,992
Total prepaid expenses and other current assets	$ 10,226	$ 17,345