Accrued Expenses (Schedule of Accrued Expenses) (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Accrued Expenses [Abstract]
Accrued payroll and bonus	$ 2,065	$ 4,208
Property and franchise taxes accrual	384	550
Accrued other miscellaneous liabilities	1,400	1,565
Total accrued expenses	$ 3,849	$ 6,323