Leases - Prior to Adoption of ASU 2016-02 (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Leases.
Rent expense	$ 1,500	$ 1,200
Future minimum lease payments under operating leases:
Due within one year	1,570
Due in one year to two years	1,776
Due in two years to three years	1,568
Due in three years to four years	947
Due in four years to five years	964
Thereafter	2,154
Total minimum lease payments	$ 8,979