Leases (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Finance lease cost components:
Amortization of finance lease assets	$ 14	$ 17
Interest on finance lease liabilities	6	11
Total finance lease costs	20	28
Operating lease cost components:
Operating lease cost	144	140
Variable lease cost	31	27
Short-term lease cost	10	2
Total operating lease costs	185	169
Total lease cost	$ 205	$ 197