Commitments and Contingencies - Information Related to Operating Lease (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Commitments And Contingencies Disclosure [Abstract]
Operating lease expense (including variable costs of $96 and $59 during the three months ended June 30, 2021 and 2020, respectively, and $184, and $141 during the six months ended June 30, 2021 and 2020, respectively)	$ 294	$ 257	$ 579	$ 536
Cash paid for amounts included in the measurement of lease liabilities	$ 216	$ 184	$ 425	$ 364