Commitments and Contingencies - Additional Information (Details) $ in Thousands	1 Months Ended		3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018 ft²	Apr. 30, 2018 ft²	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Dec. 31, 2020 ft²
Loss Contingencies [Line Items]
Rent expense | $			$ 217	$ 151	$ 353	$ 355
Northbrook, IL
Loss Contingencies [Line Items]
Operating lease square feet of office space		9,000
Operating lease expiration month and year		2020-01
Plymouth Meeting, PA
Loss Contingencies [Line Items]
Operating lease square feet of office space	15,000						13,000
Operating lease expiration month and year	2024-05						2024-05