Revenue and Deferred Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020	Aug. 31, 2019	Feb. 28, 2019
Deferred Revenue Arrangement [Line Items]
Deferred revenue	$ 445		$ 445		$ 250
Research and Development Activties | Biotechnology company
Deferred Revenue Arrangement [Line Items]
Deferred revenue							$ 900
Grant | NH Grant
Deferred Revenue Arrangement [Line Items]
Deferred revenue		$ 900		$ 900		$ 1,100
Revenue recognized	$ 100	$ 100	$ 200	$ 200