Revenue and Deferred Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020	Jun. 30, 2020	Aug. 31, 2019	Feb. 28, 2019
Deferred Revenue Arrangement [Line Items]
Deferred revenue	$ 256		$ 250
Research and Development Activties | Pharmaceutical Company
Deferred Revenue Arrangement [Line Items]
Deferred revenue	500
Revenue recognized	300
Research and Development Activties | Biotechnology company
Deferred Revenue Arrangement [Line Items]
Deferred revenue						$ 400
Grant revenue | NH Grant
Deferred Revenue Arrangement [Line Items]
Deferred revenue				$ 900	$ 1,100
Revenue recognized	$ 100	$ 200