Summary of Significant Accounting Policies - Schedule of Other Current Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Accounting Policies [Abstract]
Lab supply inventory	$ 2,331	$ 1,825
Prepaid expenses	728	971
Funds in escrow		888
Due from CGI	525	92
Other	167	75
Total other current assets	$ 3,751	$ 3,851