Summary of Significant Accounting Policies - Schedule of Other Current Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Accounting Policies [Abstract]
Lab supply inventory	$ 1,885	$ 1,825
Prepaid expenses	826	971
Funds in escrow	888	888
Due from CGI	1,297	92
Other	80	75
Total other current assets	$ 4,976	$ 3,851