Nature of Business and Significant Accounting Policies - Schedule of Other Current Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accounting Policies [Abstract]
Indemnification assets		$ 875
Lab supply inventory	1,825
Prepaid assets	971	1,230
Funds in escrow	888
Other	167	65
Total other current assets	$ 3,851	$ 2,170