Acquisition - Schedule of Acquisition Date Fair Value (Details) - Genoptix $ / shares in Units, $ in Thousands	Dec. 10, 2018 USD ($) $ / shares shares
Business Acquisition [Line Items]
Shares of common stock issued as consideration (in shares) | shares	1,000,000
Stock price per share on closing date (in dollars per share) | $ / shares	$ 13.94
Value of common stock issued as consideration	$ 13,940
Issue discount due to lack of marketability	(697)
Fair value of common stock at December 10, 2018	$ 13,243