Acquisitions - Measurement Period Adjustments (Details) - GENEWIZ - USD ($) $ in Thousands	Mar. 31, 2019	Nov. 15, 2018
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Prepaid expenses and other current assets		$ 11,210
Other current liabilities		$ 7,446
Scenario, Adjustment
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Prepaid expenses and other current assets	$ 700
Other current liabilities	$ 700