Commitments and Contingencies - Additional Information (Details) $ in Millions				3 Months Ended	12 Months Ended
	Mar. 31, 2019	Apr. 04, 2018 USD ($)	Jun. 09, 2016 case	Mar. 31, 2020 USD ($) issuer	Dec. 31, 2019 USD ($)
Loss Contingencies [Line Items]
Class action cases (in cases) | case			2
Number of days to file a complaint	30 days
Number of issuers arbitration initiated with (issuers) | issuer				2
Right of termination prior written notice period		30 days
Payment for contingent consideration liability		$ 0.3
Time period supplemental unemployment benefits to be paid				18 months
The Scripps Research Institute
Loss Contingencies [Line Items]
License agreement milestone expense					$ 0.5
Chief Executive Officer
Loss Contingencies [Line Items]
Severance benefits				$ 1.0
Officers' compensation				0.2
Salary accrued				0.4
Insurance Coverage Arbitration
Loss Contingencies [Line Items]
Damages sought				$ 3.4