Commitments and Contingencies - Additional Information (Details) $ in Millions	1 Months Ended		6 Months Ended
	May 31, 2019	Jan. 31, 2018 USD ($) Tranche shares	Jun. 30, 2019 USD ($)
Commitments And Contingencies [Line Items]
Operating lease, description			We lease facilities for office and manufacturing space under various operating leases and a security system under a financing lease.
Finance Lease, Description			We lease facilities for office and manufacturing space under various operating leases and a security system under a financing lease.
Operating lease, existence of option to extend			true
Operating lease, option to extend			Our leases have remaining lease terms of approximately 1 year to 6 years, which represent the non-cancellable periods of the leases and include extension options that we determined are reasonably certain to be exercised. We exclude extension options that are not reasonably certain to be exercised from our lease terms.
Finance lease, existence of option to extend			true
Finance lease, option to extend			Our leases have remaining lease terms of approximately 1 year to 6 years, which represent the non-cancellable periods of the leases and include extension options that we determined are reasonably certain to be exercised. We exclude extension options that are not reasonably certain to be exercised from our lease terms.
Operating lease, variable lease payment, terms and conditions			We use our incremental borrowing rate to calculate the present value of our lease payments, as the implicit rates in our leases are not readily determinable.
Finance lease, variable lease payment, terms and conditions			We use our incremental borrowing rate to calculate the present value of our lease payments, as the implicit rates in our leases are not readily determinable.
Archer Daniels Midland Company
Commitments And Contingencies [Line Items]
Long-term purchase commitment, restated agreement effective period after first delivery		10 years
Long-term purchase commitment, optional extension period		5 years
Long-term purchase commitment amount			$ 3.3
Long-term purchase commitment period			10 years
Archer Daniels Midland Company | Restricted Stock | Common Stock
Commitments And Contingencies [Line Items]
Long-term purchase commitment, shares issued | shares		300,000
Long-term purchase commitment, shares issued, vesting period		3 years 6 months
Long-term purchase commitment, fair value		$ 11.7
Number of tranches for vesting of shares | Tranche		4
CoreRx, Inc.
Commitments And Contingencies [Line Items]
Long-term purchase commitment amount			$ 4.3
Long-term purchase commitment expiration date	Dec. 31, 2024
Long-term purchase commitment renewal term	2 years
CoreRx, Inc. | AR101 Commercial Supply Requirements
Commitments And Contingencies [Line Items]
Percentage of long term purchase commitment minimum required quantity	100.00%
Number of years for minimum supply percentage after approval	6 years
Annual purchase commitments beginning year	2019
Annual purchase commitments ending year	2024
CoreRx, Inc. | AR101 Commercial Supply Requirements for Release Testing
Commitments And Contingencies [Line Items]
Percentage of long term purchase commitment minimum required quantity	100.00%
Number of years for minimum supply percentage after approval	6 years
Annual purchase commitments beginning year	2019
Annual purchase commitments ending year	2024
Manufacturing Facility
Commitments And Contingencies [Line Items]
Additional operating leases, not yet commenced, amount			$ 0.7
Additional operating leases, not yet commenced, description			we have additional operating leases, primarily for our manufacturing facility
Additional operating leases, not yet commenced, term			6 years 3 months
Minimum
Commitments And Contingencies [Line Items]
Remaining lease terms			1 year
Maximum
Commitments And Contingencies [Line Items]
Remaining lease terms			6 years
Maximum | Michael Foods, Inc.
Commitments And Contingencies [Line Items]
Long-term purchase commitment period			15 years