Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions	1 Months Ended	6 Months Ended	12 Months Ended
	Sep. 30, 2018	Jun. 30, 2019	Dec. 31, 2018
Other Commitments [Line Items]
Cancellation fees	50.00%
Construction agreement and transfer fees		$ 11.7
Payment		2.8
Commercial Coating and Primary Packaging System
Other Commitments [Line Items]
Purchase commitments related to fixed assets		6.3
Equipment, Patch Assembly and Applicator, Retainer Machinery
Other Commitments [Line Items]
Purchase commitments related to fixed assets		$ 3.9
Aggregate purchase price paid			$ 2.0
Minimum
Other Commitments [Line Items]
Annual fees	$ 1.0
Maximum
Other Commitments [Line Items]
Annual fees	$ 14.0
Employee Stock Option | Minimum
Other Commitments [Line Items]
Vesting rights upon termination		25.00%
Employee Stock Option | Maximum
Other Commitments [Line Items]
Vesting rights upon termination		100.00%