Amount of loss from reductions in inventory due to subsequent measurement adjustments, including, but not limited to, physical deterioration, obsolescence, or changes in price levels.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 330
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=116847112&loc=d3e4542-108314

Name:	us-gaap_InventoryWriteDown
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Inventory - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
Inventory - Additional Information (Detail) - USD ($)	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Inventory [Line Items]
Inventory finished goods shelf life			24 months
Write-downs to inventory			$ 0
Product [Member] \| United Kingdom Facility at Patheon UK Limited [Member]
Inventory [Line Items]
Cost of sales expense for unabsorbed manufacturing and overhead costs	$ 900,000	$ 5,000,000.0	$ 900,000	$ 1,400,000