Subsequent Events - Additional Information - (Detail) - Glenmark Therapeutics Inc - Subsequent Event [Member]	Apr. 08, 2019
Subsequent Event [Line Items]
Co-Promotion agreement term	5 years
Minimum [Member]
Subsequent Event [Line Items]
Share of gross profits, percentage	50.00%

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

No definition available.

Name:	us-gaap_SubsequentEventLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration