Subsequent Event (Details) - Subsequent Event [Member]	Mar. 07, 2018 shares
Teva [Member]
Subsequent Event [Line Items]
Collaborative development and license agreement termination date	Mar. 07, 2018
Teva Canada Limited [Member]
Subsequent Event [Line Items]
Number of common shares agreed to transfer and assign for cancellation	1,000,000

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