COLLABORATIVE ARRANGEMENTS (Details 6) (Development and Collaboration Arrangement, Alfa Wassermann, Velusetrag, USD $) In Millions, unless otherwise specified	0 Months Ended
Oct. 31, 2012
Information related to collaborative arrangements
Option fee funding amount	$ 10.0
Maximum
Information related to collaborative arrangements
Potential future contingent payments receivable	$ 53.5
Royalty rate, as a percentage of net sales	20.00%

Represents the option fee funding amount that the entity is entitled to receive if exercised under the collaborative arrangement.

No definition available.

Name:	thrx_CollaborativeArrangementOptionFeeFundingAmount
Namespace Prefix:	thrx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant