Collaborative Arrangements (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2014	Mar. 31, 2013
Information related to collaborative arrangements
Net revenue from collaborative arrangements	$ (780)	$ 1,344
GSK
Information related to collaborative arrangements
Net revenue from collaborative arrangements	(780)	1,322
Other
Information related to collaborative arrangements
Net revenue from collaborative arrangements	$ 0	$ 22

Revenue earned under collaborative arrangements from upfront payments and contingent payments along with revenue net of amortization expense from related intangible assets earned during the period including amounts from a related party.

No definition available.

Name:	thrx_CollaborativeArrangementsAndRoyaltyRevenue
Namespace Prefix:	thrx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration