Commitments and Contingencies (Details) (VIBATIV, USD $) In Millions, unless otherwise specified	6 Months Ended
Jun. 30, 2012
Purchase Obligation
Purchases of active pharmaceutical ingredient and other raw materials	$ 4.3
Maximum
Purchase Obligation
Amount of purchase agreements for pharmaceutical ingredient and raw materials	6.2
Amount of purchase agreements for finished goods inventory	$ 4.2

Represents the amount of the purchase agreements for the active pharmaceutical ingredient and raw materials being manufactured.

No definition available.

Name:	thrx_PurchaseAgreementsAmountForPharmaceuticalIngredientAndRawMaterials
Namespace Prefix:	thrx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration