Commitments and Contingencies (Details) (Maximum, VIBATIV, USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2012
Maximum \| VIBATIV
Purchase Obligation
Amount of purchase agreements for pharmaceutical ingredient and raw materials	$ 6.2
Amount of purchase agreements for 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