CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
Amortization of capitalized fees paid to a related party	$ 3,456	$ 1,780

Represents the amortization of capitalized fees paid to a related party.

No definition available.

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