CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
Amortization of capitalized fees paid to a related party	$ 3,455	$ 3,233	$ 10,367	$ 7,611

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