Aggregate cost of compensation made to employees under long-term retention program during the current fiscal year.

No definition available.

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

- Definition

Vesting period of cash bonus expenses to be recognized under long-term retention program.

+ References

No definition available.

+ Details

Name:	thrx_LongTermRetentionProgramCashBonusExpenseToBeRecognizedOverVestingPeriod
Namespace Prefix:	thrx_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Total amount of cash bonus paid to employees under long-term retention program during the period.

+ References

No definition available.

+ Details

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

- Definition

Aggregate potential maximum cost of compensation after the modification made to employees under the long-term retention program.

+ References

No definition available.

+ Details

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

- Details

Name:	us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Commitments and Contingencies (Details 2) (Special Long-Term Retention and Incentive Cash Awards Program, USD $) In Millions, unless otherwise specified	12 Months Ended	1 Months Ended		3 Months Ended
	Dec. 31, 2011	May 31, 2014 Cash bonus expense	May 31, 2014 Cash bonus expense	Mar. 31, 2014 Cash bonus expense
Special Long-Term Retention and Incentive Cash Awards Program
Timeframe for achievement of performance conditions	6 years
Compensation expenses related to cash bonus recognized in current year given sufficient performance conditions achieved				$ 9.1
Total cash bonus paid		9.5
Maximum remaining potential cash bonus expense associated with these cash bonus awards after the modification			$ 11.2
Vesting period			12 months