Insurance coverage deductibles.

No definition available.

Name:	tbra_InsuranceCoverageDeductibles
Namespace Prefix:	tbra_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Operating lease, area of office space leased.

+ References

No definition available.

+ Details

Name:	tbra_OperatingLeaseAreaOfOfficeSpaceLeased
Namespace Prefix:	tbra_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	instant

- Definition

Operating lease, tenant improvement allowance recorded.

+ References

No definition available.

+ Details

Name:	tbra_OperatingLeaseTenantImprovementAllowanceRecorded
Namespace Prefix:	tbra_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Term of the lessee's leasing arrangement renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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

- Definition

Term of the lessee's leasing arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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

- Definition

Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

- Details

Name:	us-gaap_LeaseArrangementTypeAxis=tbra_ExpiredOperatingLeasesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TitleOfIndividualAxis=us-gaap_DirectorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
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Commitments and Contingencies - Additional Information (Detail) $ in Millions	1 Months Ended	12 Months Ended
	May. 31, 2014 USD ($) ft²	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Aug. 31, 2014 ft²	Nov. 30, 2013 ft²
Purchase Commitment Excluding Longterm Commitment [Line Items]
Area of office space leased \| ft²	7,400					7,500
Operating lease, term	5 years
Agreed tenant improvement allowance	$ 0.3
Operating lease, extendable term	5 years
Rent expense		$ 0.3	$ 0.3	$ 0.2
Expired Leases [Member]
Purchase Commitment Excluding Longterm Commitment [Line Items]
Area of office space leased \| ft²					7,000
Directors [Member]
Purchase Commitment Excluding Longterm Commitment [Line Items]
Insurance coverage deductibles		2.0
Officers [Member]
Purchase Commitment Excluding Longterm Commitment [Line Items]
Insurance coverage deductibles		$ 1.5