Variable Interest Entity (Details) - WBA [Member] - Variable Interest Entity, Primary Beneficiary $ in Thousands	6 Months Ended
Dec. 30, 2016 USD ($)
Variable Interest Entity [Line Items]
Variable interest entity, cash and cash equivalents	$ 558
Variable interest entity, accounts receivable	234
Variable interest entity, other current liabilities	3
Variable interest entity, financial support given	$ 9

Variable Interest Entity, Consolidated, Carrying Amount, Accounts Receivable

No definition available.

Name:	trr_VariableInterestEntityConsolidatedCarryingAmountAccountsReceivable
Namespace Prefix:	trr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Variable Interest Entity, Consolidated, Carrying Amount, Cash And Cash Equivalents

+ References

No definition available.

+ Details

Name:	trr_VariableInterestEntityConsolidatedCarryingAmountCashAndCashEquivalents
Namespace Prefix:	trr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Variable Interest Entity, Consolidated, Carrying Amounts, Other Current Liabilities

+ References

No definition available.

+ Details

Name:	trr_VariableInterestEntityConsolidatedCarryingAmountsOtherCurrentLiabilities
Namespace Prefix:	trr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of financial or other support the reporting entity has provided (explicitly or implicitly) to the Variable Interest Entity (VIE) that it was not previously contractually required to provide or that the reporting entity intends to provide, including, for example, situations in which the reporting entity assisted the VIE in obtaining another type of support.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 5A
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=64801991&loc=SL6759159-111685

+ Details

Name:	us-gaap_VariableInterestEntityFinancialOrOtherSupportAmount
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

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

- Details

Name:	us-gaap_CounterpartyNameAxis=trr_WBAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis=us-gaap_VariableInterestEntityPrimaryBeneficiaryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: