Name:	tess_DebtInstrumentApplicableRateEventOfDefaultAdditionalIncrease
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Percentage points added to the reference rate to compute the variable rate on the debt instrument when average availability is greater or equal to specified threshold amount.

No definition available.

Name:	tess_DebtInstrumentBasisSpreadOnVariableRateAverageAvailabilityGreaterThanOrEqual
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Data Type:	num:percentItemType
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Period Type:	duration

Percentage points added to the reference rate to compute the variable rate on the debt instrument when average availability is less than specified threshold amount.

No definition available.

Name:	tess_DebtInstrumentBasisSpreadOnVariableRateAverageAvailabilityLessThan
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Data Type:	num:percentItemType
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Percentage points that may be added to the reference rate to compute the variable rate on the debt instrument at the option of the lender upon event of default.

No definition available.

Name:	tess_DebtInstrumentBasisSpreadOnVariableRateEventOfDefault
Namespace Prefix:	tess_
Data Type:	num:percentItemType
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The threshold amount for determining basis spread on variable rate.

No definition available.

Name:	tess_DebtInstrumentBasisSpreadOnVariableRateThresholdAmount
Namespace Prefix:	tess_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Maximum borrowing availability amount required for maintaining fixed charge coverage ratio, as determined in accordance with the agreement.

No definition available.

Name:	tess_DebtInstrumentBorrowingAvailabilityThresholdFixedChargeCoverageRatio
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Percentage of eligible accounts used in determining borrowing base as defined under the terms of the credit facility.

No definition available.

Name:	tess_LineOfCreditFacilityBorrowingBaseAsPercentageOfEligibleReceivables.
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Data Type:	num:percentItemType
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Period Type:	instant

Amount used in determining borrowing base with regard to inventory under the terms of the credit facility.

No definition available.

Name:	tess_LineOfCreditFacilityBorrowingBaseFormulaAmount
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Inventory age threshold used in determining borrowing base under the terms of the credit facility.

No definition available.

Name:	tess_LineOfCreditFacilityBorrowingBaseFormulaInventoryAge
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Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

The fee, expressed as a percentage of the line of credit facility per annum, on the unused portion of the line of credit facility.

No definition available.

Name:	tess_LineOfCreditFacilityCommitmentFeePercentageUnused
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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

The aggregate borrowing capacity under the credit facility, consisting of the maximum borrowing capacity plus the contingent increase, if any one or more of the existing banks or new banks agree to provide such increased commitment amount.

No definition available.

Name:	tess_LineOfCreditFacilityContingentIncreaseAggregateMaximumBorrowingCapacity
Namespace Prefix:	tess_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Percentage from which the variable rate reserve percentage is subtracted from in determining denominator for calculating rate per annum.

No definition available.

Name:	tess_LineOfCreditFacilityRateCalculationDenominator
Namespace Prefix:	tess_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

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.

No definition available.

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

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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Period Type:	instant

Name:	us-gaap_DebtInstrumentAxis=tess_RevolvingCreditFacility2016Member
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Name:	srt_RangeAxis=srt_MinimumMember
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Name:	srt_RangeAxis=srt_MaximumMember
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Name:	us-gaap_VariableRateAxis=us-gaap_BaseRateMember
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Data Type:	na
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Name:	us-gaap_VariableRateAxis=us-gaap_EurodollarMember
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Name:	us-gaap_CreditFacilityAxis=us-gaap_StandbyLettersOfCreditMember
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