Name:	tess_DebtInstrumentApplicableRateEventOfDefaultAdditionalIncrease
Namespace Prefix:	tess_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Consecutive period for limit on share repurchase amount under terms of debt agreement.

No definition available.

Name:	tess_DebtInstrumentConsecutivePeriodForLimitOnShareRepurchaseAmount
Namespace Prefix:	tess_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Threshold for borrowings which triggers financial covenant requirements under the debt agreement.

No definition available.

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

The amount of excess availability under the credit facility.

No definition available.

Name:	tess_DebtInstrumentExcessAvailability
Namespace Prefix:	tess_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Number of financial covenants.

No definition available.

Name:	tess_DebtInstrumentFinancialCovenantNumber
Namespace Prefix:	tess_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

Maximum amount of dividends and repurchase of shares during period under terms of debt agreement.

No definition available.

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

Maximum amount of dividends and repurchase of shares per quarter during period under terms of debt agreement.

No definition available.

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

Maximum amount of shares that may be repurchased in specified consecutive period in connection with the payment or satisfaction of tax withholding obligations of participants under equity compensation plans, assuming that no default exists under terms of debt agreement.

No definition available.

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

Minimum average excess availability threshold required for paying dividends or effecting redemptions under terms of debt

No definition available.

Name:	tess_DebtInstrumentMinimumAverageExcessAvailabilityThreshold
Namespace Prefix:	tess_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Minimum borrowing availability threshold required for paying dividends or effecting redemptions under terms of debt agreement.

No definition available.

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

Minimum borrowing availability threshold in certain more limited circumstances required for paying dividends or effecting redemptions under terms of debt agreement.

No definition available.

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

Minimum daily excess availability threshold required for paying dividends or effecting redemptions under terms of debt agreement.

No definition available.

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

Debt Instrument, Minimum Excess Availability Threshold, Period

No definition available.

Name:	tess_DebtInstrumentMinimumExcessAvailabilityThresholdPeriod
Namespace Prefix:	tess_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

The threshold amount of excess availability.

No definition available.

Name:	tess_DebtInstrumentThresholdExcessAvailability
Namespace Prefix:	tess_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Represents the threshold fixed charge coverage ratio under the debt instrument covenant.

No definition available.

Name:	tess_DebtInstrumentThresholdFixedChargeCoverageRatio
Namespace Prefix:	tess_
Data Type:	xbrli:pureItemType
Balance Type:	na
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.
Namespace Prefix:	tess_
Data Type:	num:percentItemType
Balance Type:	na
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
Namespace Prefix:	tess_
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
Namespace Prefix:	tess_
Data Type:	xbrli:durationItemType
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

The percentage of maximum amount of credit facility used in calculating excess availability.

No definition available.

Name:	tess_LineOfCreditFacilityExcessAvailabilityPercentageOfMaximumAmountOfCreditFacility
Namespace Prefix:	tess_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Represents the floor percentage under the debt instrument covenant.

No definition available.

Name:	tess_LineOfCreditFacilityFloorPercentage
Namespace Prefix:	tess_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

No definition available.

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

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

Amount of interest capitalized during the period.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Section 50
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Name:	us-gaap_InterestCostsCapitalized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Amount of the cost of borrowed funds accounted for as interest expense for debt.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Name:	us-gaap_LineOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Average amount borrowed under the credit facility during the period.

No definition available.

Name:	us-gaap_LineOfCreditFacilityAverageOutstandingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The effective interest rate at the end of the reporting period.

Name:	us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

The effective interest rate during the reporting period.

Name:	us-gaap_LineOfCreditFacilityInterestRateDuringPeriod
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
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 amount borrowed under the credit facility at any time during the period.

No definition available.

Name:	us-gaap_LineOfCreditFacilityMaximumAmountOutstandingDuringPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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.

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

Name:	us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

No definition available.

Name:	us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Name:	us-gaap_DebtInstrumentAxis=tess_RevolvingCreditFacility2016Member
Namespace Prefix:
Data Type:	na
Balance Type:
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Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
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Balance Type:
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Name:	us-gaap_DebtInstrumentAxis=tess_RevolvingCreditFacility2020Member
Namespace Prefix:
Data Type:	na
Balance Type:
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Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
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Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix:
Data Type:	na
Balance Type:
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Name:	srt_StatementScenarioAxis=tess_DebtInstrumentCovenantIfFixedCoverageRatioIsLessThan1.10Member
Namespace Prefix:
Data Type:	na
Balance Type:
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Name:	srt_StatementScenarioAxis=tess_DebtInstrumentCovenantIfFixedCoverageRatioIsGreaterThanOrEqualTo1.10Member
Namespace Prefix:
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Balance Type:
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Namespace Prefix:
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