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Organization (Details)	Mar. 31, 2013
Organization [Abstract]
Percentage of sales in US (in hundredths)	98.00%
Percentage of sales in USD (in hundredths)	99.00%

The percentage of company sales that occurs in the United States.

No definition available.

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Namespace Prefix:	tess_
Data Type:	num:percentItemType
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Period Type:	instant

The percentage of company sales made in United States Dollars.

No definition available.

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

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