Description of Business and Basis of Presentation (Details)	Jun. 30, 2013
Description of Business and Basis of Presentation [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.

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