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DSL Service Assurance Hardware Exit (Details Textuals) (Facility Closing, USD $)
3 Months Ended
Jun. 30, 2012
Mar. 31, 2012
Facility Closing
   
Restructuring Cost and Reserve [Line Items]    
Shutdown costs $ 101,000 $ 181,000
Aggregate Estimated Restructuring And Related Costs $ 282,000 $ 282,000