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Capitalized Software Development Costs
6 Months Ended
Sep. 30, 2011
Capitalized Software Development Costs [Abstract] 
Capitalized Software Development Costs
9. Capitalized Software Development Costs

Net capitalized software development costs for NetScout's nGenius Service Delivery Manager product totaled $153 thousand and $255 thousand at September 30, 2011 and March 31, 2011, respectively. This product was released on June 29, 2010, and is being amortized on a straight-line basis over two years. Amortization included as cost of product revenue related to this product was $51 thousand, $102 thousand, $51 thousand and $102 thousand for the three and six months ended September 30, 2011 and 2010, respectively.