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Cash and Cash Equivalents
12 Months Ended
Mar. 31, 2013
Cash and Cash Equivalents, at Carrying Value [Abstract]  
Cash and Cash Equivalents
Cash and Cash Equivalents
At March 31, 2013 and 2012, the Company had cash and cash equivalents of $105,999 and $134,444, respectively. Cash and cash equivalents consist of cash, money market funds and short-term U.S. Treasury securities with original maturities of less than 90 days. The money market fund in which the Company holds a portion of its cash invests in only investment grade money market instruments from a variety of industries, and therefore bears relatively low market risk.