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COMMITMENTS AND CONTINGENCIES (Details) (USD $) | 12 Months Ended |
--- | --- | ---
Mar. 31, 2013 Defendant | Mar. 31, 2012 | Mar. 31, 2011 | May 19, 2009 Defendant
Legal Proceedings [Abstract] |  |  |  |
Number of defendants infringing patents |  |  |  | 4
Number of defendants entered into agreement | 3 |  |  |
Rent expense | $ 3,500,000 | $ 2,400,000 | $ 2,100,000 |
Future Minimum Lease Payments [Abstract] |  |  |  |
Year ended March 31, 2014 | 3,347,000 |  |  |
2015 | 1,974,000 |  |  |
2016 | 844,000 |  |  |
2017 | 439,000 |  |  |
2018 and thereafter | 205,000 |  |  |
Operating Leases, Future Minimum Payments Due | $ 6,809,000 |  |  |

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