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COMMITMENTS AND CONTINGENCIES (Details) (USD $)	12 Months Ended
COMMITMENTS AND CONTINGENCIES (Details) (USD $)	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