EQUITY COMPENSATION PLANS AND SHARE-BASED COMPENSATION (Details) (USD $)	12 Months Ended					12 Months Ended				12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2014 2005 Equity Incentive Plan [Member]	Mar. 31, 2014 1992 Outside Directors Stock Option Plan [Member]	Mar. 31, 2014 Stock Options [Member]	Mar. 31, 2013 Stock Options [Member]	Mar. 31, 2012 Stock Options [Member]	Mar. 31, 2011 Stock Options [Member]	Mar. 31, 2014 Stock Options [Member] Employees [Member]	Mar. 31, 2014 Stock Options [Member] Non-Employee Directors [Member]	Mar. 31, 2014 Stock Options [Member] Non-Employee Directors [Member] 1992 Outside Directors Stock Option Plan [Member]	Mar. 31, 2014 Cost of Revenues [Member]	Mar. 31, 2013 Cost of Revenues [Member]	Mar. 31, 2012 Cost of Revenues [Member]	Mar. 31, 2014 Research and Development [Member]	Mar. 31, 2013 Research and Development [Member]	Mar. 31, 2012 Research and Development [Member]	Mar. 31, 2014 Sales and Marketing [Member]	Mar. 31, 2013 Sales and Marketing [Member]	Mar. 31, 2012 Sales and Marketing [Member]	Mar. 31, 2014 General and Administrative [Member]	Mar. 31, 2013 General and Administrative [Member]	Mar. 31, 2012 General and Administrative [Member]
Equity Compensation Plan and Allocation of Share-based Compensation [Line Items]
Maximum shares authorized for issuance (in shares)				6,786,000	250,000
Shares available for future issuance (in shares)				1,018,000	0
Term of grant						10 years						10 years
Award vesting period										4 years	1 year	1 year
Stock options outstanding (in shares)						2,000	72,000	282,000	406,000			0
Share-based compensation expense before income taxes	$ 7,643,000	$ 7,086,000	$ 5,683,000										$ 1,105,000	$ 921,000	$ 918,000	$ 1,138,000	$ 1,150,000	$ 866,000	$ 2,146,000	$ 2,506,000	$ 1,877,000	$ 3,254,000	$ 2,509,000	$ 2,022,000
Income tax benefit	(2,605,000)	(2,557,000)	(2,001,000)
Total share-based compensation expense after income taxes	5,038,000	4,529,000	3,682,000
Net impact of share-based compensation on [Abstract]
Basic net income per share (in dollars per share)	$ 0.23	$ 0.21	$ 0.17
Diluted net income per share (in dollars per share)	$ 0.22	$ 0.20	$ 0.16
Capitalized share-based compensation costs	137,000	151,000	139,000
Excess tax benefits classified as financing cash inflow	$ 2,164,000	$ 2,683,000	$ 862,000