GOODWILL AND PURCHASED INTANGIBLE ASSETS (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Jun. 30, 2011 years	Mar. 31, 2011 years
Finite-Lived Intangible Assets [Abstract]
Goodwill	$ 14,005	$ 14,005
Finite-Lived Intangible Assets, Gross	4,732	4,732
Finite-Lived Intangible Assets, Accumulated Amortization	(4,072)	(3,876)
Finite-Lived Intangible Assets, Net	660	856
Technology [Member]
Finite-Lived Intangible Assets [Abstract]
Finite-Lived Intangible Assets, Gross	3,000	3,000
Finite-Lived Intangible Assets, Accumulated Amortization	(2,938)	(2,812)
Finite-Lived Intangible Assets, Net	62	188
Finite-Lived Intangible Assets, Useful Life	6	6
Customer Relationships [Member]
Finite-Lived Intangible Assets [Abstract]
Finite-Lived Intangible Assets, Gross	1,705	1,705
Finite-Lived Intangible Assets, Accumulated Amortization	(1,113)	(1,044)
Finite-Lived Intangible Assets, Net	592	661
Finite-Lived Intangible Assets, Useful Life	8	8
OEM Relationships [Member]
Finite-Lived Intangible Assets [Abstract]
Finite-Lived Intangible Assets, Gross	27	27
Finite-Lived Intangible Assets, Accumulated Amortization	(21)	(20)
Finite-Lived Intangible Assets, Net	$ 6	$ 7
Finite-Lived Intangible Assets, Useful Life	7	7