GOODWILL AND PURCHASED INTANGIBLE ASSETS (Details) (USD $)	6 Months Ended	12 Months Ended
	Sep. 30, 2011 years	Mar. 31, 2011 years
Finite-Lived Intangible Assets [Abstract]
Goodwill	$ 14,000,000	$ 14,000,000
Finite-Lived Intangible Assets, Gross	4,732,000	4,732,000
Finite-Lived Intangible Assets, Accumulated Amortization	(4,206,000)	(3,876,000)
Finite-Lived Intangible Assets, Net	526,000	856,000
Technology [Member]
Finite-Lived Intangible Assets [Abstract]
Finite-Lived Intangible Assets, Gross	3,000,000	3,000,000
Finite-Lived Intangible Assets, Accumulated Amortization	(3,000,000)	(2,812,000)
Finite-Lived Intangible Assets, Net	0	188,000
Finite-Lived Intangible Assets, Useful Life	6	6
Customer Relationships [Member]
Finite-Lived Intangible Assets [Abstract]
Finite-Lived Intangible Assets, Gross	1,705,000	1,705,000
Finite-Lived Intangible Assets, Accumulated Amortization	(1,184,000)	(1,044,000)
Finite-Lived Intangible Assets, Net	521,000	661,000
Finite-Lived Intangible Assets, Useful Life	8	8
OEM Relationships [Member]
Finite-Lived Intangible Assets [Abstract]
Finite-Lived Intangible Assets, Gross	27,000	27,000
Finite-Lived Intangible Assets, Accumulated Amortization	(22,000)	(20,000)
Finite-Lived Intangible Assets, Net	$ 5,000	$ 7,000
Finite-Lived Intangible Assets, Useful Life	7	7