Significant Customer and Geographic Information (Tables)

12 Months Ended

Mar. 31, 2013

Segment Reporting [Abstract]

Schedules of concentration of risk, by risk factor

Based on direct shipments, net revenues to customers that was equal to or greater than 10% of total net revenues in any of the three fiscal years ended March 31, 2013 were as follows:

	2013		2012		2011
Wintec (global logistics provider)	19	%	20	%	—	%
Avnet (distributor)	27	%	20	%	29	%
Flextronics (sub-contract manufacturer)	*		11	%	—	%
Hon Hai (sub-contract manufacturer)	*		*		14	%

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* Less than 10% of total net revenues for period indicated.

Schedule of revenue from external customers and long-lived assets, by geographical areas

Net revenues by geographic region were as follows (in thousands):

	Fiscal Years Ended March 31,
	2013		2012		2011
United States of America*	$	79,930	$	99,214	$	81,113
Taiwan	22,684		20,950		45,489
Hong Kong	22,044		21,458		24,747
China*	2,053		4,503		9,030
Europe*	35,216		41,691		45,714
Japan	13,237		13,596		9,305
Malaysia*	4,733		8,276		8,258
Singapore*	10,399		14,011		11,808
Other Asia	4,621		5,790		9,394
Other	725		1,398		2,852
	$	195,642	$	230,887	$	247,710

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* Change in revenues was primarily due to shift in customer demand and continuing geographic changes to macro-economic conditions.