Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2014		Mar. 31, 2013		Mar. 31, 2012
Operating activities:
Net loss	$ (5,694)		$ (134,115)		$ (82,688)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	10,273		9,542		8,436
Amortization of purchased intangibles	482		4,643		6,754
Stock-based compensation expense:
Stock options	2,505		3,469		5,298
Restricted stock units	14,516		20,767		13,076
Warrants	0		1,289		0
Veloce acquisition consideration	42,684		66,188		60,400
Acquisition related adjustment	0		133		2,532
Gain on sale of TPack	(19,699)		0		0
Gain on sale of building	(25,815)		0		0
Net (gain) loss on disposals of property, equipment and other assets	(23)		(1,293)		10
Impairment loss (gain) on strategic investments, net	0		2,250		(7,147)
Tax effect on other comprehensive income	(40)		(989)		(123)
Restructuring charges-asset impairment	298		4,719		0
Impairment of short-term investments and marketable securities	0		1,143		0
Impairment of notes receivable and other assets	0	[1]	1,800	[1]	0	[1]
Changes in operating assets and liabilities:
Accounts receivable	(837)		(1,909)		(2,669)
Inventories	(6,049)		10,344		3,317
Other assets	3,232		(2,871)		(3,903)
Accounts payable	5,778		(622)		(4,451)
Accrued payroll and related liabilities	(671)		(82)		(2,860)
Veloce accrued liability	(63,657)		(16,537)		0
Deferred revenue	(770)		(668)		(270)
Net cash used in operating activities	(43,487)		(33,065)		(9,352)
Investing activities:
Proceeds from sales and maturities of short-term investments	44,450		42,164		101,222
Purchases of short-term investments	(18,081)		(21,633)		(103,046)
Proceeds from sale of property, equipment and other assets	70		1,800		0
Purchase of property, equipment and other assets	(5,952)		(9,045)		(13,264)
Proceeds from sale of strategic investment	1,286		7,146		0
Proceeds from the sale of TPack, net	29,498		0		0
Proceeds from sale of building, net	40,176		0		0
Purchases of strategic investment(s)	0		(500)		(4,750)
Net cash provided by (used in) investing activities	91,447		19,932		(19,838)
Financing activities:
Proceeds from issuance of common stock	11,619		8,873		6,736
Funding of restricted stock units withheld for taxes	(6,550)		(3,121)		(2,864)
Repurchase of common stock	0		(653)		(20,852)
Funding of structured stock repurchase agreements	0		0		(10,000)
Payment of contingent consideration	0		(485)		0
Other	(555)		(481)		(167)
Net cash provided by (used in) financing activities	4,514		4,133		(27,147)
Net increase (decrease) in cash and cash equivalents	52,474		(9,000)		(56,337)
Cash and cash equivalents at beginning of year	19,065		28,065		84,402
Cash and cash equivalents at end of year	71,539		19,065		28,065
Supplementary cash flow disclosures:
Cash paid for income taxes	870		987		692
Shares issued for Veloce merger consideration	$ 57,348		$ 16,565		$ 0

[1] During the fiscal year ended March 31, 2013, the Company wrote-off $1.5 million of notes receivable due from an investee and $0.3 million related to a prepaid intellectual property license from this investee. The Company also impaired the related equity investment of $2.3 million in this investee - see * above.