Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Sep. 30, 2012		Sep. 30, 2011
Operating activities:
Net loss	$ (44,947)		$ (8,029)
Adjustments to reconcile net loss to net cash used for operating activities:
Depreciation	4,905		3,840
Amortization of purchased intangibles	2,609		4,096
Stock-based compensation expense:
Stock options	2,172		2,579
Restricted stock units	13,151		4,723
Warrants	1,289
Veloce accrued liability	4,650
Acquisition related adjustment	(133)		(2,267)
Net loss on disposals of property	3		10
Tax effect on other comprehensive income	(565)
Changes in operating assets and liabilities:
Accounts receivable	8,391		(8,086)
Inventories	4,807		7,834
Other assets	(2,735)		(7,159)
Accounts payable	(4,293)		(5,908)
Accrued payroll and other accrued liabilities	(1,819)		55
Veloce accrued liability	(14,814)
Deferred revenue	(918)		(560)
Net cash used for operating activities	(28,247)		(8,872)
Investing activities:
Proceeds from sales and maturities of short-term investments	24,868		87,746
Purchases of short-term investments	(15,361)		(67,735)
Purchase of property, equipment and other assets	(7,606)		(9,757)
Proceeds from sale of strategic equity investment	7,146
Purchases of strategic equity investment	(500)		(2,500)
Funding of note receivable			(1,000)
Net cash provided by investing activities	8,547		6,754
Financing activities:
Proceeds from issuance of common stock	5,359		2,952
Funding of restricted stock units withheld for taxes	(313)		(2,441)
Repurchase of common stock	(654)		(20,852)
Funding of structured stock repurchase agreements			(10,000)
Payment of contingent consideration	(485)
Other	(280)		(160)
Net cash provided by (used for) financing activities	3,627		(30,501)
Net decrease in cash and cash equivalents	(16,073)		(32,619)
Cash and cash equivalents at beginning of year	28,065	[1]	84,402
Cash and cash equivalents at end of year	11,992		51,783
Supplementary cash flow disclosures:
Income taxes	197		22
Shares issued for Veloce merger consideration	$ 14,842

[1] Note: Amounts have been derived from the March 31, 2012 audited consolidated financial statements.