Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Sep. 30, 2013		Sep. 30, 2012
Operating activities:
Net loss	$ (21,526)		$ (44,947)
Adjustments to reconcile net loss to net cash used for operating activities:
Depreciation	5,283		4,905
Amortization of purchased intangibles	358		2,609
Stock-based compensation expense:
Stock options	1,336		2,172
Restricted stock units	6,212		13,151
Warrants	0		1,289
Veloce accrued liability	39,739		4,650
Acquisition related adjustment	0		(133)
Gain on sale of TPack	(19,699)		0
Net loss on disposals of property, equipment and other assets	27		3
Non-cash restructuring costs	298		0
Tax effect on other comprehensive income	0		(565)
Changes in operating assets and liabilities:
Accounts receivable	(2,366)		8,391
Inventories	105		4,807
Other assets	(159)		(2,735)
Accounts payable	(1,943)		(4,293)
Accrued payroll and other accrued liabilities	1,810		(1,819)
Veloce accrued liability	(44,240)		(14,814)
Deferred revenue	(594)		(918)
Net cash used for operating activities	(35,359)		(28,247)
Investing activities:
Proceeds from sales and maturities of short-term investments	21,303		24,868
Purchases of short-term investments	(8,177)		(15,361)
Proceeds from sale of property, equipment and other assets	20		0
Purchase of property, equipment and other assets	(2,023)		(7,606)
Proceeds from sale of strategic equity investment	1,286		7,146
Purchases of strategic equity investment	0		(500)
Proceeds from the sale of TPack, net	(29,498)		0
Net cash provided by investing activities	41,907		8,547
Financing activities:
Proceeds from issuance of common stock	4,439		5,359
Proceeds from employee stock purchase plan	2,497		0
Funding of restricted stock units withheld for taxes	(4,079)		(313)
Repurchase of common stock	0		(654)
Payment of contingent consideration	0		(485)
Other	(562)		(280)
Net cash provided by financing activities	2,295		3,627
Net increase (decrease) in cash and cash equivalents	8,843		(16,073)
Cash and cash equivalents at beginning of year	19,065	[1]	28,065
Cash and cash equivalents at end of period	27,908		11,992
Supplementary cash flow disclosures:
Income taxes	379		197
Common stock issued for Veloce merger consideration	$ 29,041		$ 14,842

[1] Amounts have been derived from the March 31, 2013 audited consolidated financial statements.