Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Adjustments to reconcile net loss to net cash used for operating activities:
Net (loss) income	$ (13,065)	$ 10,857
Depreciation	2,174	2,624
Amortization of purchased intangibles	62	296
Stock-based compensation expense:
Stock options	417	602
Restricted stock units	4,799	3,112
Veloce acquisition consideration	7,140	9,255
Gain on sale of TPack	0	(19,699)
Net loss (gain) on disposals of property, equipment and other assets	16	(3)
Non-cash restructuring costs	0	26
Tax effect on other comprehensive income	(194)	0
Changes in operating assets and liabilities:
Accounts receivable	2,246	(4,474)
Inventories	(1,745)	185
Other assets	(1,994)	(1,598)
Accounts payable	(6,163)	(687)
Accrued payroll and other accrued liabilities	1,663	4,149
Veloce accrued liability	(6,383)	(24,982)
Deferred revenue	502	(671)
Net cash used for operating activities	(6,537)	(17,812)
Investing activities:
Proceeds from sales and maturities of short-term investments	682	14,185
Purchases of short-term investments	(1,320)	(2,361)
Purchase of property, equipment and other assets	(4,544)	(279)
Proceeds from the sale of TPack, net	(3,353)	(29,498)
Net cash (used for) provided by investing activities	(1,829)	41,043
Financing activities:
Proceeds from issuance of common stock	106	171
Funding of restricted stock units withheld for taxes	(924)	(2,382)
Other	(88)	(412)
Net cash used for financing activities	(906)	(2,623)
Net (decrease) increase in cash and cash equivalents	(9,272)	20,608
Cash and cash equivalents at beginning of year	71,539	19,065
Cash and cash equivalents at end of period	62,267	39,673
Supplementary cash flow disclosures:
Cash paid for income taxes	226	52
Common stock issued for Veloce merger consideration	$ 334	$ 10,037