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) income	$ (2,144)	$ 705
Income from discontinued operations	0	(11,138)
Loss from continuing operations	(2,144)	(10,433)
Adjustments to reconcile loss from continuing operations to net cash used in operating activities
Restructuring, severance and other charges	1,555	6,034
Payments and settlements for restructuring	(5,938)	(998)
Asset impairments and related charges	208	0
Depreciation	1,391	2,114
Amortization	2,220	3,376
Share-based compensation	831	1,989
Changes in operating assets and liabilities:
Accounts receivable	(1,171)	3,510
Inventories	2,773	(3,039)
Accounts payable	(4,101)	(1,935)
Deferred revenue	(8,242)	(8,881)
Accrued liabilities	(8,892)	4,239
Income taxes receivable	(274)	(763)
Other charges, net	12	(378)
Net cash used in operating activities from continuing operations	(21,772)	(5,165)
Net cash used in operating activities from discontinued operations	0	(27,132)
Net cash used in operating activities	(21,772)	(32,297)
Investing activities
Proceed from sale of TSG	0	59,470
Proceeds from sale of marketable securities	4,347	2,036
Additional investments in corporate-owned life insurance policies and marketable securities	(42)	(68)
Capital expenditures	(2,405)	(1,464)
Net cash provided by investing activities from continuing operations	1,900	59,974
Net cash provided by investing activities from discontinued operations	0	0
Net cash provided by investing activities	1,900	59,974
Financing activities
Principal payments under long-term obligations	(399)	(551)
Exercise of employee stock options	67	122
Repurchase of common shares to satisfy employee tax withholding	(134)	(1,094)
Repurchase of common shares	0	(6,617)
Net cash used in financing activities from continuing operations	(466)	(8,140)
Net cash used in financing activities from discontinued operations	0	(78)
Net cash used in financing activities	(466)	(8,218)
Effect of exchange rate changes on cash	78	(151)
Cash flows (used in) provided by continuing operations	(20,260)	46,518
Cash flows used in discontinued operations	0	(27,210)
Net (decrease) increase in cash and cash equivalents	(20,260)	19,308
Cash and cash equivalents at beginning of period	97,587	74,354
Cash and cash equivalents at end of period	$ 77,327	$ 93,662