CONSOLIDATED STATEMENTS OF STOCKHOLDERS' DEFICIT - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Capital in Excess of Par Value	Accumulated Deficit	Accumulated Other Comprehensive Income
Balance at Mar. 31, 2013	$ (82,363)	$ 2,431	$ 427,611	$ (518,597)	$ 6,192
Balance, shares at Mar. 31, 2013		243,080
Net income (loss)	(21,474)			(21,474)
Foreign currency translation adjustments	679				679
Net unrealized gain (loss) on revaluation of long-term intercompany balance, net of tax	(251)				(251)
Shares issued under employee stock purchase plan	3,456	$ 32	3,424
Shares issued under employee stock purchase plan, shares		3,220
Shares issued under employee stock incentive plans, net	(906)	$ 41	(947)
Shares issued under employee stock incentive plans, net, shares		4,110
Share-based compensation expense	13,459		13,459
Balance at Mar. 31, 2014	(87,400)	$ 2,504	443,547	(540,071)	6,620
Balance, shares at Mar. 31, 2014		250,410
Net income (loss)	16,760			16,760
Foreign currency translation adjustments	(3,490)				(3,490)
Net unrealized gain (loss) on revaluation of long-term intercompany balance, net of tax	750				750
Shares issued under employee stock purchase plan	2,893	$ 28	2,865
Shares issued under employee stock purchase plan, shares		2,790
Shares issued under employee stock incentive plans, net	(1,534)	$ 50	(1,584)
Shares issued under employee stock incentive plans, net, shares		5,008
Share-based compensation expense	11,583		11,583
Balance at Mar. 31, 2015	$ (60,438)	$ 2,582	456,411	(523,311)	3,880
Balance, shares at Mar. 31, 2015	258,208	258,208
Net income (loss)	$ (74,683)			(74,683)
Foreign currency translation adjustments	21				21
Net unrealized gain (loss) on revaluation of long-term intercompany balance, net of tax	(57)				(57)
Shares issued under employee stock purchase plan	2,180	$ 33	2,147
Shares issued under employee stock purchase plan, shares		3,273
Shares issued under employee stock incentive plans, net	(2,878)	$ 47	(2,925)
Shares issued under employee stock incentive plans, net, shares		4,728
Share-based compensation expense	8,916		8,916
Balance at Mar. 31, 2016	$ (126,939)	$ 2,662	$ 464,549	$ (597,994)	$ 3,844
Balance, shares at Mar. 31, 2016	266,209	266,209