Consolidated Statements of Comprehensive Loss (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 17,097	$ (1,298)	$ (22,783)
Other comprehensive income (loss), net of tax:
Unrealized foreign currency translation adjustments	220	(1,126)	76
Reclassification of foreign currency translation adjustments included in net income (loss)	745	0	0
Unrealized loss on sale of securities	0	(4)	(4)
Total comprehensive income (loss)	$ 18,062	$ (2,428)	$ (22,711)