Income Taxes Components of Income Tax Expense and (Benefit) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011
Current tax provision (benefit):
Federal	$ 0	$ (563)	$ 157
State	(10)	45	88
Foreign	218	158	280
Current tax provision (benefit) - Total	208	(360)	525
Deferred tax provision (benefit):
Federal	445	876	(1,142)
State	188	241	(323)
Foreign	3	238	(301)
Deferred tax provision (benefit) - Total	636	1,355	(1,766)
Income tax expense (benefit)	$ 844	$ 995	$ (1,241)