Income Taxes (Details 4) (USD $)	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Change in net deferred income tax asset (liability)
Balance at the beginning of the period	$ 8,248,000
Deferred income taxes related to continuing operations (1)	2,084,000
Deferred income taxes related to other comprehensive income	(1,287,000)
Foreign currency translation	(1,655,000)
Balance at the end of the period	7,390,000	8,248,000
Tax expense (benefit) allocated to other comprehensive income		(300,000)
Valuation Allowance for Deferred Tax Assets
Annual activities included in the deferred tax valuation allowance
Balance at the beginning of the period	189,276,000	169,270,000	149,306,000
Charge to costs and expenses	(19,900,000)	(21,515,000)	(23,977,000)
Deductions	(1,782,000)	(1,509,000)	(4,013,000)
Balance at the end of the period	$ 167,594,000	$ 189,276,000	$ 169,270,000