Summary of Significant Accounting Policies (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Geographic revenue information
Total Revenue	$ 115,461us-gaap_Revenues	$ 133,105us-gaap_Revenues	$ 127,557us-gaap_Revenues
United States
Geographic revenue information
Total Revenue	48,890	58,432	57,001
Mexico
Geographic revenue information
Total Revenue	14,468	8,956	22,581
All other North America
Geographic revenue information
Total Revenue	331	196	4,370
Total North America
Geographic revenue information
Total Revenue	63,689	67,584	83,952
Russia
Geographic revenue information
Total Revenue	12,978	23,216	13,827
All other Europe
Geographic revenue information
Total Revenue	15,707	17,820	12,036
Total Europe
Geographic revenue information
Total Revenue	28,685	41,036	25,863
Asia
Geographic revenue information
Total Revenue	9,257	10,728	8,473
Australia
Geographic revenue information
Total Revenue	8,832	5,275	5,461
All other
Geographic revenue information
Total Revenue	$ 4,998	$ 8,482	$ 3,808