Certain Financial Statement Information Inventories (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Mar. 31, 2013
Schedule of Inventories
Finished goods	$ 4,513	$ 7,247
Work in process	4,637	4,098
Raw materials	1,332	1,555
Inventories, total	$ 10,482	$ 12,900	[1]

[1] Amounts have been derived from the March 31, 2013 audited consolidated financial statements.