Property and Equipment - Major classifications of property and equipment (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 9,196	$ 9,644
Less: accumulated depreciation	(7,627)	(8,334)
Property and equipment, net	1,569	1,310
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	1,119	1,124
Computer software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	3,391	2,749
Furniture, fixtures and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 4,686	$ 5,771