Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Operating Loss Carryforwards [Line Items]
Valuation allowance	$ 76,400	$ 73,014
Undistributed earnings of foreign subsidiaries	700	1,800
Significant change in unrecognized tax benefits reasonably possible, lower end	0
Significant change in unrecognized tax benefits reasonably possible, upper end	100
Interest and penalty expense (benefit), (less than $.1 million for year ended March 31, 2012)	300	200	$ 100
Interest and penalties accrued	800	$ 1,100
Federal and State Deferred Tax Assets [Member]
Operating Loss Carryforwards [Line Items]
Valuation allowance	76,100
Deferred Tax Assets in Hong Kong [Member]
Operating Loss Carryforwards [Line Items]
Valuation allowance	300
Federal [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	170,300
Operating loss carryforwards, excess income tax benefit related to share-based compensation	4,200
Foreign Tax Authority [Member] | Hong Kong [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	300
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 143,700