Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Operating Loss Carryforwards [Line Items]
Excess tax benefits from stock-based compensation	$ 0	$ 0	$ 13
Valuation allowance	25,452
Increase in valuation allowance	5,740	11,802
Unrecognized tax benefits	227	$ 212	$ 210	$ 188
Domestic Country
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	55,807
Exercise of NQSOs	3,586
Tax credit carryforwards	1,475
State And Local Jurisdiction
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	42,181
Exercise of NQSOs	3,941
Tax credit carryforwards	$ 769
Minimum
Operating Loss Carryforwards [Line Items]
Examination period for state income tax returns	3 years
Maximum
Operating Loss Carryforwards [Line Items]
Examination period for state income tax returns	5 years