Income Tax (Details Textual) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Income Tax (Textual) [Abstract]
Recognized federal research and development tax credits	$ 1,196	$ 1,461	$ 1,055
State research and development tax credits	251	145	165
Qualified production activities deduction under Section 199 of the Internal Revenue Code	3,189	9,032	10,025
Accrued interest related to income tax	$ 80	$ 118
Period within which the company does not anticipate total unrecognized tax benefits to change	within the next twelve months