Commitments and Contingencies (Details Textual) $ in Millions	12 Months Ended
	Mar. 31, 2018 USD ($) patent	Mar. 31, 2017 USD ($)	Mar. 31, 2016 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Operating leases, renewal option period (for periods up to 10 years)	10 years
Operating leases, rental expense | $	$ 3.2	$ 2.8	$ 2.7
Loss contingency, patents allegedly infringed, number | patent	3