Commitments and Contingencies (Details Textual) - USD ($)	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013	Jun. 06, 2013
Commitments and Contingencies Disclosure [Abstract]
Operating leases, renewal option period (for periods up to 10 years)	10 years
Operating leases, rental expense	$ 2,500,000	$ 2,500,000	$ 2,400,000
Asset retirement obligation, current	35,000	0
Asset retirement obligation, noncurrent	$ 400,000	$ 400,000
Wage and Hour Putative Class Action Lawsuit [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Loss contingency, proposed settlement amount				$ 1,500,000