Financing Arrangements (Details Textual) (USD $)			12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2012 Bank of America, N.A. [Member] Line of Credit [Member]	May 05, 2009 Bank of America, N.A. [Member] Line of Credit [Member]	Mar. 31, 2013 Minimum [Member]	Mar. 31, 2013 Maximum [Member]
Capital Leases of Lessee [Abstract]
Assets recorded under capital leases	$ 2,627,000	$ 2,500,000
Accumulated depreciation related to assets recorded under capital leases	2,073,000	920,000
Interest rate on capital lease					3.30%	35.60%
Line of credit, maximum borrowing capacity				50,000,000
Line of credit, maximum borrowing capacity including accordion provision				75,000,000
Line of credit, additional borrowings available, accordion provision				25,000,000
Expense of unamortized deferred financing fees			$ 400,000