Long-Term Debt (Details) (USD $)		12 Months Ended						12 Months Ended					12 Months Ended
	Mar. 31, 2013	Mar. 31, 2013 Secured Debt [Member]	Apr. 01, 2012 Secured Debt [Member]	Mar. 27, 2011 Secured Debt [Member]	Mar. 27, 2005 Secured Debt [Member]	Jun. 30, 2011 Secured Debt [Member]	Jun. 30, 2004 Secured Debt [Member]	Mar. 31, 2013 Baltimore County Economic Development Revolving Loan Fund [Member]	Apr. 01, 2012 Baltimore County Economic Development Revolving Loan Fund [Member]	Mar. 27, 2011 Baltimore County Economic Development Revolving Loan Fund [Member]	Mar. 28, 2010 Baltimore County Economic Development Revolving Loan Fund [Member]	Mar. 31, 2009 Baltimore County Economic Development Revolving Loan Fund [Member]	Apr. 01, 2012 Maryland Economic Development Corporation Note Payable [Member]	Mar. 27, 2011 Maryland Economic Development Corporation Note Payable [Member]
Debt Instrument [Line Items]
Principal amount		$ 2,550,000	$ 2,775,000				$ 4,500,000	$ 158,000	$ 182,200			$ 250,000		$ 110,400
Maturity date					Jun. 30, 2011						Apr. 01, 2019			Oct. 10, 2011
Extended maturity date			Jul. 01, 2016
Interest rate variable rate basis					LIBOR
Interest rate spread on variable rate basis (in hundredths)						2.00%	1.75%
Weighted average interest rate (in hundredths)		2.21%	2.48%	2.53%
Interest expense		55,600	63,500	64,200				3,400	3,900	4,000			1,700	6,000
Principal and interest payments								2,300						37,400
Interest rate (in hundredths)												2.00%		3.00%
Scheduled Annual Maturities of Long-Term Debt [Abstract]
2014	249,700
2015	250,200
2016	250,600
2017	1,901,200
2018	26,700
Thereafter	29,600
Total	$ 2,708,000