Long-term Liabilities - Narratives (Detail) - USD ($)	1 Months Ended				12 Months Ended
	Jan. 31, 2015	Mar. 31, 2011	Sep. 30, 2009	Mar. 31, 2009	May. 29, 2015	May. 30, 2014
Debt Instrument [Line Items]
Construction line of credit, fixed interest rate				4.25%
Equipment note, remaining balance					$ 4,944,233	$ 5,314,212
Treasury stock to be purchased, shares	440,875
Compensation expense					$ 134,876	$ 143,695
Equipment Note [Member]
Debt Instrument [Line Items]
Equipment note, term		15 years	10 years
Equipment note, interest rate		3.52%	4.25%
Equipment note, face amount		$ 2,900,000	$ 4,000,000
Equipment note, remaining balance		$ 3,532,700
Stock Buyback Liabilities [Member]
Debt Instrument [Line Items]
Equipment note, term	5 years
Equipment note, interest rate	3.30%
Equipment note, face amount	$ 2,204,375