Consolidated Balance Sheets (Parenthetical) - USD ($)	Mar. 26, 2017	Mar. 27, 2016
Assets, Current [Abstract]
Trade accounts receivable, allowance for doubtful accounts	$ 782,200	$ 841,400
Stockholders' Equity Attributable to Parent [Abstract]
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, authorized (in shares)	500,000	500,000
Preferred stock, issued (in shares)	0	0
Preferred stock, outstanding (in shares)	0	0
Common stock, par value (in dollars shares)	$ 0.01	$ 0.01
Common stock, authorized (in shares)	15,000,000	15,000,000
Common stock, issued (in shares)	14,048,392	13,970,394
Common stock, outstanding (in shares)	8,337,669	8,272,124
Treasury stock (in shares)	5,710,723	5,698,270