Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2013	Apr. 01, 2012
Current assets:
Trade accounts receivable, allowance for doubtful accounts	$ 1,274,700	$ 998,800
Shareholders' equity:
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)	13,362,398	13,017,172
Common stock, outstanding (in shares)	7,987,900	7,744,528
Treasury stock (in shares)	5,374,498	5,272,644