Consolidated Balance Sheets (Parenthetical) - USD ($)	Mar. 29, 2020	Mar. 31, 2019
Current assets:
Trade accounts receivable, allowance for doubtful accounts	$ 3,288,800	$ 2,137,900
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)	14,354,368	14,190,027
Common stock, outstanding (in shares)	8,577,549	8,468,529
Treasury stock (in shares)	5,776,819	5,721,498