UNAUDITED CONSOLIDATED BALANCE SHEETS - Parenthetical - USD ($)	Jun. 27, 2021	Dec. 27, 2020
Statement of Financial Position [Abstract]
Allowance for credit losses receivable, current	$ 521,001	$ 492,087
Preferred stock, par value (in USD per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	500,000	500,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in USD per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	19,500,000	19,500,000
Common stock, shares issued (in shares)	10,343,340	10,328,379
Common stock, shares outstanding (in shares)	10,343,340	10,328,379
Treasury stock, shares outstanding (in shares)	1,235	1,235
Deferred finance costs, line of credit arrangements, net	$ 230,670	$ 268,076