CONSOLIDATED STATEMENTS OF CASH FLOWS - Supplemental Disclosures - USD ($)	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
SUPPLEMENTAL DISCLOSURES:
Cash paid for interest	$ 1,705,600	$ 2,497,000	$ 2,176,100
Cash paid for income taxes	11,122,300	6,727,600	13,585,200
Non-cash landlord leasehold improvements	2,139,000
Reconciliation of cash, cash equivalents and restricted cash:
Cash and cash equivalents	25,130,300	2,496,000	1,073,200
Restricted cash	50,000	80,000	90,000
Total cash, cash equivalents and restricted cash	$ 25,180,300	$ 2,576,000	$ 1,163,200