CONSOLIDATED STATEMENTS OF CASH FLOWS - Supplemental Disclosures - USD ($)	12 Months Ended
	Dec. 26, 2020	Dec. 28, 2019	Dec. 29, 2018
SUPPLEMENTAL DISCLOSURES:
Cash paid for interest	$ 1,738,400	$ 1,705,600	$ 2,497,000
Cash paid for income taxes	9,552,500	11,122,300	6,727,600
Non-cash landlord leasehold improvements		2,139,000
Reconciliation of cash, cash equivalents and restricted cash:
Cash and cash equivalents	6,659,000	25,130,300	2,496,000
Restricted cash	25,000	50,000	80,000
Total cash, cash equivalents and restricted cash	$ 6,684,000	$ 25,180,300	$ 2,576,000