CONSOLIDATED STATEMENTS OF CASH FLOWS - Supplemental Dislcosures - USD ($)	6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017
SUPPLEMENTAL DISCLOSURES:
Cash paid for interest	$ 1,404,800	$ 980,300
Cash paid for income taxes	2,192,700	5,654,000
Reconciliation of cash, cash equivalents and restricted cash:
Cash and cash equivalents	1,232,900	1,071,900
Restricted cash	105,000	30,000
Total cash, cash equivalents and restricted cash	$ 1,337,900	$ 1,101,900