CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($)	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 30,125,500	$ 24,580,500	$ 22,148,400
Other comprehensive income, before tax:
Unrealized holding net gains arising during period		15,900	36,900
Other comprehensive income, before tax		15,900	36,900
Income tax (expense) benefit related to items of other comprehensive income:
Unrealized holding net gains/losses arising during period		(6,000)	(13,900)
Income tax expense related to items of other comprehensive income		(6,000)	(13,900)
Other comprehensive income, net of tax		9,900	23,000
Comprehensive income	$ 30,125,500	$ 24,590,400	$ 22,171,400