CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 7,143,000	$ 5,530,700	$ 14,103,400	$ 11,081,500
Other comprehensive income (loss), before tax:
Unrealized holding net gains (losses) arising during period		9,000		16,600
Other comprehensive income (loss), before tax		9,000		16,600
Income tax (expense) benefit related to items of other comprehensive income:
Unrealized holding net gains/losses arising during period		(3,500)		(6,300)
Income tax (expense) benefit related to items of other comprehensive income		(3,500)		(6,300)
Other comprehensive income (loss), net of tax		5,500		10,300
Comprehensive income	$ 7,143,000	$ 5,536,200	$ 14,103,400	$ 11,091,800