CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	6 Months Ended
	Jul. 01, 2017	Jun. 25, 2016
Cash flows from operating activities:
Net Income	$ 8,164,865	$ 12,055,525
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	1,678,306	1,735,341
Deferred income taxes	(170,823)	(199,994)
Stock-based compensation expense	640,917	473,220
Loss on sale of property, plant and equipment, net	151,559	27,347
Changes in operating assets and liabilities	(15,205,030)	(15,545,046)
Net cash used in operating activities	(4,740,206)	(1,453,607)
Cash flows from investing activities:
Additions to property, plant and equipment	(1,622,234)	(1,332,440)
Proceeds from sale of property, plant and equipment	4,231,340	300
Purchases of investments	(1,120,828)	(40,348)
Net cash provided by (used in) investing activities	1,488,278	(1,372,488)
Cash flows from financing activities:
Repayments of revolving line of credit and other long-term debt	(333,336)	(333,334)
Payment of cash dividends	(6,324,928)	(6,168,514)
Treasury stock purchased	(522,687)	(269,177)
Proceeds from exercise of stock options	37,910	70,826
Net cash used in financing activities	(7,143,041)	(6,700,199)
Change in cash and cash equivalents	(10,394,969)	(9,526,294)
Cash and cash equivalents, beginning of period	35,222,620	17,247,891
Cash and cash equivalents, end of period	$ 24,827,651	$ 7,721,597