CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	3 Months Ended
	Apr. 01, 2017	Mar. 26, 2016
Cash flows from operating activities:
Net income	$ 1,862,985	$ 3,759,353
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	838,351	872,358
Deferred income taxes	172,623	(300,350)
Stock-based compensation expense	288,607	227,386
Gain on sale of property, plant and equipment, net	(7,738)	(300)
Changes in operating assets and liabilities	(25,002,928)	(9,382,120)
Net cash used in operating activities	(21,848,100)	(4,823,673)
Cash flows from investing activities:
Additions to property, plant and equipment	(539,046)	(399,324)
Proceeds from sale of property, plant and equipment	8,650	300
Purchases of investments	(1,088,737)	(23,560)
Net cash used in investing activities	(1,619,133)	(422,584)
Cash flows from financing activities:
Repayments of current maturities long-term debt	(166,669)	(166,667)
Payment of cash dividends	(5,724,469)	(5,572,859)
Treasury stock purchased	(522,687)	(161,769)
Proceeds from exercise of stock options	37,910	12,400
Net cash used in financing activities	(6,375,915)	(5,888,895)
Change in cash and cash equivalents	(29,843,148)	(11,135,152)
Cash and cash equivalents, beginning of period	35,222,620	17,247,891
Cash and cash equivalents, end of period	$ 5,379,472	$ 6,112,739