CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	6 Months Ended
	Jun. 25, 2016	Jun. 27, 2015
Cash flows from operating activities:
Net income	$ 12,055,525	$ 6,279,783
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	1,735,341	1,797,816
Deferred income taxes	(199,994)	(50,457)
Stock-based compensation expense	473,220	366,123
(Gain) loss on sale of property, plant and equipment, net	27,347	(163,953)
Changes in operating assets and liabilities	(15,545,046)	(14,102,798)
Net cash used in operating activities	(1,453,607)	(5,873,486)
Cash flows from investing activities:
Additions to property, plant and equipment	(1,332,440)	(2,700,403)
Proceeds from sale of property, plant, and equipment	300	403,055
Proceeds from sale of investments		1,029,000
Purchases of investments	(40,348)	(63,652)
Net cash from investing activities	(1,372,488)	(1,332,000)
Cash flows from financing activities:
Proceeds from revolving line of credit and other long-term debt		38,570,153
Repayments of revolving line of credit and other long-term debt	(333,334)	(38,903,487)
Payments of cash dividends	(6,168,514)	(1,328,558)
Treasury stock purchased	(269,177)	(157,308)
Proceeds from exercise of stock options	70,826	473,883
Net cash used in financing activities	(6,700,199)	(1,345,317)
Change in cash and cash equivalents	(9,526,294)	(8,550,803)
Cash and cash equivalents, beginning of period	17,247,891	11,636,988
Cash and cash equivalents, end of period	$ 7,721,597	$ 3,086,185