Consolidated Statements of Comprehensive Income - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 26, 2015	Dec. 27, 2014
Consolidated Statements of Comprehensive Income
Net sales	$ 298,971,665	$ 278,424,799	$ 236,308,920
Cost of sales	231,860,105	224,202,596	192,462,081
Gross profit	67,111,560	54,222,203	43,846,839
Selling, general and administrative expenses	38,542,639	35,306,651	31,344,204
Other income	(334,601)	(368,064)	(493,885)
Operating income	28,903,522	19,283,616	12,996,520
Interest expense	459,353	88,972	525,911
Income from continuing operations before income taxes	28,444,169	19,194,644	12,470,609
Income tax expense	9,406,831	6,319,375	4,000,655
Income from continuing operations	19,037,338	12,875,269	8,469,954
Discontinued operations
Gain on sale of discontinued operations, net of tax			87,036
Operating loss from discontinued operations, net of tax			(1,654,459)
Loss from discontinued operations, net of tax			(1,567,423)
Net income	19,037,338	12,875,269	6,902,531
Unrealized income (loss) on hedge activity, net of tax	12,249	(2,459)	(5,444)
Unrealized holding income (loss) on investments, net of tax	77,095	(115,482)	(17,023)
Other comprehensive income (loss)	89,344	(117,941)	(22,467)
Comprehensive income	$ 19,126,682	$ 12,757,328	$ 6,880,064
Basic income (loss) per share:
Income from continuing operations (in dollars per share)	$ 1.12	$ 0.77	$ 0.52
Loss from discontinued operations (in dollars per share)			(0.10)
Net income (in dollars per share)	1.12	0.77	0.42
Diluted income (loss) per share:
Income from continuing operations (in dollars per share)	1.11	0.76	0.50
Loss from discontinued operations (in dollars per share)			(0.09)
Net income (in dollars per share)	$ 1.11	$ 0.76	$ 0.41
Shares used in the computation of income (loss) per share:
Basic (in shares)	16,990,210	16,682,437	16,350,561
Diluted (in shares)	17,094,977	16,997,365	16,744,066