Consolidated Statements of Cash Flows (USD $)	12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011
Cash flows from operating activities:
Net income	$ 6,425,876	$ 11,832,985	$ 790,671
Adjustments to reconcile net income to net cash from operating activities:
Depreciation	3,412,891	2,921,624	3,030,790
Treasury stock issued for legal settlement			2,184,000
Amortization and write-off of debt issuance costs	282,129	392,518	1,224,954
Provision for losses on doubtful receivables	62,618	30,034	151,915
Deferred income taxes	1,059,169	(825,451)
Stock-based compensation expense	402,363	294,195	451,203
Gain on sale of property, plant, and equipment, net	(289,632)	(353,007)	(191,108)
Changes in operating assets and liabilities
Accounts receivable	(2,904,202)	3,228,527	(2,514,944)
Inventories	(187,324)	5,825,931	(907,713)
Other current assets	(131,485)	574,922	(228,056)
Trade accounts payable	3,952,411	(9,487,890)	9,852,532
Other current liabilities	1,377,903	(2,005,044)	625,599
Net cash from operating activities	13,462,717	12,429,344	14,469,843
Cash flows from investing activities:
Proceeds from sale of property, plant, and equipment	1,268,167	4,239,153	579,400
Additions to property, plant and equipment	(6,237,152)	(13,159,255)	(2,766,344)
Proceeds from sale of investments	0	0	304,755
Purchases of investments	(27,338)	(1,963,156)	(12,852)
Decrease in other assets	25,736	29,878	8,746
Net cash from investing activities	(4,970,587)	(10,853,380)	(1,886,295)
Cash flows from financing activities:
Proceeds from revolving line of credit and other long-term debt	63,374,736	295,080,663	121,630,314
Repayments of revolving line of credit and other long-term debt	(67,814,067)	(296,428,325)	(132,821,867)
Debt issuance costs	(358,975)	(376,488)	(2,383,794)
Proceeds from exercise of stock options	141,397	100,409	48,585
Net cash from financing activities	(4,656,909)	(1,623,741)	(13,526,762)
Change in cash and cash equivalents	3,835,221	(47,777)	(943,214)
Cash and cash equivalents, beginning of year	59,056	106,833	1,050,047
Cash and cash equivalents, end of year	3,894,277	59,056	106,833
Cash paid (received) during the year for:
Interest, net	305,895	792,810	1,363,223
Income taxes, net	$ 2,072,401	$ 1,264,905	$ (50,133)