CONDENSED CONSOLIDATED BALANCE SHEETS (USD $)	Jun. 28, 2014	Dec. 28, 2013
Current assets:
Cash and cash equivalents	$ 12,549,318	$ 3,894,277
Investments	2,914,660	2,865,287
Accounts receivable, net	21,867,794	21,623,319
Inventories	24,590,163	32,496,255
Deferred income taxes	1,866,907	1,844,648
Other current assets	1,125,906	3,199,571
Total current assets	64,914,748	65,923,357
Property, plant and equipment, at cost	95,602,834	95,541,208
Less, Accumulated depreciation and amortization	49,244,651	49,153,369
Property, plant and equipment, net	46,358,183	46,387,839
Other assets	1,067,195	1,219,655
Total assets	112,340,126	113,530,851
Current liabilities:
Current maturities of long-term debt	666,668	666,668
Trade accounts payable	12,712,063	15,888,955
Other accrued liabilities	10,901,268	11,787,833
Total current liabilities	24,279,999	28,343,456
Long-term debt	8,666,664	8,999,998
Deferred income taxes	1,749,220	2,078,366
Other long-term liabilities	53,641	28,864
Total liabilities	34,749,524	39,450,684
Stockholders' equity	77,590,602	74,080,167
Total liabilities and stockholders' equity	$ 112,340,126	$ 113,530,851