CONDENSED CONSOLIDATED BALANCE SHEETS (USD $)	Sep. 27, 2014	Dec. 28, 2013
Current assets:
Cash and cash equivalents	$ 11,443,509	$ 3,894,277
Investments	2,900,193	2,865,287
Accounts receivable, net	23,040,051	21,623,319
Inventories	25,262,531	32,496,255
Deferred income taxes	1,681,221	1,844,648
Other current assets	2,548,298	3,199,571
Total current assets	66,875,803	65,923,357
Property, plant and equipment, at cost	95,174,090	95,541,208
Less, Accumulated depreciation and amortization	49,009,093	49,153,369
Property, plant and equipment, net	46,164,997	46,387,839
Other assets	990,965	1,219,655
Total assets	114,031,765	113,530,851
Current liabilities:
Current maturities of long-term debt	666,668	666,668
Trade accounts payable	12,185,751	15,888,955
Other accrued liabilities	10,491,667	11,787,833
Total current liabilities	23,344,086	28,343,456
Long-term debt	8,499,997	8,999,998
Deferred income taxes	2,348,092	2,078,366
Other long-term liabilities	19,471	28,864
Total liabilities	34,211,646	39,450,684
Stockholders' equity	79,820,119	74,080,167
Total liabilities and stockholders' equity	$ 114,031,765	$ 113,530,851