CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)	Apr. 01, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 5,379,472	$ 35,222,620
Investments	4,110,156	3,003,002
Accounts receivable, net	33,869,415	20,106,253
Inventories	41,971,770	24,245,322
Other current assets	5,463,816	5,644,154
Total current assets	90,794,629	88,221,351
Property, plant and equipment, net	45,523,946	45,747,933
Total assets	136,318,575	133,969,284
Current liabilities:
Current maturities of long-term debt	7,104,666	7,195,105
Trade accounts payable	13,885,164	6,803,769
Other accrued liabilities	10,155,251	16,057,283
Total current liabilities	31,145,081	30,056,157
Deferred income taxes	2,354,401	2,181,778
Total liabilities	33,499,482	32,237,935
Stockholders' equity	102,819,093	101,731,349
Total liabilities and stockholders' equity	$ 136,318,575	$ 133,969,284