CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)	Jul. 01, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 24,827,651	$ 35,222,620
Investments	4,152,226	3,003,002
Accounts receivable, net	33,445,865	20,106,253
Inventories	30,691,847	24,245,322
Other current assets	4,931,456	5,644,154
Total current assets	98,049,045	88,221,351
Property, plant and equipment, net	41,481,422	45,747,933
Total assets	139,530,467	133,969,284
Current liabilities:
Current maturities of long-term debt	7,014,229	7,195,105
Trade accounts payable	10,936,923	6,803,769
Other accrued liabilities	10,685,014	16,057,283
Total current liabilities	28,636,166	30,056,157
Deferred income taxes	2,010,954	2,181,778
Total liabilities	30,647,120	32,237,935
Stockholders' equity	108,883,347	101,731,349
Total liabilities and stockholders' equity	$ 139,530,467	$ 133,969,284