Consolidated Income Statements - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
CONSOLIDATED INCOME STATEMENTS
Sales	$ 57,300,281	$ 53,284,166	$ 55,350,702
Cost of Sales	53,598,390	46,531,648	46,412,848
Gross Profit	3,701,891	6,752,518	8,937,854
Selling, General and Administrative	23,303,409	21,120,901	19,078,867
Research and Product Development	6,321,400	5,840,346	4,961,313
Operating Income (Loss)	(25,922,918)	(20,208,729)	(15,102,326)
Interest and Investment Income, net	892	810,340	681,876
Foreign Currency Gain (Loss)	742
Income (Loss) Before Income Taxes	(25,921,284)	(19,398,389)	(14,420,450)
Income Tax Expense	0	404,527	0
Net Income (Loss)	$ (25,921,284)	$ (19,802,916)	$ (14,420,450)
Basic Earnings (Loss) per Share	$ (0.51)	$ (0.39)	$ (0.29)
Diluted Earnings (Loss) per Share	$ (0.51)	$ (0.39)	$ (0.29)