QUARTERLY RESULTS OF OPERATIONS (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
QUARTERLY RESULTS OF OPERATIONS
Sales	$ 13,389,786	$ 12,814,815	$ 13,452,517	$ 13,627,048	$ 14,132,637	$ 14,378,528	$ 12,955,576	$ 13,883,961	$ 53,284,166	$ 55,350,702	$ 54,188,444
Cost of Sales	11,401,603	11,234,934	11,962,989	11,932,122	12,076,489	11,875,122	10,889,619	11,571,618	46,531,648	46,412,848	45,643,231
Gross Profit	1,988,183	1,579,881	1,489,528	1,694,926	2,056,148	2,503,406	2,065,957	2,312,343	6,752,518	8,937,854	8,545,213
Selling, General and Administrative	6,049,663	5,070,127	5,014,370	4,986,741	6,089,606	3,827,904	3,835,596	5,325,761	21,120,901	19,078,867	18,320,720
Research and Product Development	1,200,729	1,261,863	2,063,324	1,314,430	2,029,736	1,246,727	885,259	799,591	5,840,346	4,961,313	7,783,594
Operating Income (Loss)	(5,262,209)	(4,752,109)	(5,588,166)	(4,606,245)	(6,063,194)	(2,571,225)	(2,654,898)	(3,813,009)	(20,208,729)	(15,102,326)	(17,559,101)
Interest and Investment Income, net	207,911	188,847	227,020	186,562	293,238	156,672	118,151	113,815	810,340	681,876	386,257
Interest Expense											4,154,313
Income (Loss) Before Income Taxes	(5,054,298)	(4,563,262)	(5,361,146)	(4,419,683)	(5,769,956)	(2,414,553)	(2,536,747)	(3,699,194)	(19,398,389)	(14,420,450)	(21,327,157)
Income Tax Expense				404,527					404,527	0	0
Net Income (Loss)	$ (5,054,298)	$ (4,563,262)	$ (5,361,146)	$ (4,824,210)	$ (5,769,956)	$ (2,414,553)	$ (2,536,747)	$ (3,699,194)	$ (19,802,916)	$ (14,420,450)	$ (21,327,157)
Basic And Diluted Earnings (Loss) Per Share (in dollars per share)	$ (0.10)	$ (0.09)	$ (0.11)	$ (0.10)	$ (0.12)	$ (0.05)	$ (0.05)	$ (0.07)