CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenue:
Sale of products, net	$ 16,600,244	$ 12,279,979	$ 8,521,998
Cost of goods sold (exclusive of depreciation shown separately below):
Products	17,308,156	12,709,678	9,102,560
Gross loss	(707,912)	(429,699)	(580,562)
Operating expenses:
Research and development (including equity based compensation)	3,366,468	2,340,958	1,571,365
General and administrative (including equity based compensation)	7,116,535	6,193,269	7,760,127
Sales and marketing (including equity based compensation)	1,161,952	1,581,741	1,357,518
Depreciation	353,435	326,124	319,699
Amortization	593,562	516,056	454,612
Total operating expenses	12,591,952	10,958,148	11,463,321
Operating loss	(13,299,864)	(11,387,847)	(12,043,883)
Other income (expense):
Warrant liability (loss) gain - net	(157,809)	29,615	144,550
Settlement Proceeds	0	0	1,000,000
Loss on the disposition of machinery and equipment	0	0	(15,130)
Gain (loss) on investment	346,180	(202,338)	(95,684)
Unrealized loss on short-term investment securities	(3,618)	0	0
Interest income	115,098	16,885	31,198
Interest expense	(29,104)	(37,745)	(52,982)
Total other income (expense)	270,747	(193,583)	1,011,952
Loss before income taxes	(13,029,117)	(11,581,430)	(11,031,931)
Income taxes	0	0	0
Net loss	$ (13,029,117)	$ (11,581,430)	$ (11,031,931)
Loss per common share - basic and diluted (in dollars per share)	$ (0.13)	$ (0.15)	$ (0.16)
Common shares used in basic and diluted earnings per share calculation (in shares)	101,161,380	79,842,773	68,143,284