CONDENSED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
Net Sales	$ 19	$ 19
Cost of sales	12	19
Gross profit	7
Operating expenses:
Research and development	464	634
Selling, general and administrative	1,904	2,028
Total operating expenses	2,368	2,662
Net operating loss	(2,361)	(2,662)
Other income (expense):
Interest income	15	6
Interest expense	(13)	(22)
Other income (expense)	(5)	13
Total other income (expense)	(3)	(3)
Net loss and comprehensive loss	$ (2,364)	$ (2,665)
Loss per share attributable to common shareholders, basic and diluted (in dollars per share)	$ (0.10)	$ (0.16)
Weighted average common shares outstanding - basic and fully diluted (in shares)	23,518,400	16,496,385