Condensed Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenue:
Sales	$ 71	$ 24	$ 108	$ 43
Cost of sales	43	21	65	33
Gross profit	28	3	43	10
Operating expenses:
Research and development	226	463	522	927
Selling, general and administrative	1,427	1,831	3,472	3,735
Total operating expenses	1,653	2,294	3,994	4,662
Net operating loss	(1,625)	(2,291)	(3,951)	(4,652)
Other income (expense):
Interest income		11	2	26
Interest expense	(7)	(11)	(15)	(24)
Other income (expense)	3	2	18	(3)
Total other income (expense)	(4)	2	5	(1)
Net loss and comprehensive loss	(1,629)	(2,289)	(3,946)	(4,653)
Deemed dividend-warrant price protection-revaluation adjustment			414
Net loss attributable to common shareholders	$ (1,629)	$ (2,289)	$ (4,360)	$ (4,653)
Weighted average common shares outstanding - basic and fully diluted	2,760,875	1,227,628	2,186,089	1,201,917
Net loss per common share - basic and fully diluted	$ (0.59)	$ (1.86)	$ (1.99)	$ (3.87)