CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenue
Total revenue	$ 869,000	$ 1,590,000
Operating expenses
Cost of product revenue	676,000	865,000
Research and development	1,582,000	1,421,000
Sales and marketing	1,469,000	1,565,000
General and administrative	3,149,000	3,514,000
Series B convertible preferred stock inducement expense	1,647,000
Total operating expenses	8,523,000	7,365,000
Loss from operations	(7,654,000)	(5,775,000)
Interest expense	(199,000)	(547,000)
Other income (expense)	(82,000)	6,000
Change in fair value of financial instruments	(1,000)	(46,000)
Loss on extinguishment of debt		(1,942,000)
Loss before income tax expense	(7,936,000)	(8,304,000)
Income tax expense
Net loss	(7,936,000)	(8,304,000)
Net loss attributable to common shareholders	$ (8,416,000)	$ (8,304,000)
Net loss per share, basic and diluted (in dollars per share)	$ (0.56)	$ (16.84)
Weighted-average common shares outstanding, basic and diluted (in shares)	15,141,906	493,202
Accretion of Series A convertible preferred
Operating expenses
Deemed dividend	$ (480,000)
Product revenue, net
Revenue
Total revenue	$ 869,000	$ 1,590,000