Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Net revenues
Total net revenues	$ 3,337	$ 1,395	$ 6,536	$ 4,186
Cost of sales
Total cost of sales	1,352	645	2,750	2,017
Gross profit	1,985	750	3,786	2,169
Operating costs and expenses
Research and development	2,698	2,956	9,235	13,072
General and administrative	6,264	16,044	22,080	48,299
Sales and marketing	1,606	4,988	7,324	12,922
Restructuring and other charges			2,536
Total operating costs and expenses	10,568	23,988	41,175	74,293
Operating loss	(8,583)	(23,238)	(37,389)	(72,124)
Other income (expenses)
Change in fair value of common stock warrant liability	1,503		4,444
Interest (expense) income, net	(58)	27	(135)	126
Other income, net	57	228	282	650
Net loss	$ (7,081)	$ (22,983)	$ (32,798)	$ (71,348)
Net loss per share, basic and diluted	$ (0.18)	$ (0.87)	$ (0.89)	$ (2.94)
Weighted average shares outstanding, basic and diluted	38,761,141	26,405,307	36,743,864	24,273,774
Product [Member]
Net revenues
Total net revenues	$ 1,156	$ 839	$ 2,528	$ 1,640
Cost of sales
Total cost of sales	210	315	825	930
Service [Member]
Net revenues
Total net revenues	2,181	556	4,008	2,546
Cost of sales
Total cost of sales	$ 1,142	$ 330	$ 1,925	$ 1,087