CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue
Total revenue	$ 2,773,000	$ 973,000	$ 6,809,000	$ 4,268,000
Operating expenses
Cost of product revenue	784,000	948,000	2,491,000	3,073,000
Research and development	1,522,000	1,307,000	4,509,000	4,426,000
Sales and marketing	1,529,000	1,698,000	4,728,000	5,436,000
General and administrative	4,313,000	3,107,000	11,218,000	9,817,000
Settlement of Tempesta Royalty License Agreement		640,000		640,000
Impairment of indefinite-lived intangible assets	0	0	0	4,000,000
Series B convertible preferred stock inducement expense			1,647,000
Series 3 warrants inducement expense			3,696,000
Total operating expenses	8,148,000	7,700,000	28,289,000	27,392,000
Loss from operations	(5,375,000)	(6,727,000)	(21,480,000)	(23,124,000)
Interest expense	(581,000)	(1,353,000)	(1,259,000)	(5,557,000)
Other income, net	194,000	29,000	190,000	49,000
Change in fair value of financial instruments	(2,104,000)	842,000	(2,491,000)	1,003,000
Loss on extinguishment of debt		(336,000)		(4,941,000)
Loss before income tax	(7,866,000)	(7,545,000)	(25,040,000)	(32,570,000)
Income tax expense		(10,000)		(10,000)
Net loss and comprehensive loss	(7,866,000)	(7,555,000)	(25,040,000)	(32,580,000)
Net loss attributable to common shareholders	$ (8,271,000)	$ (11,683,000)	$ (27,284,000)	$ (36,708,000)
Net loss per share, basic and diluted (in dollars per share)	$ (0.21)	$ (2.00)	$ (1.03)	$ (13.37)
Weighted-average common shares outstanding, basic and diluted (in shares)	40,218,324	5,841,790	26,467,423	2,746,523
Settlement of Tempesta Royalty License Agreement		$ 640,000		$ 640,000
Accretion of Series A convertible preferred
Operating expenses
Deemed dividend	$ (349,000)		$ (1,332,000)
Series B preferred stock
Operating expenses
Deemed dividend		(3,876,000)		(3,876,000)
Series C perpetual preferred stock
Operating expenses
Deemed dividend	(56,000)		(56,000)
Series 1 warrants
Operating expenses
Deemed dividend		(252,000)		(252,000)
Series 1, Series 2 and Bridge warrant
Operating expenses
Deemed dividend			(856,000)
Series B convertible preferred stock
Operating expenses
Deemed dividend				(3,876,000)
Product revenue, net
Revenue
Total revenue	$ 2,773,000	$ 973,000	$ 6,809,000	$ 4,268,000