CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Net revenue
Total net revenue	$ 6,795,000	$ 10,086,000
Cost of net revenue	2,329,000	3,931,000
Gross profit	4,466,000	6,155,000
Operating expenses
Research and development	3,989,000	4,182,000
Selling, general and administrative	4,028,000	4,016,000
Impairment of goodwill		420,000
Total operating expenses	8,017,000	8,618,000
Loss from operations	(3,551,000)	(2,463,000)
Interest expense	(243,000)	(220,000)
Other income, net	14,000	103,000
Net loss	(3,780,000)	(2,580,000)
Deemed dividend for warrant exercise price adjustment	(392,000)
Net loss attributable to common stockholders	$ (4,172,000)	$ (2,580,000)
Net loss per share attributable to common stockholders
Basic and diluted	$ (1.32)	$ (1.19)
Shares used in computing net loss per share
Basic and diluted	3,167	2,165
Product
Net revenue
Total net revenue	$ 5,933,000	$ 9,377,000
Royalty and Other
Net revenue
Total net revenue	$ 862,000	$ 709,000