CONDENSED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenues:
Total revenues	$ 2,526,000	$ 1,313,000	$ 2,994,000	$ 7,895,000
Operating expenses:
Cost of revenue	138,000	0	223,000	1,000,000
Research and development	9,741,000	26,021,000	18,592,000	46,477,000
Selling, general and administrative	18,862,000	20,124,000	38,201,000	37,255,000
Total operating expenses	28,741,000	46,145,000	57,016,000	84,732,000
Loss from operations	(26,215,000)	(44,832,000)	(54,022,000)	(76,837,000)
Interest expense	(787,000)	(1,202,000)	(1,533,000)	(2,302,000)
Other income, net	70,000	847,000	554,000	798,000
Loss before provision for income taxes	(26,932,000)	(45,187,000)	(55,001,000)	(78,341,000)
Provision for income taxes	6,000	2,000	8,000	3,000
Net loss	$ (26,938,000)	$ (45,189,000)	$ (55,009,000)	$ (78,344,000)
Net loss per common share - basic (in dollars per share)	$ (0.19)	$ (0.45)	$ (0.40)	$ (0.79)
Net loss per common share - diluted (in dollars per share)	$ (0.19)	$ (0.45)	$ (0.40)	$ (0.79)
Shares used in computing net loss per share - basic (in shares)	145,544,372	100,040,083	138,279,945	98,617,564
Shares used in computing net loss per share - diluted (in shares)	145,544,372	100,040,083	138,279,945	98,617,564
Comprehensive loss:
Net loss	$ (26,938,000)	$ (45,189,000)	$ (55,009,000)	$ (78,344,000)
Unrealized losses on available-for-sale securities	(21,000)	11,000	(103,000)	8,000
Comprehensive loss	(26,959,000)	(45,178,000)	(55,112,000)	(78,336,000)
Product sales, net
Revenues:
Total revenues	1,564,000	0	2,014,000	0
Product Supply Revenue
Revenues:
Total revenues	952,000	0	966,000	126,000
License
Revenues:
Total revenues	10,000	3,000	14,000	5,005,000
Collaborative development revenue
Revenues:
Total revenues	$ 0	$ 1,310,000	$ 0	$ 2,764,000