CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Operating expenses:
Research and development	$ 103,520,000	$ 60,393,000
General and administrative	23,029,000	18,457,000
Increase in contingent consideration (inclusive of related party amounts of $0 and $2,739, respectively)		6,683,000
Total operating expenses	126,549,000	85,533,000
Loss from operations	(126,549,000)	(85,533,000)
Other income (expense):
Interest expense	(3,506,000)	(3,553,000)
Other income, net	280,000	2,559,000
Net loss before income tax	(129,775,000)	(86,527,000)
Income tax benefit	0	0
Net loss	(129,775,000)	(86,527,000)
Other comprehensive income (expense):
Other comprehensive income (loss) (net of tax expense of $0 for each of the periods ending December 31, 2020 and 2019)	(14,000)	19,000
Total other comprehensive income (loss)	(14,000)	19,000
Comprehensive loss	$ (129,789,000)	$ (86,508,000)
Net loss per share attributable to common stockholders, basic and diluted	$ (3.61)	$ (6.86)
Weighted-average shares of common stock, basic and diluted	35,996,901	12,618,413