Condensed Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)	Total
Balance at Dec. 31, 2020	$ 2	$ 242,780	$ (160,731)	$ (112)	$ 81,939
Balance (in shares) at Dec. 31, 2020	22,493,661
Increase (Decrease) in Stockholders' Equity
Issuance of common stock	$ 1	74,386			74,387
Issuance of common stock (in shares)	3,450,000
Exercise of options for common stock issued under Equity Incentive Plan		67			67
Exercise of options for common stock issued under Equity Incentive Plan (in shares)	37,400
Exercise of options for common stock not yet issued		(1)			(1)
Exercise of options for common stock not yet issued (in shares)	(465)
Restricted Stock Units released for common stock issued under Equity Incentive Plan (in shares)	1,988
Exercise of warrants of common stock		69			69
Exercise of warrants of common stock (in shares)	27,855
Stock-based compensation expense		2,981			2,981
Net loss			(24,179)		(24,179)
Other comprehensive income (loss)				(42)	(42)
Balance at Mar. 31, 2021	$ 3	320,282	(184,910)	(154)	135,221
Balance (in shares) at Mar. 31, 2021	26,010,439
Balance at Dec. 31, 2020	$ 2	242,780	(160,731)	(112)	81,939
Balance (in shares) at Dec. 31, 2020	22,493,661
Increase (Decrease) in Stockholders' Equity
Net loss					(78,425)
Balance at Sep. 30, 2021	$ 3	326,108	(239,156)	(254)	86,701
Balance (in shares) at Sep. 30, 2021	26,214,399
Balance at Mar. 31, 2021	$ 3	320,282	(184,910)	(154)	135,221
Balance (in shares) at Mar. 31, 2021	26,010,439
Increase (Decrease) in Stockholders' Equity
Secondary public offering issuance costs		35			35
Issuance of common stock for options exercised in prior periods under Equity Incentive Plan		1			1
Issuance of common stock for options exercised in prior periods under Equity Incentive Plan (in shares)	465
Exercise of options for common stock issued under Equity Incentive Plan		341			341
Exercise of options for common stock issued under Equity Incentive Plan (in shares)	82,668
Exercise of options for common stock not yet issued		(1)			(1)
Exercise of options for common stock not yet issued (in shares)	(920)
Restricted Stock Units released for common stock issued under Equity Incentive Plan (in shares)	37,884
Stock-based compensation expense		2,702			2,702
Net loss			(25,828)		(25,828)
Other comprehensive income (loss)				(31)	(31)
Balance at Jun. 30, 2021	$ 3	323,360	(210,738)	(185)	112,440
Balance (in shares) at Jun. 30, 2021	26,130,536
Increase (Decrease) in Stockholders' Equity
Issuance of common stock for options exercised in prior periods under Equity Incentive Plan		1			1
Issuance of common stock for options exercised in prior periods under Equity Incentive Plan (in shares)	920
Exercise of options for common stock issued under Equity Incentive Plan		103			103
Exercise of options for common stock issued under Equity Incentive Plan (in shares)	70,368
Exercise of options for common stock not yet issued		(1)			(1)
Exercise of options for common stock not yet issued (in shares)	(115)
Restricted Stock Units released for common stock issued under Equity Incentive Plan (in shares)	12,690
Stock-based compensation expense		2,645			2,645
Net loss			(28,418)		(28,418)
Other comprehensive income (loss)				(69)	(69)
Balance at Sep. 30, 2021	$ 3	326,108	(239,156)	(254)	86,701
Balance (in shares) at Sep. 30, 2021	26,214,399
Balance at Dec. 31, 2021	$ 3	328,958	(266,315)	(107)	62,539
Balance (in shares) at Dec. 31, 2021	26,215,514
Increase (Decrease) in Stockholders' Equity
Restricted Stock Units released for common stock issued under Equity Incentive Plan (in shares)	21,417
Restricted Stock Units released for common stock not yet issued (in shares)	(21,417)
Stock-based compensation expense		2,077			2,077
Issuance of options in-lieu of bonus		441			441
Net loss			(23,121)		(23,121)
Other comprehensive income (loss)				27	27
Balance at Mar. 31, 2022	$ 3	331,476	(289,436)	(80)	41,963
Balance (in shares) at Mar. 31, 2022	26,215,514
Balance at Dec. 31, 2021	$ 3	328,958	(266,315)	(107)	$ 62,539
Balance (in shares) at Dec. 31, 2021	26,215,514
Increase (Decrease) in Stockholders' Equity
Exercise of options for common stock issued under Equity Incentive Plan (in shares)					47,602
Net loss					$ (68,079)
Balance at Sep. 30, 2022	$ 5	343,995	(334,394)	23	9,629
Balance (in shares) at Sep. 30, 2022	48,058,956
Balance at Mar. 31, 2022	$ 3	331,476	(289,436)	(80)	41,963
Balance (in shares) at Mar. 31, 2022	26,215,514
Increase (Decrease) in Stockholders' Equity
Issuance of common stock, pre-funded warrants, and common warrants sold for cash, net of issuance costs	$ 2	5,966			5,968
Issuance of common stock, pre-funded warrants, and common warrants sold for cash, net of issuance costs (in shares)	20,000,000
Exercise of prefunded warrants for common stock		1,417			1,417
Exercise of prefunded warrants for common stock (in shares)	1,750,000
Exercise of prefunded warrants for common stock not yet issued (in shares)	(1,750,000)
Issuance of common stock for Restricted Stock released in prior periods under Equity Incentive Plan (in shares)	21,417
Restricted Stock Units released for common stock issued under Equity Incentive Plan (in shares)	16,593
Stock-based compensation expense		2,231			2,231
Net loss			(25,857)		(25,857)
Other comprehensive income (loss)				86	86
Balance at Jun. 30, 2022	$ 5	341,090	(315,293)	6	25,808
Balance (in shares) at Jun. 30, 2022	46,253,524
Increase (Decrease) in Stockholders' Equity
Issuance of common stock for pre-funded warrants exercised in prior periods (in shares)	1,750,000
Exercise of options for common stock issued under Equity Incentive Plan		49			49
Exercise of options for common stock issued under Equity Incentive Plan (in shares)	47,602
Restricted Stock Units released for common stock issued under Equity Incentive Plan (in shares)	7,830
Stock-based compensation expense		2,856			2,856
Net loss			(19,101)		(19,101)
Other comprehensive income (loss)				17	17
Balance at Sep. 30, 2022	$ 5	$ 343,995	$ (334,394)	$ 23	$ 9,629
Balance (in shares) at Sep. 30, 2022	48,058,956