Condensed Consolidated Statement of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit
Beginning balance (in shares) at Dec. 31, 2020		40,707,047
Beginning balance at Dec. 31, 2020	$ 155,747	$ 4	$ 218,001	$ 0	$ (62,258)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)		55,761
Issuance of common stock upon exercise    of stock options	148		148
Issuance of common stock under stock purchase plan (in shares)		19,377
Issuance of common stock under stock purchase plan	118		118
Issuance of common stock upon public offering, net of issuance costs (in shares)		1,677,118
Issuance of common stock upon public offering, net of issuance costs	14,716	$ 1	14,715
Issuance of common stock upon conversion of convertible note payable (in shares)		961,538
Issuance of common stock upon conversion of convertible note payable	1,500		1,500
Stock-based compensation expense	2,380		2,380
Unrealized gain (loss) on marketable securities	(1)			(1)
Net income (loss)	(15,561)				(15,561)
Ending balance (in shares) at Mar. 31, 2021		43,420,841
Ending balance at Mar. 31, 2021	159,047	$ 5	236,862	(1)	(77,819)
Beginning balance (in shares) at Dec. 31, 2020		40,707,047
Beginning balance at Dec. 31, 2020	155,747	$ 4	218,001	0	(62,258)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Unrealized gain (loss) on marketable securities	(9)
Net income (loss)	(34,542)
Ending balance (in shares) at Jun. 30, 2021		44,335,609
Ending balance at Jun. 30, 2021	148,089	$ 5	244,893	(9)	(96,800)
Beginning balance (in shares) at Mar. 31, 2021		43,420,841
Beginning balance at Mar. 31, 2021	159,047	$ 5	236,862	(1)	(77,819)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)		358,126
Issuance of common stock upon exercise    of stock options	1,486		1,486
Issuance of common stock upon public offering, net of issuance costs (in shares)		556,642
Issuance of common stock upon public offering, net of issuance costs	4,266		4,266
Stock-based compensation expense	2,279		2,279
Unrealized gain (loss) on marketable securities	(8)			(8)
Net income (loss)	(18,981)				(18,981)
Ending balance (in shares) at Jun. 30, 2021		44,335,609
Ending balance at Jun. 30, 2021	$ 148,089	$ 5	244,893	(9)	(96,800)
Beginning balance (in shares) at Dec. 31, 2021	46,958,776	46,958,776
Beginning balance at Dec. 31, 2021	$ 118,900	$ 5	259,859	(221)	(140,743)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)		208
Issuance of common stock upon exercise    of stock options	0
Issuance of common stock under stock purchase plan (in shares)		51,329
Issuance of common stock under stock purchase plan	157		157
Issuance of common stock upon public offering, net of issuance costs (in shares)		7,337,251
Issuance of common stock upon public offering, net of issuance costs	20,556	$ 1	20,555
Stock-based compensation expense	1,865		1,865
Unrealized gain (loss) on marketable securities	(690)			(690)
Net income (loss)	6,199				6,199
Ending balance (in shares) at Mar. 31, 2022		54,347,564
Ending balance at Mar. 31, 2022	$ 146,987	$ 6	282,436	(911)	(134,544)
Beginning balance (in shares) at Dec. 31, 2021	46,958,776	46,958,776
Beginning balance at Dec. 31, 2021	$ 118,900	$ 5	259,859	(221)	(140,743)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Unrealized gain (loss) on marketable securities	(949)
Net income (loss)	$ (19,014)
Ending balance (in shares) at Jun. 30, 2022	55,384,868	55,384,868
Ending balance at Jun. 30, 2022	$ 125,716	$ 6	286,637	(1,170)	(159,757)
Beginning balance (in shares) at Mar. 31, 2022		54,347,564
Beginning balance at Mar. 31, 2022	146,987	$ 6	282,436	(911)	(134,544)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of stock options (in shares)		9,135
Issuance of common stock upon exercise    of stock options	11		11
Issuance of common stock under stock purchase plan (in shares)		2,234
Issuance of common stock under stock purchase plan	7		7
Issuance of common stock upon public offering, net of issuance costs (in shares)		1,025,935
Issuance of common stock upon public offering, net of issuance costs	2,110		2,110
Stock-based compensation expense	2,073		2,073
Unrealized gain (loss) on marketable securities	(259)			(259)
Net income (loss)	$ (25,213)				(25,213)
Ending balance (in shares) at Jun. 30, 2022	55,384,868	55,384,868
Ending balance at Jun. 30, 2022	$ 125,716	$ 6	$ 286,637	$ (1,170)	$ (159,757)