Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	ATM Facility [Member]	Common Stock [Member]	Common Stock [Member] ATM Facility [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member] ATM Facility [Member]	Accumulated Deficit [Member]
Beginning balance at Dec. 31, 2021	$ 169,476		$ 4		$ 553,014		$ (383,542)
Beginning balance, shares at Dec. 31, 2021			43,652,000
Vesting of restricted stock awards and units, shares			1,000
Exercise of stock options	58				58
Exercise of stock options, shares			142,000
Issuance of common stock, net of offering costs		$ 204				$ 204
Issuance of common stock upon public offering, net of offering costs, shares				121,000
Stock-based compensation expense	11,522				11,522
Net Income (Loss)	(105,890)						(105,890)
Ending balance at Dec. 31, 2022	75,370		$ 4		564,798		(489,432)
Ending balance, shares at Dec. 31, 2022			43,916,000
Vesting of restricted stock awards and units, shares			306,000
Exercise of stock options	$ 235				235
Exercise of stock options, shares	297,604		298,000
Issuance of common stock under 2018 employee stock purchase plan	$ 86				86
Issuance of common stock under 2018 employee stock purchase plan, shares			134,000
Stock-based compensation expense	6,891				6,891
Net Income (Loss)	12,157						12,157
Ending balance at Dec. 31, 2023	$ 94,739		$ 4		$ 572,010		$ (477,275)
Ending balance, shares at Dec. 31, 2023			44,654,000