CONDENSED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Income Statement [Abstract]
Royalty revenues	$ 165	$ 141	$ 532	$ 332
Costs and expenses:
Research and development	9,640	8,022	27,140	25,094
Selling, general and administrative	3,126	2,939	9,471	10,318
Total operating expenses	12,766	10,961	36,611	35,412
Loss from operations	(12,601)	(10,820)	(36,079)	(35,080)
Other income (expense), net:
Interest income, net	741	1,068	2,472	3,061
Other income (expense), net	5	21	(37)	(85)
Total other income, net	746	1,089	2,435	2,976
Net loss	(11,855)	(9,731)	(33,644)	(32,104)
Preferred stock dividend payable on Series A Convertible Preferred Stock	(6)	(6)	(18)	(18)
Net loss attributable to common stockholders	$ (11,861)	$ (9,737)	$ (33,662)	$ (32,122)
Net loss per common share - basic	$ (0.25)	$ (0.22)	$ (0.74)	$ (0.72)
Net loss per common share - diluted	$ (0.25)	$ (0.22)	$ (0.74)	$ (0.72)
Weighted-average shares outstanding - basic	46,865	44,677	45,461	44,677
Weighted-average shares outstanding - diluted	46,865	44,677	45,461	44,677

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

Name:	us-gaap_EarningsPerShareBasic
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.