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ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Details) - USD ($)	3 Months Ended		12 Months Ended		33 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023	Dec. 31, 2021	Mar. 31, 2024	Dec. 31, 2020
Accounting Policies [Line Items]
Cash, cash equivalents, and marketable securities	$ 39,900,000		$ 39,500,000		$ 39,900,000
Milestone payment received	(4,906,876)	$ 9,013,304
Gross proceeds from sale of common stock	2,290,244	0
Revenue recognized under "ERC"			$ 191,463	$ 191,199
Receivables under "ERC"	366,551			$ 738,778	$ 366,551	$ 738,778
Grant income	0	0
Research and development	11,101,013	7,661,519
Comprehensive loss	9,722,185	7,778,524
Net unrealized gain (loss) on marketable securities	$ 71,888	$ (10,258)
Antidilutive securities	15,670,163	7,971,557
June 2021 ATM Program
Accounting Policies [Line Items]
Number of common stock shares issued	447,221				3,423,375
Average price	$ 5.33				$ 5.33
Gross proceeds from sale of common stock	$ 2,300,000				$ 19,000,000.0
Commercialization and Distribution Agreement with Nippon Shinyaku Co, Limited, Japan
Accounting Policies [Line Items]
Milestone payment received	$ 10,000,000.0

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