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ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Details) - USD ($) |  |  |  | 1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended | 39 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Oct. 16, 2024 | Sep. 16, 2024 | Jun. 21, 2021 | Sep. 30, 2024 | Sep. 30, 2024 | Jun. 30, 2024 | Mar. 31, 2024 | Sep. 30, 2023 | Jun. 30, 2023 | Mar. 31, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2023 | Dec. 31, 2021 | Oct. 01, 2024 | Dec. 31, 2020
ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accumulated deficit |  |  |  | $ (192,717,936) | $ (192,717,936) |  |  |  |  |  | $ (192,717,936) |  | $ (159,367,353) |  |  |
Cash, cash equivalents, and marketable securities |  |  |  | 85,000,000.0 | 85,000,000.0 |  |  |  |  |  | 85,000,000.0 |  |  |  |  |
Milestone payment received |  |  |  |  |  |  |  |  |  |  | (11,139,956) | $ (1,089,977) |  |  |  |
Gross proceeds from sale of common stock |  |  |  |  |  |  |  |  |  |  | 71,481,962 | 2,351,476 |  |  |  |
Revenue recognized under "ERC" |  |  |  |  |  |  |  |  |  |  |  |  | $ 191,463 | $ 191,199 |  |
Receivables under "ERC" |  |  |  | $ 366,551 | 366,551 |  |  |  |  |  | 366,551 |  |  | $ 738,778 |  | $ 738,778
Grant income |  |  |  |  | 0 |  |  | $ 0 |  |  | 0 | 0 |  |  |  |
Research and development |  |  |  |  | 11,807,867 |  |  | 10,028,964 |  |  | 35,413,649 | 26,507,872 |  |  |  |
Comprehensive loss |  |  |  |  | (12,615,494) |  |  | (6,457,093) |  |  | (33,490,175) | (21,517,489) |  |  |  |
Net unrealized gain (loss) on marketable securities |  |  |  |  | $ (58,766) | $ (152,714) | $ 71,888 | $ (66,485) | $ 84,707 | $ (10,258) | $ (139,592) | $ 7,964 |  |  |  |
Antidilutive securities |  |  |  |  | 15,454,599 |  |  | 8,303,253 |  |  | 15,454,599 | 8,303,253 |  |  |  |
Subsequent event |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of common stock shares issued | 5,073,800 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public offering price | $ 17.00 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gross proceeds from sale of common stock | $ 86,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
June 2021 ATM Program |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock, Shares Authorized, Value |  |  | $ 75,000,000.0 |  |  |  |  |  |  |  |  |  |  |  |  |
Number of common stock shares issued |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 9,228,383 |
Average price (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 8.13 |
Gross proceeds from sale of common stock |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 75,000,000.0 |
Nippon Shinyaku | Private placement |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of common stock shares issued |  | 2,798,507 |  | 2,798,507 |  |  |  |  |  |  |  |  |  |  |  |
Public offering price |  | $ 5.36 |  | $ 5.36 | $ 5.36 |  |  |  |  |  | $ 5.36 |  |  |  |  |
Gross proceeds from sale of common stock |  | $ 15,000,000.0 |  | $ 15,000,000.0 |  |  |  |  |  |  |  |  |  |  |  |
Commercialization and Distribution Agreement with Nippon Shinyaku Co, Limited, Japan |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Milestone payment received |  |  |  |  |  |  | $ 10,000,000.0 |  |  |  |  |  |  |  |  |
Maximum | June 2021 ATM Program |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock, Shares Authorized, Value |  |  | $ 75,000,000.0 |  |  |  |  |  |  |  |  |  |  |  |  |

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